An in-situ observation device for rolling deformation process using a scanning electron microscope

Abstract

The present invention belongs to the technical field of scanning electron microscope sample stages, and specifically relates to an in-situ observation device for the rolling deformation process of a scanning electron microscope. An in-situ rolling device is installed on the stretching table of the scanning electron microscope, and the in-situ rolling device includes two bases, one base is equipped with two rollers and two mechanical wrenches connected to the rollers and extending out of the base, and the other base is used to push the wrenches to move. The device is installed on the stretching table in the scanning electron microscope, and can provide thrust through the stretching table to push the mechanical wrenches, thereby converting the unidirectional thrust into the rolling driving force of the rollers to realize the rolling process. During the displacement of the in-situ stretching table, a rolling process is generated, so that the metal plastic deformation of the side of the rolled piece is observed by the scanning electron microscope, and the in-situ observation of the rolling process is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of scanning electron microscope sample stages, and in particular relates to an in-situ observation device for a rolling deformation process of a scanning electron microscope. Background Art

[0002] The scanning electron microscope bombards the sample surface with a finely focused electron beam, and observes and analyzes the sample surface or fracture morphology through secondary electrons and backscattered electrons generated by the interaction between the electrons and the sample. Therefore, the scanning electron microscope is the main instrument for microstructural analysis and has been widely used in materials, metallurgy, minerals, biology and other fields. The in-situ stretching table combined with the scanning electron microscope can track, observe and record the deformation process of material stretching, compression and bending in real time. However, after literature retrieval and research, it was found that in-situ deformation observation is mainly focused on stretching and compression, while metal strip rolling is a more complex comprehensive deformation process, and its microscopic unit rheological properties and the coordinated deformation process between different grains especially require in-situ experimental observation. This requirement cannot yet be achieved through existing institutions. Summary of the invention

[0003] The purpose of the present invention is to provide an in-situ observation device for the rolling deformation process of a scanning electron microscope, so as to solve the problem of lack of necessary in-situ observation technology for the rheological properties of microscopic units and the coordinated deformation process between different grains during the rolling process of metal plates and strips.

[0004] In order to solve the above technical problems, the technical solution of the present invention is:

[0005] The invention discloses an in-situ observation device for a rolling deformation process of a scanning electron microscope. The in-situ rolling device is installed on a stretching table of the scanning electron microscope. The in-situ rolling device comprises two rollers, two mechanical wrenches and two bases. The upper and lower ends of each roller are cylindrical parts. The middle part of each roller is a hexagonal prism or a quadrangular prism. The two bases are respectively a first base and a second base which are arranged opposite to each other. The first base and the second base are installed on the stretching table of the scanning electron microscope. A horizontal groove is provided at one end of the first base opposite to the second base. Two vertical rollers are respectively inserted into the upper plate and the lower plate of the groove. , and is relatively hingedly installed on the first base through the cylindrical parts at the upper and lower ends, a roller gap is formed between the two rollers extending to the upper surface of the first base, each roller is clamped with the head of a mechanical wrench through the hexagonal prism or quadrangular prism in the middle part, and the handle of the mechanical wrench extends out of the groove of the first base; two force-applying ends are arranged at the end of the second base opposite to the first base, each force-applying end corresponds to the handle of a mechanical wrench, the mechanical wrench is pushed to move through the second base, the driving force is converted into a rolling driving force, and the sample is rolled by the rollers extending above the first base.

[0006] The scanning electron microscope in-situ observation device for the rolling deformation process is used as follows: first, the sample is placed on the bite side of the roll gap above the first base, with the observation surface of the processed sample facing upward, and the mechanical wrench that clamps the roll is opened to bite the sample; then the sample fixing table on the scanning electron microscope stretching table is moved to the maximum distance state, and the in-situ rolling device is fixed to the sample fixing table of the stretching table; finally, the stretching table is installed in the scanning electron microscope for experiments, the sample is rolled by moving the stretching table, and the scanning electron microscope is used for observation.

[0007] The scanning electron microscope in-situ observation device for rolling deformation process is an extended function mechanical device developed based on the scanning electron microscope in-situ stretching platform. The scanning electron microscope observes the entire deformation process, and the stretching platform is used to provide a deformation load source.

[0008] The in-situ observation device for the rolling deformation process of the scanning electron microscope is designed based on the in-situ stretching table in the scanning electron microscope. Its base is fixed to the movable sample fixing tables on both sides of the stretching table by screws provided by the stretching table, and moves with the movement of the sample fixing table on the stretching table.

[0009] The in-situ observation device for rolling deformation process of the scanning electron microscope comprises two rolling rollers, which are fixed by a first base and given rotational driving force by two mechanical wrenches respectively.

[0010] The in-situ observation device for the rolling deformation process of the scanning electron microscope, the in-situ rolling device pushes the mechanical wrench through the stretching table, and converts the driving force of the stretching table into the driving force for the rotation of the roller.

[0011] The in-situ observation device for the rolling deformation process of the scanning electron microscope is designed such that the size of the roll gap in the in-situ rolling device is achieved by changing the roll diameter or the distance between the roll mounting holes on the first base.

[0012] In the scanning electron microscope in-situ observation device for rolling deformation process, the sample is installed on one side of the roll gap of the roller on the upper side of the first base, and the rolling deformation image of the sample side is observed by the scanning electron microscope.

[0013] In the scanning electron microscope in-situ observation device for rolling deformation process, the method of providing the rolling driving force is not limited to the mechanical wrench, and the mechanical wrench is replaced by a lever or a gear.

[0014] The design concept of the present invention is:

[0015] The present invention converts the thrust of the in-situ stretching table into rolling force to realize the rolling deformation of the sample on the stretching table. In addition, the design retains a sufficient observation field, and the change law of the microstructure of the sample during the rolling deformation process can be observed in real time by a scanning electron microscope, thereby realizing the in-situ observation of the rolling deformation process of the sample by a scanning electron microscope.

[0016] The advantages and beneficial effects of the present invention are:

[0017] 1. The present invention installs an in-situ rolling device on the stretching table of the scanning electron microscope. The in-situ rolling device includes two bases, one of which is equipped with two rollers and two mechanical wrenches connected to the rollers and extending out of the base, and the other base is used to push the wrenches to move. The device is installed on the stretching table in the scanning electron microscope, and the stretching table can provide thrust to push the mechanical wrenches, thereby converting the unidirectional thrust into the rolling driving force of the rollers to realize the rolling process.

[0018] 2. The present invention can expand the function of the scanning electron microscope stretching platform, so that it has the function of rolling sample plates and strips, and realize the in-situ observation experiment of the rolling process of plate and strip samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure diagram of the in-situ rolling device in the in-situ observation device of the rolling deformation process of the present invention is shown in FIG. (a) is two rollers arranged opposite to each other, (b) is a combination of a roller and a mechanical wrench, and (c) is a combination of a roller, a mechanical wrench and a base. In the figure: 1 roller, 2 mechanical wrench, 3 base (31 first base, 32 second base, 33 force end, 34 groove), 4 sample.

[0020] Figure 2 The following are the actual photos and installation photos of the in-situ observation device for the rolling deformation process. Among them, (a) is a scanning electron microscope, (b) is the stretching platform of the scanning electron microscope, and (c) is the in-situ rolling device of the stretching platform.

[0021] Figure 3 This is a photo of the sample observed using a scanning electron microscope. DETAILED DESCRIPTION

[0022] like Figure 1As shown, the in-situ rolling device in the in-situ observation device for rolling deformation process of the present invention comprises two rollers 1, two mechanical wrenches 2 and two bases 3, the upper and lower ends of each roller 1 are cylindrical parts, the middle part of each roller 1 is a hexagonal prism or a quadrangular prism, the two bases 3 are respectively a first base 31 and a second base 32 arranged opposite to each other, the first base 31 and the second base 32 are installed on the scanning electron microscope stretching table, wherein: a horizontal groove 34 is provided at the opposite end of the first base 31 and the second base 32, two vertical rollers 1 are respectively penetrated through the upper plate and the lower plate of the groove 34, and are relatively hingedly installed on the first base 31 through the cylindrical parts at the upper and lower ends, and a roller gap is formed between the two rollers 1 extending to the upper surface of the first base 31, each roller 1 is clamped with the head of a mechanical wrench 2 through the hexagonal prism or the quadrangular prism in the middle part, and the handle of the mechanical wrench 2 extends out of the groove 34 of the first base 31. Two force-applying ends 33 are provided at one end of the second base 32 opposite to the first base 31. Each force-applying end 33 corresponds to the handle of a mechanical wrench 2. The mechanical wrench 2 is pushed to move by the second base 32 to convert the driving force into a rolling driving force, and the sample 4 is rolled by the rolling roller 1 extending above the first base 31.

[0023] like Figure 1-Figure 2 As shown, during the experiment, the sample 4 is first placed on the biting side of the roll gap of the roller 1 above the base 3, the observation surface of the processed sample 4 is facing up, and the mechanical wrench 2 that clamps the roller 1 is moved to bite the sample 4. Then the sample fixing table on the scanning electron microscope stretching table is moved to the maximum distance state, and the in-situ rolling device is fixed to the sample fixing table of the stretching table. Finally, the stretching table is installed in the scanning electron microscope for experiment. During the experiment, the sample is rolled by moving the stretching table, and the scanning electron microscope is used for observation.

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Example

[0026] like Figure 1-Figure 2 As shown, for the zirconium-based amorphous alloy sample Zr 53.5 Hf 1.5 Cu 30 Al 10 Ni5 (atomic percentage), the experimental process is as follows:

[0027] a) Place the sample on the biting side of the roll gap above the base of the in-situ rolling device, with the observation surface of the electrolytically polished sample facing upward, and move the mechanical wrench that clamps the roll to bite the sample.

[0028] b) Move the sample fixing stage on the scanning electron microscope stretching stage to the maximum distance state, and fix the device on the sample fixing stage of the stretching stage.

[0029] c) Install the stretching table into the scanning electron microscope for experiment. During the experiment, the sample is rolled by moving the stretching table, and the morphology of the sample is observed using the scanning electron microscope. Figure 3 As shown, four observation areas A, B, C, and D were selected on the sample and observed separately. From the observation photos, it can be seen that the formation and evolution process of the shear band during rolling was well observed.

[0030] The implementation results show that the present invention generates a rolling process during the displacement of the in-situ stretching table, so that the metal plastic deformation of the side of the rolled piece can be observed by a scanning electron microscope, thereby realizing in-situ observation of the rolling process.

Claims

1. A scanning electron microscope in-situ observation device for rolling deformation process, characterized in that: An in-situ rolling device is installed on the stretching table of the scanning electron microscope. The in-situ rolling device includes two rollers, two mechanical wrenches and two bases. The upper and lower ends of each roller are cylindrical parts, and the middle part of each roller is a hexagonal prism or a quadrangular prism. The two bases are respectively a first base and a second base arranged opposite to each other. The first base and the second base are installed on the stretching table of the scanning electron microscope, wherein: a horizontal groove is provided at one end of the first base opposite to the second base, and two vertical rollers are respectively inserted into the upper plate and the lower plate of the groove, and are connected to the upper and lower cylindrical ends of the rollers. The two rolling rollers are hingedly mounted on the first base, and a roller gap is formed between the two rollers extending to the upper surface of the first base. Each roller is clamped with the head of a mechanical wrench through a hexagonal prism or a quadrangular prism in the middle part, and the handle of the mechanical wrench extends out of the groove of the first base; two force-applying ends are arranged at the end of the second base opposite to the first base, and each force-applying end corresponds to the handle of a mechanical wrench. The mechanical wrench is pushed to move by the second base, and the driving force is converted into a rolling driving force, and the sample is rolled by the rollers extending above the first base; During use, the sample is first placed on the biting side of the roll gap above the first base, with the observation surface of the processed sample facing upward, and the mechanical wrench that clamps the roll is moved to bite the sample in; then the sample fixing table on the scanning electron microscope stretching table is moved to the maximum distance state, and the in-situ rolling device is fixed on the sample fixing table of the stretching table; finally, the stretching table is installed in the scanning electron microscope for experiment, and the sample is rolled by moving the stretching table, and the scanning electron microscope is used for observation; The size of the roll gap in the in-situ rolling device is achieved by changing the roll diameter or the distance between the roll mounting holes on the first base.

2. The in-situ observation device for rolling deformation process using a scanning electron microscope according to claim 1, characterized in that: The in-situ rolling device is an extended functional mechanical device developed based on the scanning electron microscope in-situ stretching table. The scanning electron microscope observes the entire deformation process, and the stretching table is used to provide the deformation load source.

3. The in-situ observation device for rolling deformation process using a scanning electron microscope according to claim 1, characterized in that: The in-situ rolling device is designed based on the in-situ stretching table in the scanning electron microscope. Its base is fixed to the movable sample fixing tables on both sides of the stretching table by screws provided by the stretching table, and moves with the movement of the sample fixing table on the stretching table.

4. The in-situ observation device for rolling deformation process using a scanning electron microscope according to claim 1, characterized in that: The in-situ rolling device comprises two rollers, which are fixed by a first base and are given rotational driving force by two mechanical wrenches respectively.

5. The in-situ observation device for rolling deformation process using a scanning electron microscope according to claim 1, characterized in that: The in-situ rolling device pushes a mechanical wrench through the stretching table to convert the driving force of the stretching table into a driving force for the roller to rotate.

6. The in-situ observation device for rolling deformation process using a scanning electron microscope according to claim 1, characterized in that: The sample is installed on one side of the roll gap on the upper side of the first base, and the rolling deformation image of the side of the sample is observed by a scanning electron microscope.

7. The in-situ observation device for rolling deformation process using a scanning electron microscope according to claim 1, characterized in that: The method of applying the rolling driving force is not limited to the mechanical wrench, and the mechanical wrench can be replaced by a lever or a gear.

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