Tubular specimen constant deformation stress corrosion test fixture

Abstract

The invention relates to a tubular test sample constant-deformation stress corrosion testing clamp for fixing a tubular test sample to be tested for constant-deformation stress corrosion testing. The tubular test sample constant-deformation stress corrosion testing clamp comprises a bracket and force exerting components, wherein the force exerting components are used for respectively clamping two ends of the tubular test sample, are used for respectively fixing the tubular test sample on two groups of positioning components on two sides of the bracket and are connected with one of the positioning components so as to exert acting force to the tubular test sample; the force exerting component comprises a screw rod and a screw nut; one end of the screw rod can be connected with the positioning components; the other end of the screw rod extends out of the bracket and is connected with the screw nut through fine threads. The clamp provided by the invention is simple in structure and low in cost, constant-deformation stress corrosion testing on the tubular test sample can be conveniently and rapidly performed through manual loading, the deformation of the test sample can be relatively precisely controlled, the deformation constancy of the test sample can be kept, stress corrosion cracking behavior in different deformation states can be compared, and materials and laboratory equipment resources can be saved.

Description

technical field [0001] The invention relates to the technical field of material corrosion testing, in particular to a constant deformation stress corrosion test fixture for a tubular sample, which is suitable for studying the influence of the combined effect of stress and corrosion on the tubular sample, so as to evaluate the service performance of the tubular sample. Background technique [0002] Stress corrosion cracking is a corrosion fracture process caused by the combined action of stress and corrosive environment, which poses certain hidden dangers to the service safety of metal components carried by equipment. It often occurs in petroleum, chemical, energy and other industrial fields. Therefore, it is particularly important to study the comprehensive effect of constant deformation of materials and the environment, and to evaluate the safety and life of materials. [0003] At present, there are three commonly used methods for studying stress corrosion: constant deforma...

AI Technical Summary

Problems solved by technology

The former test is accurate, but the equipment is expensive and occupies a large area, and it is inconvenient to carry and place; the latter has a simple structure and is suitable for batch tests, but when the deformation is large, the extension of the sample may cause the relaxation of the spring or the force torsion. Deformation

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