In-situ nano-indentation tester based on adjustable stretching-bending preload

Abstract

The invention relates to an in-situ nano-indentation tester based on an adjustable stretching-bending preload, and belongs to the field of electromechanical precision scientific instruments. The in-situ nano-indentation tester comprises an in-situ nano-indentation testing module, a stretching preload loading module and a bending preload loading module, wherein the in-situ nano-indentation testing module consists of a precision displacement / force loading unit and a load / displacement signal detection unit; the stretching preload loading module consists of a precision driving unit A, a precision transmission unit A, a load / displacement signal detection and control unit A and a clamping unit A; the bending preload loading module consists of a precision driving unit B, a precision transmission unit B, and a load / displacement signal detection and control unit B. The in-situ nano-indentation tester has the advantages of small size, compact structure and high testing precision; supplied test contents are rich; the deformation / displacement / load rate can be controlled; the in-situ nano-indentation tester can be arranged on carrying platforms of various main-stream electronic microscopic vacuum cavities and is compatible with imaging equipment; the application range is wide.

Description

technical field [0001] The invention relates to the field of mechatronic precision scientific instruments, in particular to an in-situ nano-indentation tester based on an adjustable tensile-bending preload. Background technique [0002] In-situ micro-nano mechanical testing technology refers to the process of testing the mechanical properties of specimen materials at the micro-nano scale, through imaging instruments such as electron microscopes, atomic force microscopes, or optical microscopes, to measure the microscopic deformation, damage, and damage of materials under load. It is a mechanical testing technique for dynamic monitoring of the whole process of failure and destruction. In the category of many nanomechanical tests, parameters such as elastic modulus, yield strength, tensile strength, flexural strength, flexural modulus, hardness, and shear modulus are the most important research objects in the testing of mechanical properties of materials. A variety of tes...

AI Technical Summary

Problems solved by technology

Compared with the single out-of-position test of the traditional mechanical testing machine, the present invention can realize in-situ composite test and observation of tensile bending indentation for macroscopic specimens with characteristic dimensions above centimeter level under the high-resolution microscopic imaging system, and solve the problem of Most of the existing in situ testing studies focus on the limitations of nanotubes, wires and thin film materials

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