Metal material compression creep testing device and measuring method thereof

Abstract

The invention discloses a metal material compression creep testing device and a measuring method thereof, and belongs to the technical field of metal material performance testing. The testing device comprises an upper clamp and a lower clamp, the upper clamp comprises an upper plate I, a lower bottom plate I, a stand column I and an upper stretching rod, and the lower clamp comprises an upper plate II, a lower bottom plate II, a stand column II and a lower stretching rod. The boss is arranged on the upper surface of the lower bottom plate I, and a metal material sample is placed on the boss; the two gratings are fixed on the lower bottom plate I through a grating fixer; when the tensile creep testing machine is used for stretching, the upper pull rod and the lower pull rod are driven to relatively move upwards and downwards, so that pressure stress is generated in a test sample, compressive creep deformation is generated, and real-time measurement and recording are carried out throughthe grating ruler sensor. The compression creep performance of the metal material can be tested through an existing tensile creep testing machine, the applicability is good, the cost is saved, and themeasurement precision the same as that of tensile creep is achieved.

Description

technical field [0001] The invention relates to the technical field of metal material performance testing, in particular to a metal material compressive creep testing device and a testing method, which are suitable for creep testing and testing of metal materials under compressive stress. Background technique [0002] Creep refers to the phenomenon that the material slowly deforms plastically under the action of constant temperature and constant load for a long time. The creep properties of materials directly affect the service life of materials. Therefore, it is of great significance to study the creep properties of materials, that is, to study the variation law of material deformation with temperature, stress and time, for the application of materials. [0003] Metal materials such as superalloy and titanium alloy are indispensable key structural materials for aerospace, energy and chemical industry, national defense weapons and equipment and national economic construction...

AI Technical Summary

Problems solved by technology

Therefore, the compression creep test has to be done with an ordinary universal testing machine, and the measurement of deformation is difficult to meet the research requirements, especially the long-term creep deformation is more difficult to measure

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