Micro-nano indentation test method suitable for complex curved surface

Abstract

The invention relates to a micro-nano indentation test method suitable for a complex curved surface, and belongs to the technical field of material micro-mechanical property test. According to the method, the surface topography of a material with the complex curved surface is scanned based on a three-dimensional contourgraph, surface topography information of the material is obtained, the inclination angle of a plane where a test piece is located is adjusted to rapidly find an area suitable for indentation test, indentation test is then carried out the area, and the material does not need cutting, grinding and polishing of an original process. The problems that there is a prefabricated processing hardening defect of the surface of the test piece and test piece preparation is tedious and complex in existing leveling of the micro-nano indentation test piece are solved. Compared with the prior art, the method of the invention has the advantages of saving test time, being high in materialsurface performance retentivity and the like, being simple in operation and easy to control, and having a wide application prospect in multiple fields.

Description

technical field [0001] The invention relates to the technical field of material micromechanical performance testing, in particular to a micro-nano indentation test method suitable for complex curved surface surfaces, which is used for testing micro-nano indentation responses of sample materials with complex curved surface structures . Background technique [0002] The micro-nano indentation test technology measures the hardness, elastic modulus and creep properties of the material by parallel measurement of the indentation load value and indentation deformation of the hard indenter with a specific tip geometry indented into the surface of the test piece It is the mainstream method for testing the mechanical properties of material surfaces. However, most of the current micro-nano indentation testing techniques are only tested on specimens with a flat surface. In order to obtain a flat test surface, the material needs to be processed by cutting, grinding, and polishing. This ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a micro-nano indentation test method suitable for complex curved surfaces, which solves the prefabricated work hardening defect on the surface of the test piece in the flattening process of the micro-nano indentation test piece existing in the prior art , The preparation of test pieces is cumbersome and complicated, the test efficiency is low, and the flexibility is poor, etc.

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