In-situ tester for micromechanical property of material under combined tension and torsion

Abstract

The invention relates to an in-situ tester for the micromechanical property of a material under combined tension and torsion, and belongs to the field of precise instruments. The tester comprises a base, a tension and torsion loading unit, a test-piece clamping unit, and a displacement and loading force precision testing unit, wherein the torsion loading unit drives two-level worm wheel and worm driving mechanisms to apply a torsion load to one end of a moving clamp through a precision motor, so that the torsion load is applied to a tested test-piece sample; a fixed clamp end is arranged on a precision guide rail sliding block; one end of the moving clamp is provided with a precision tension and torsion sensor for used for detecting the tension and torsion born by a testing workpiece, and a motor encoder can detect the tension strain and torsion angle. The in-situ tester provided by the invention has the characteristics that the structure is compact and exquisite, the volume is small, the weight is light, in-situ testing in micro-nano precision for the micromechanical property of the material under combined tension and torsion can be realized, and a novel testing method is provided for analytical investigation of a material deformation damage mechanism under the serving approaching condition.

Description

technical field [0001] The invention relates to the field of precision instruments, in particular to an in-situ tester for microscopic mechanical properties of tensile-torsion composite load materials. Under the dynamic monitoring of various material performance characterization instruments (scanning electron microscope, optical microscope, Raman spectrometer, X-ray diffractometer, etc.), dynamic in-situ monitoring can be performed on the deformation damage mechanism and microstructure change law of the specimen material under load . The invention has good application prospects in the fields of iron and steel metallurgy, non-ferrous metals, semiconductor materials, advanced metals, national defense and military industry, aerospace and the like. Background technique [0002] The in-situ testing technology of material micromechanical properties is a cutting-edge technology developed in recent years, which has attracted great attention from governments and research ins...

AI Technical Summary

Problems solved by technology

At present, micro-nano torsional mechanical tests are mainly carried out in transmission electron microscope (TEM) and scanning electron microscope (SEM), both of which have very limited working chambers, and it is necessary to ensure the electromagnetic compatibility and Vacuum compatibility, it is these reasons that limit the rapid development of micro-nano tensile torsion mechanical testing technology

Overall, it is still a challenging task to study a micro-nano tensile-torsion composite mechanical testing device with high precision, large testing range, and low cost, and it is also an urgent task.

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