Magnesium alloy corrosion fatigue performance testing device

Abstract

The utility model discloses a magnesium alloy corrosion fatigue performance testing device, which comprises a corrosion solution box, which is provided with transparent structure panels capable of being opened and closed on the front surface and the back surface, a liquid inlet and a liquid outlet on the side surface, a first connector at the bottom and a second connector at the top, one end of each of the first connector and the second connector is positioned inside the corrosion solution tank, and the other end is positioned outside the corrosion solution tank; the supporting assembly is arranged in the corrosion solution tank and comprises a first connecting shaft which is detachably connected with the end part of the first connector; the first bottom plate is detachably connected with the first connecting shaft; the two supporting parts are respectively and movably arranged on the first bottom plate; the movable baffle is arranged on the two supporting parts; the loading assembly is arranged above the supporting assembly and comprises a second connecting shaft which is detachably connected with the second connector; and the load applying assembly is detachably connected with the second connecting shaft and is used for applying a load to the magnesium alloy sample to be tested.

Description

Technical Field

[0001] The utility model belongs to the technical field of material property testing, and particularly relates to a device for testing the corrosion fatigue performance of magnesium alloys. Background Art

[0002] After a degradable magnesium alloy vascular stent is implanted into the human body, under the pulsating load of the periodic systolic and diastolic blood pressures on the blood vessel wall and the long-term influence of the body temperature of 37°C, mechanical properties decline, fatigue failure occurs, etc., resulting in stent deformation, collapse, displacement or even fracture; in addition, due to the corrosion of ions in the blood, the mechanical properties of the degradable magnesium alloy vascular stent will severely decay. Therefore, it is very necessary to study the stress corrosion and corrosion fatigue behavior of alloys and stents.

[0003] However, the existing three-point / four-point bending static test device for composite materials cannot be tested in a corrosive medium. Moreover, the existing three-point / four-point bending static test device for composite materials lacks normal constraints in the loading direction and boundary constraints along the length direction of the test piece, and cannot achieve self-alignment when the test piece is placed, and cannot constrain test pieces of different sizes. During the fatigue dynamic loading process, the test piece will shift, and the loading position of the test piece will change, and the accuracy of the test results cannot be guaranteed. Summary of the Utility Model

[0004] In view of this, some embodiments disclose a device for testing the corrosion fatigue performance of magnesium alloys, including:

[0005] A corrosion solution tank, with openable and closable transparent structural panels provided on the front and rear surfaces; an inlet and an outlet are provided on the side surface of the corrosion solution tank; a first connector is adaptively provided at the bottom of the corrosion solution tank; one end of the first connector is located inside the corrosion solution tank, and the other end of the first connector is located outside the corrosion solution tank; a second connector is adaptively provided at the top of the corrosion solution tank; one end of the second connector is located inside the corrosion solution tank, and the other end of the second connector is located outside the corrosion solution tank; the first connector and the second connector are opposite in position;

[0006] A support assembly, adaptively provided inside the corrosion solution tank; the support assembly includes:

[0007] A first connecting shaft, detachably connected to the end of the first connector;

[0008] A first bottom plate, detachably connected to the first connecting shaft;

[0009] Two support members, movably provided on the first bottom plate respectively, for supporting the magnesium alloy sample to be tested;

[0010] A movable baffle, adaptively arranged on two support components, for restricting the lateral and longitudinal positions of the magnesium alloy sample to be tested in the horizontal plane;

[0011] A loading component, adaptively arranged above the support component; the loading component includes:

[0012] A second connecting shaft, detachably connected to the second connecting head;

[0013] A load application component, detachably connected to the second connecting shaft, for applying a load to the magnesium alloy sample to be tested.

[0014] For the magnesium alloy corrosion fatigue performance testing device disclosed in some embodiments, the load application component includes:

[0015] A second bottom plate, detachably connected to the second connecting shaft;

[0016] A loading member, arranged to be detachably connected to the second bottom plate, and arranged between the two support components, for applying a load to the magnesium alloy sample to be tested.

[0017] For the magnesium alloy corrosion fatigue performance testing device disclosed in some embodiments, there is one loading member, for applying a load to the magnesium alloy sample to be tested from one position point;

[0018] Alternatively, there are two loading members, spaced apart on the second bottom plate, for applying loads to the magnesium alloy sample to be tested from two position points.

[0019] For the magnesium alloy corrosion fatigue performance testing device disclosed in some embodiments, the loading member includes:

[0020] A second base;

[0021] A loading column, horizontally arranged on the top of the second base and detachably connected to the second base, for applying a load to the magnesium alloy sample to be tested;

[0022] Wherein, a second guide rail is arranged on the second bottom plate, and a second slider adapted to the second guide rail is arranged at the bottom of the second base.

[0023] For the magnesium alloy corrosion fatigue performance testing device disclosed in some embodiments, the load application component includes:

[0024] A second base, and a connection port adapted to the second connecting shaft is provided at the bottom of the second base;

[0025] A loading column, horizontally arranged on the top of the second base and detachably connected to the second base, for applying a load to the magnesium alloy sample to be tested.

[0026] For the magnesium alloy corrosion fatigue performance testing device disclosed in some embodiments, the support component includes;

[0027] The first base;

[0028] The support column is horizontally arranged on the top of the first base and is detachably connected to the first base for supporting the magnesium alloy sample to be tested;

[0029] Wherein, a first guide rail is arranged on the first base plate, and a first slider adapted to the first guide rail is arranged at the bottom of the first base.

[0030] The magnesium alloy corrosion fatigue performance testing device disclosed in some embodiments, the movable baffle includes:

[0031] The L-shaped lateral baffle includes a vertical mounting arm and a lateral limiting arm. The vertical mounting arm of the L-shaped lateral baffle is movably connected to the first base, and the lateral limiting arm of the L-shaped lateral baffle is located outside the support column; the lateral limiting arms of the L-shaped lateral baffles respectively arranged on the two support components are used to limit the lateral position of the magnesium alloy sample to be tested;

[0032] The L-shaped longitudinal baffle includes a vertical mounting arm and a longitudinal limiting arm. The vertical mounting arm of the L-shaped longitudinal baffle is movably connected to the first base, and the longitudinal limiting arm of the L-shaped lateral baffle is located above the support column; the longitudinal limiting arms of the L-shaped longitudinal baffles respectively arranged on the two support components are used to limit the longitudinal position of the magnesium alloy sample to be tested.

[0033] The magnesium alloy corrosion fatigue performance testing device disclosed in some embodiments, a scale line is adaptively arranged on the first base plate, wherein the 0 scale is set at the middle position of the first base plate.

[0034] The magnesium alloy corrosion fatigue performance testing device disclosed in some embodiments, a scale line is adaptively arranged on the second base plate, wherein the 0 scale is set at the middle position of the second base plate.

[0035] The magnesium alloy corrosion fatigue performance testing device disclosed in some embodiments, a sealing strip is adaptively arranged on the corrosion solution tank.

[0036] The magnesium alloy corrosion fatigue performance testing device disclosed in the embodiments of the present invention can perform tests under corrosive media; the setting of the support assembly can be adjusted according to the size of the magnesium alloy sample to be tested, so as to fix the magnesium alloy sample to be tested, constrain the boundary of the magnesium alloy sample to be tested in the normal direction of the loading direction and along the length direction of the magnesium alloy sample to be tested, realize self-centering when placing the magnesium alloy sample to be tested, and prevent the magnesium alloy sample to be tested from shifting during the test; the setting of the loading assembly can perform three-point bending fatigue tests or four-point bending fatigue tests according to requirements. Description of the Drawings

[0037] Figure 1 Schematic structural diagram of the magnesium alloy corrosion fatigue performance testing device in Embodiment 1;

[0038] Figure 2 Structural schematic diagram of the support component in Embodiment 1;

[0039] Figure 3 Structural schematic diagram of the loading component in Embodiment 1;

[0040] Figure 4 Structural schematic diagram of the loading component in Embodiment 2.

[0041] Reference numerals

[0042] 1 Corrosion solution tank 2 First connector

[0043] 3 Second connector 4 Support component

[0044] 5 Loading component 11 Liquid inlet

[0045] 12 Liquid outlet 41 First connecting shaft

[0046] 42 First bottom plate 43 Support member

[0047] 44 Movable baffle 51 Second connecting shaft

[0048] 52 Second bottom plate 53 Loading member

[0049] 431 First base 432 Support column

[0050] 441 L-shaped lateral baffle 442 L-shaped longitudinal baffle

[0051] 531 Second base 532 Loading column

[0052] 100 Magnesium alloy sample to be tested Detailed implementation manners

[0053] The special term "embodiment" here, any embodiment described as "exemplary" does not have to be construed as superior to or better than other embodiments. For the performance index tests in the embodiments of this application, unless otherwise specified, the conventional test methods in the art are adopted. It should be understood that the terms described in this application are only for describing specific embodiments and are not used to limit the content disclosed in this application.

[0054] Unless otherwise specified, the technical and scientific terms used herein have the same meanings as commonly understood by those of ordinary skill in the technical field to which this application belongs; the test methods and technical means not otherwise specifically noted in this application refer to the experimental methods and technical means commonly adopted by those of ordinary skill in the art.

[0055] As used herein, the terms "substantially" and "about" are used to describe minor fluctuations. For example, they can refer to less than or equal to ±5%, such as less than or equal to ±2%, such as less than or equal to ±1%, such as less than or equal to ±0.5%, such as less than or equal to ±0.2%, such as less than or equal to ±0.1%, such as less than or equal to ±0.05%. Numerical data presented or represented herein in a range format is used only for convenience and brevity and should therefore be interpreted flexibly to include not only the values explicitly recited as the bounds of the range but also all individual values or sub-ranges subsumed within that range. For example, a numerical range of "1 to 5%" should be interpreted to include not only the explicitly recited values of 1% to 5% but also individual values and sub-ranges within the indicated range. Thus, individual values such as 2%, 3.5%, and 4% and sub-ranges such as 1% to 3%, 2% to 4%, and 3% to 5% etc. are included within this numerical range. This principle also applies to ranges recited with only a single numerical value. In addition, such interpretation applies regardless of the width of the range or the nature of the feature described.

[0056] As used herein, including in the claims, conjunctive words such as "comprising", "including", "carrying", "having", "containing", "involving", "accommodating", etc. are understood to be open-ended, i.e., meaning "including but not limited to". Only the conjunctive words "consisting of" and "composed of" are closed conjunctive words.

[0057] For a better illustration of the content of the present application, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that the present application can also be implemented without some of these specific details. In the embodiments, some methods, means, instruments, devices, etc. well-known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0058] On the premise of no conflict, the technical features disclosed in the embodiments of the present application can be combined arbitrarily, and the obtained technical solutions belong to the content disclosed in the embodiments of the present application. It should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. mentioned in the present application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing technical features and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention, unless it conflicts with the context. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance, unless it conflicts with the context.

[0059] In some embodiments, the magnesium alloy corrosion fatigue performance testing device includes:

[0060] Corrosion solution tank. Transparent structure panels that can be opened and closed are provided on the front and rear of the corrosion solution tank. Generally, when the transparent structure panels that can be opened and closed are opened, the support component, loading component or magnesium alloy sample to be tested can be loaded and unloaded inside the corrosion solution tank. During the experiment, the state of the magnesium alloy sample to be tested and the equipment can be clearly observed through the transparent structure panels that can be opened and closed; Liquid inlet and outlet are provided on the side of the corrosion solution tank. The corrosion medium is transported into the corrosion solution tank through the liquid inlet, and the corrosion medium in the corrosion solution tank is discharged through the liquid outlet; A first connector is adaptively provided at the bottom of the corrosion solution tank; One end of the first connector is located inside the corrosion solution tank, and the other end of the first connector is located outside the corrosion solution tank and is connected to an external first tensile and compressive testing machine; A second connector is adaptively provided at the top of the corrosion solution tank; One end of the second connector is located inside the corrosion solution tank, and the other end of the second connector is located outside the corrosion solution tank and is connected to an external second tensile and compressive testing machine; The first connector and the second connector are opposite in position;

[0061] Support component, adaptively arranged inside the corrosion solution tank; The support component includes:

[0062] The first connecting shaft is detachably connected to the end of the first connector;

[0063] The first bottom plate is detachably connected to the first connecting shaft; Usually, the first connecting shaft and the first connector are connected by threads; The first bottom plate and the first connecting shaft are connected by threads;

[0064] There are two support members, which are respectively movably arranged on the first bottom plate and are used to support the magnesium alloy sample to be tested; The positions of the two support members can be adjusted according to the size of the magnesium alloy sample to be tested so that the positions of the two support members correspond to the positions of the two ends of the magnesium alloy sample to be tested;

[0065] A movable baffle is adaptively arranged on the two support members and is used to limit the lateral and longitudinal positions of the magnesium alloy sample to be tested in the horizontal plane; According to the size of the magnesium alloy sample to be tested, the movable baffle can be adjusted to limit the magnesium alloy sample to be tested, so as to avoid the position of the magnesium alloy sample to be tested from shifting when the loading component applies a load to the magnesium alloy sample to be tested, and realize self-centering when placing the magnesium alloy sample to be tested;

[0066] Loading component, adaptively arranged above the support component; The loading component includes:

[0067] The second connecting shaft is detachably connected to the second connector; Usually, the second connecting shaft and the second connector are connected by threads;

[0068] The load application component is detachably connected to the second connecting shaft and is used to apply a load to the magnesium alloy sample to be tested.

[0069] In some embodiments, the load application assembly includes:

[0070] A second base plate detachably connected to the second connecting shaft; generally, the second base plate is threadedly connected to the second connecting shaft;

[0071] A loading member detachably connected to the second base plate and disposed between two support members for applying a load to the magnesium alloy sample to be tested; generally, the loading member can also be directly connected to the second connecting shaft, and the loading member can be adaptively installed according to requirements, so as to perform three-point / four-point bending fatigue tests.

[0072] In some embodiments, there is one loading member for applying a load to the magnesium alloy sample to be tested from one position point;

[0073] Alternatively, there are two loading members spaced apart on the second base plate for applying loads to the magnesium alloy sample to be tested from two position points.

[0074] In some embodiments, the loading member includes:

[0075] A second base detachably connected to the second base plate; generally, the second base can also be directly connected to the second connecting shaft and can be adaptively installed according to requirements, so as to perform three-point / four-point bending fatigue tests;

[0076] A loading column horizontally disposed on the top of the second base and detachably connected to the second base for applying a load to the magnesium alloy sample to be tested; generally, the loading column is connected to the top of the first base through nuts and gaskets, which facilitates the installation and removal of the loading column; generally, there are at least four loading columns, which facilitates replacement after wear;

[0077] Wherein, a second guide rail is provided on the second base plate, and a second slider adapted to the second guide rail is provided at the bottom of the second base.

[0078] In some embodiments, the load application assembly includes:

[0079] A second base, and a connection port adapted to the second connecting shaft is provided at the bottom of the second base;

[0080] A loading column horizontally disposed on the top of the second base and detachably connected to the second base for applying a load to the magnesium alloy sample to be tested. The load application assembly disclosed in this embodiment is suitable for performing three-point bending fatigue tests.

[0081] In some embodiments, the support member includes;

[0082] A first base;

[0083] Support columns are horizontally arranged on the top of the first base and are detachably connected to the first base for supporting the magnesium alloy sample to be tested. Generally, the support columns are connected to the top of the first base through nuts and gaskets, which facilitates the installation and disassembly of the support columns. Generally, at least four support columns are provided to facilitate replacement after wear.

[0084] Among them, a first guide rail is provided on the first bottom plate, and a first slider adapted to the first guide rail is provided at the bottom of the first base.

[0085] In some embodiments, the movable baffle includes:

[0086] An L-shaped lateral baffle, including a vertical mounting arm and a lateral limiting arm. The vertical mounting arm of the L-shaped lateral baffle is movably connected to the first base, and the lateral limiting arm of the L-shaped lateral baffle is located outside the support columns. The lateral limiting arms of the L-shaped lateral baffles respectively provided on the two support members are located outside the two end portions of the magnesium alloy sample to be tested, for limiting the lateral position of the magnesium alloy sample to be tested and preventing the lateral offset of the magnesium alloy sample to be tested along its length direction. Generally, the L-shaped lateral baffle is connected to the first base through a nut, and a scale is provided at the position of the first base for mounting the L-shaped lateral baffle, and the position of the L-shaped lateral baffle can be adjusted according to the length of the magnesium alloy sample to be tested, so as to realize the constraint on the boundary of the magnesium alloy sample to be tested along the length direction of the magnesium alloy sample.

[0087] An L-shaped longitudinal baffle, including a vertical mounting arm and a longitudinal limiting arm. The vertical mounting arm of the L-shaped longitudinal baffle is movably connected to the first base, and the longitudinal limiting arm of the L-shaped lateral baffle is located above the support columns. The longitudinal limiting arms of the L-shaped longitudinal baffles respectively provided on the two support members are located outside the two side edges of the magnesium alloy sample to be tested, for limiting the longitudinal position of the magnesium alloy sample to be tested and preventing the normal offset of the magnesium alloy sample to be tested along the loading direction. Generally, the L-shaped longitudinal baffle is connected to the first base through a nut, and a scale is provided at the position of the first base for mounting the L-shaped longitudinal baffle, and the position of the L-shaped longitudinal baffle can be adjusted according to the width of the magnesium alloy sample to be tested, so as to realize the constraint on the boundary of the magnesium alloy sample to be tested in the normal direction of the loading direction.

[0088] In some embodiments, two L-shaped longitudinal baffles can be provided on each support member, and the two L-shaped longitudinal baffles are arranged at intervals. When the magnesium alloy sample to be tested is arranged on the support member, the end portion of the magnesium alloy sample to be tested is limited between the two L-shaped longitudinal baffles.

[0089] In some embodiments, scale lines are adaptively provided on the first bottom plate, wherein the 0 scale is set at the middle position of the first bottom plate to facilitate the adjustment of the setting position of the first base.

[0090] In some embodiments, scale lines are adaptively provided on the second bottom plate, where the 0 scale is set at the middle position of the second bottom plate to facilitate adjusting the setting position of the second base.

[0091] In some embodiments, a sealing strip is adaptively provided on the corrosion solution tank. Generally, sealing strips are adaptively provided at the positions where the front and rear of the corrosion solution tank are provided with openable and closable transparent structural panels, and sealing strips are adaptively provided at the parts of the corrosion solution tank where the first connection heads are provided to prevent the leakage of corrosive media.

[0092] The following further exemplarily illustrates the technical details in conjunction with embodiments.

[0093] Embodiment 1

[0094] Figure 1 FIG. is a schematic structural diagram of the magnesium alloy corrosion fatigue performance testing device disclosed in Embodiment 1; Figure 2 FIG. is a schematic structural diagram of the support assembly disclosed in Embodiment 1; Figure 3 FIG. is a schematic structural diagram of the loading assembly disclosed in Embodiment 1.

[0095] As Figures 1 to 3 shown, the magnesium alloy corrosion fatigue performance testing device includes a corrosion solution tank 1. An inlet 11 and an outlet 12 are provided on the right side surface of the corrosion solution tank 1. Openable and closable transparent structural panels are provided on the front and rear of the corrosion solution tank. A first connection head 2 is provided at the bottom of the corrosion solution tank 1. One end of the first connection head 2 is located inside the corrosion solution tank 1, and the other end is located outside the corrosion solution tank 1. A second connection head 3 is provided at the top of the corrosion solution tank 1. One end of the second connection head 3 is located inside the corrosion solution tank 1, and the other end is located outside the corrosion solution tank 1. The first connection head 2 and the second connection head 3 are opposite in position; a support assembly 4 connected to the first connection head 2 and a loading assembly 5 connected to the second connection head 3;

[0096] Among them, the support assembly 4 includes a first connection shaft 41 detachably connected to the first connection head 2, a first bottom plate 42 detachably connected above the first connection shaft 41, two support members 43 movably provided on the first bottom plate 42, and a movable baffle 44 provided on the support member 43;

[0097] The loading assembly 5 includes a second connection shaft 51 detachably connected to the second connection head 3, a second bottom plate 52 detachably connected below the second connection shaft 51, two loading members 53 detachably provided on the second bottom plate 52, and the two loading members 53 are directly above the two support members 43;

[0098] Among them, the support member 43 includes a first base 431 and a support column 432 detachably provided on the first base 431. The first base 431 moves on the first base plate 42 through the first slider at its bottom and the first guide rail on the first base plate 42;

[0099] The movable baffle 44 includes an L-shaped transverse baffle 441 and an L-shaped longitudinal baffle 442. The L-shaped transverse baffle 441 is used to prevent the lateral offset of the magnesium alloy sample to be tested along its length direction, and the L-shaped longitudinal baffle 442 is used to prevent the normal offset of the magnesium alloy sample to be tested along the loading direction;

[0100] The loading member 53 includes a second base 531 and a loading column 532 detachably provided on the second base 531. The second base 531 moves on the second base plate 52 through the second slider at its bottom and the second guide rail on the second base plate 52;

[0101] Among them, when setting the magnesium alloy sample 100 to be tested, the magnesium alloy sample 100 to be tested is located between the support column 432 and the loading column 532;

[0102] When performing the four-point bending fatigue test, first, according to the size of the magnesium alloy sample to be tested, adjust the positions of the two support members 43 and the movable baffle 44 to support and fix the magnesium alloy sample to be tested. Then, adjust the two loading members 53 to determine the two position points for applying the load to the magnesium alloy sample to be tested. Finally, introduce the corrosive medium through the liquid inlet 11 of the corrosion solution tank to submerge the magnesium alloy sample to be tested, and connect the first connector 2 and the second connector 3 to the external tensile and compressive testing machine respectively to perform the test;

[0103] When performing the three-point bending fatigue test, refer to the four-point bending fatigue test. Among them, only one loading member is provided on the second base plate 52, or the second base plate 52 is removed, and one loading member is directly connected to the second connecting shaft 51 to determine one position point for applying the load to the magnesium alloy sample to be tested.

[0104] Embodiment 2

[0105] Figure 4 It is a schematic structural diagram of the loading assembly disclosed in Embodiment 2.

[0106] The loading assembly disclosed in this embodiment is applicable to performing the three-point bending fatigue test. As Figure 4 shown, the loading assembly includes a second connecting shaft 51, a second base 531 detachably connected to the second connecting shaft 51, and a loading column 532 detachably connected to the second base 531. Among them, a connection port adapted to the second connecting shaft 51 is provided on the second base 531.

[0107] The magnesium alloy corrosion fatigue performance testing device disclosed in the embodiments of the present utility model can be tested under a corrosive medium; the setting of the support assembly can be adjusted according to the size of the magnesium alloy sample to be tested, so as to fix the magnesium alloy sample to be tested, and constrain the boundary of the magnesium alloy sample to be tested in the normal direction of the loading direction and along the length direction of the magnesium alloy sample to be tested, realizing self-centering when placing the magnesium alloy sample to be tested and preventing the magnesium alloy sample to be tested from shifting during the test; the setting of the loading assembly can perform three-point bending fatigue testing or four-point bending fatigue testing according to requirements.

[0108] The technical solutions disclosed in the present utility model and the technical details disclosed in the embodiments are only exemplary illustrations of the inventive concept of the present utility model, and do not constitute a limitation on the technical solutions of the present utility model. Any conventional changes, substitutions or combinations made to the technical details disclosed in the embodiments of the present utility model have the same inventive concept as the present utility model and are within the protection scope of the claims of the present utility model.

Claims

1. A device for testing the corrosion fatigue performance of magnesium alloys, characterized in that, Comprising: An etching solution tank, with openable and closable transparent structural panels provided on the front and rear of the etching solution tank; an inlet and an outlet are provided on the side of the etching solution tank; a first connector is adaptively provided at the bottom of the etching solution tank; one end of the first connector is located inside the etching solution tank, and the other end of the first connector is located outside the etching solution tank; a second connector is adaptively provided at the top of the etching solution tank; one end of the second connector is located inside the etching solution tank, and the other end of the second connector is located outside the etching solution tank; the first connector and the second connector are opposite in position; A support assembly, adaptively provided inside the etching solution tank; the support assembly includes: A first connecting shaft, detachably connected to the end of the first connector; A first bottom plate, detachably connected to the first connecting shaft; Two support members, respectively movably provided on the first bottom plate, for supporting the magnesium alloy sample to be tested; A movable baffle, adaptively provided on the two support members, for restricting the lateral and longitudinal positions of the magnesium alloy sample to be tested in the horizontal plane; A loading assembly, adaptively provided above the support assembly; the loading assembly includes: A second connecting shaft, detachably connected to the second connector; A load application assembly, detachably connected to the second connecting shaft, for applying a load to the magnesium alloy sample to be tested.

2. The magnesium alloy corrosion fatigue performance testing device according to claim 1, characterized in that, The load application assembly includes: A second bottom plate, detachably connected to the second connecting shaft; A loading member, detachably connected to the second bottom plate, provided between the two support members, for applying a load to the magnesium alloy sample to be tested.

3. The magnesium alloy corrosion fatigue performance testing device according to claim 2, wherein, One loading member is provided, for applying a load to the magnesium alloy sample to be tested from one position point; Or, two loading members are provided, spaced on the second bottom plate, for applying loads to the magnesium alloy sample to be tested from two position points.

4. The magnesium alloy corrosion fatigue performance testing device according to claim 2, characterized in that, The loading member includes: A second base; A loading column, horizontally provided on the top of the second base and detachably connected to the second base, for applying a load to the magnesium alloy sample to be tested; Wherein, a second guide rail is provided on the second bottom plate, and a second slider adapted to the second guide rail is provided at the bottom of the second base.

5. The magnesium alloy corrosion fatigue performance testing device according to claim 1, wherein, The load application assembly includes: A second base, with a connection port adapted to the second connecting shaft provided at the bottom of the second base; A loading column, horizontally provided on the top of the second base and detachably connected to the second base, for applying a load to the magnesium alloy sample to be tested.

6. The magnesium alloy corrosion fatigue performance testing device according to claim 1, characterized in that The support member includes; A first base; A support column, horizontally provided on the top of the first base and detachably connected to the first base, for supporting the magnesium alloy sample to be tested; Wherein, a first guide rail is provided on the first bottom plate, and a first slider adapted to the first guide rail is provided at the bottom of the first base.

7. The magnesium alloy corrosion fatigue performance testing device according to claim 6, wherein The movable baffle includes: The L-shaped horizontal baffle includes a vertical mounting arm and a horizontal limiting arm. The vertical mounting arm of the L-shaped horizontal baffle is movably connected to the first base, and the horizontal limiting arm of the L-shaped horizontal baffle is located outside the support column; the horizontal limiting arms of the L-shaped horizontal baffles respectively arranged on the two support components are used to limit the horizontal position of the magnesium alloy sample to be tested; The L-shaped vertical baffle includes a vertical mounting arm and a vertical limiting arm. The vertical mounting arm of the L-shaped vertical baffle is movably connected to the first base, and the vertical limiting arm of the L-shaped horizontal baffle is located above the support column; the vertical limiting arms of the L-shaped vertical baffles respectively arranged on the two support components are used to limit the vertical position of the magnesium alloy sample to be tested.

8. The magnesium alloy corrosion fatigue performance testing device according to claim 1, characterized in that Scale lines are adaptively arranged on the first bottom plate, and among them, the 0 scale is set at the middle position of the first bottom plate.

9. The magnesium alloy corrosion fatigue performance testing device according to claim 2, characterized in that, Scale lines are adaptively arranged on the second bottom plate, and among them, the 0 scale is set at the middle position of the second bottom plate.

10. The magnesium alloy corrosion fatigue performance testing device according to claim 1, characterized in that, A sealing strip is adaptively arranged on the corrosion solution tank.

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