High-temperature in situ tension-fatigue test system and test method thereof

Abstract

The invention relates to a high-temperature in situ tension-fatigue test system and a test method thereof, and belongs to the technical field of scientific instruments and material test. The test system comprises a tensile loading and detecting unit, a fatigue loading and detecting unit, an in situ observation unit, and a high temperature loading and detecting unit. The tensile loading and detecting unit is powered by a motor, and realizes quasi-static loading through worms, gears and a ball screw; a piezoelectric ceramic drives a flexible hinge to realize medium and low frequency reciprocating motion in the tensile axial direction of a test piece in order to realize fatigue loading; and an optical microscope dynamically monitors the test process in order to realize in situ observation. The test system has the advantages of reliable principle, important scientific meaning, good application values, and accurate test and analysis of the relationship among mechanical performances of a test piece material, the microstructure of the material and the deformation damage mechanism in high temperature environment.

Description

technical field [0001] The invention relates to the technical field of scientific instruments and material testing, in particular to a high-temperature in-situ tension-fatigue testing system and a testing method thereof. It is used to accurately detect the mechanical properties of the specimen in high temperature environment and the correlation law between its microstructure and deformation damage mechanism. Background technique [0002] The application of in-situ testing technology has played a role in promoting the development of materials science. In the process of material testing, the microscopic deformation and damage of materials under load are monitored dynamically through optical microscopes and other instruments, which can reveal various materials and their properties more deeply. The micro-mechanical behavior of its products, the damage mechanism and the correlation law between the material properties and the applied load. [0003] It is well known that the m...

AI Technical Summary

Problems solved by technology

[0004] At present, the existing high-temperature tensile equipment cannot perform tensile-fatigue composite load tests in high-temperature environments, and cannot fully monitor the microscopic deformation and damage of materials under load. Therefore, the development of high-temperature in-situ tensile-fatigue The test system is of great significance to the study of the mechanical properties of materials under tensile-fatigue composite loads and the deformation and damage mechanisms of materials under different temperature fields

Images