Micro specimen and hydraulic bulge testing method

Abstract

The invention relates to the field of metal material mechanical property testing, and provides a micro specimen and a hydraulic bulge testing method.The micro specimen comprises a specimen body which is a sheet body.A direction marker is arranged on the surface of the specimen body and is in or opposite to the bending direction of the specimen body.The influences of initial deformation of the micro specimen on testing results can be reduced, and the accuracy of hydraulic bulge testing results is improved.

Description

technical field [0001] The invention relates to the testing of mechanical properties of metal materials, in particular to a micro-sample and a hydraulic pressure inflation test method. Background technique [0002] Nuclear facilities, power plants and petrochemical equipment are highly dangerous facilities, so some structural designs of these facilities are designed according to relatively conservative principles. At the end of the 1970s, when the operating time of nuclear power plants in some countries was about to reach the design life, people were faced with the choice of stopping or continuing to operate. Therefore, it is necessary to test the mechanical properties of materials of in-service equipment structures. Since these materials have been operating under high temperature or radiation conditions for a long time, after a period of service, it is necessary to determine whether the properties of the materials have changed, so as to determine whether these structures c...

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Problems solved by technology

[0004] However, the force state of the small disc sample during the small punch test is complicated, and it is difficult to conduct effective theoretical analysis to obtain an analytical solution. Therefore, the research mainly focuses on the data accumulation of the test, and on the basis of the data accumulation, the small punch can be obtained. Empirical formulas relating rod test results to material mechanical properties, as well as simulating the test process through finite element calculations, and interpreting the

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