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Synchrotron radiation in-situ imaging fatigue testing machine comprising temperature control mechanism and testing method of synchrotron radiation in-situ imaging fatigue testing machine

A technology of fatigue testing machine and temperature control mechanism, applied in the field of fatigue testing machine, can solve the problems of structural collapse, unpredictable and controllable cold brittle failure of components, and high hazard.

Active Publication Date: 2017-05-17
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

The cold and brittle failure of components cannot be predicted and controlled, and is extremely harmful. Once it occurs, the entire structure will collapse instantly

Method used

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  • Synchrotron radiation in-situ imaging fatigue testing machine comprising temperature control mechanism and testing method of synchrotron radiation in-situ imaging fatigue testing machine
  • Synchrotron radiation in-situ imaging fatigue testing machine comprising temperature control mechanism and testing method of synchrotron radiation in-situ imaging fatigue testing machine

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Embodiment Construction

[0022] A synchrotron radiation in-situ imaging fatigue testing machine with a temperature control mechanism, comprising a bottom plate 1, the bottom plate cross 101 of the bottom plate 1 is fitted on the synchrotron radiation light source platform 2, and the middle part of the upper surface of the bottom plate 1 is fixed with a barrel-shaped base 3 , the push rod 4 is installed on the left wall and the right wall of the base 3 through the second horizontal linear bearing 19 . A servo motor 5 is installed on the left side of the upper surface of the base plate 1, and a cam 6 is installed on the shaft of the servo motor 5. The left end of the push rod 4 stretches out from the base 3 and contacts the right edge of the cam 6. The lower end is hinged, and the right end of the push rod 4 is connected to the right wall of the base 3 by a spring 9 .

[0023] It also includes a clamping mechanism and a temperature control mechanism.

[0024] The clamping mechanism includes a sample cl...

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Abstract

The invention discloses a synchrotron radiation in-situ imaging fatigue testing machine comprising a temperature control mechanism and a testing method of the synchrotron radiation in-situ imaging fatigue testing machine, and belongs to the field of fatigue testing machines. The synchrotron radiation in-situ imaging fatigue testing machine comprising the temperature control mechanism comprises a base and a top cover, wherein the bottom of a bottom plate is inlaid in a synchrotron radiation light source platform in a cross manner; a clamping mechanism is arranged on the cylindrical base of the synchrotron radiation light source platform; and the temperature control mechanism is arranged between the base and the cylindrical top cover. The testing method comprises the following steps: clamping a sample between an upper clamp and a lower clamp; then fixing an inner enclosure and an outer enclosure well; feeding temperature control air flow and nitrogen to the inner side and the outer layer of the inner enclosure of the testing machine to control the temperature of the sample and prevent water spray from being produced on the enclosure; and then starting a servo motor, applying vertical reciprocating loading to the sample, and acquiring pressure by using a load sensor. The testing machine can analyze fatigue properties of the sample at different temperatures, and microstructure morphology and defects of a material can be observed well.

Description

technical field [0001] The invention belongs to the field of fatigue testing machines, in particular to a synchrotron radiation in-situ imaging fatigue testing machine with a temperature control mechanism and a testing method thereof. Background technique [0002] For a long time, people have carried out a lot of research on the fatigue damage of engineering structures. It is generally believed that the fatigue life is mainly consumed in the stages of crack initiation and short crack growth. Macroscopically, the propagation behavior of short cracks changes with the increase of crack length, and microscopically, it is also affected by factors such as metal microstructure and environment, coupled with crack closure and small crack effects, etc. The problem of short crack propagation becomes very complicated. In order to better explore the relationship between the crack growth process and microstructure changes and macroscopic mechanical properties, and to provide a more reli...

Claims

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Application Information

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IPC IPC(8): G01N3/38G01N3/04G01N3/06G01N3/02
Inventor 吴圣川宋哲张思齐
Owner SOUTHWEST JIAOTONG UNIV
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