Approach for Obtaining Material Mechanical Properties in Local Region of Structure Based on Accurate Analysis of Micro-indentation Test

作     者：He Xue Jinxuan He Jianlong Zhang Yuxuan Xue He Xue;Jinxuan He;Jianlong Zhang;Yuxuan Xue

作者机构：School of Mechanical EngineeringXi’an University of Science and TechnologyXi’an710054China Xi’an Special Equipment Inspection InstituteXi’an710065China Department of Industrial and Manufacturing Systems EngineeringThe University of Hong KongHong Kong999077China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2021年第34卷第6期

页      面：147-158页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Supported by National Natural Science Foundation of China(Grant No.52075434) Key R&D Projects in Shaanxi Province(Grant No.2021KW-36) 

主　　题：Structural integrity assessment Micro-indentation test Numerical testing inversion analysis Local material mechanical property 

摘      要：The hot or cold processing would induce the change and the inhomogeneous of the material mechanical properties in the local processing region of the structure,and it is difficult to obtain the specific mechanical properties in these regions by using the traditional material tensile *** accurately get actual material mechanical properties in the local region of structure,a micro-indentation test system incorporated by an electronic universal material test device has been *** indenter displacement sensor and a group of special micro-indenter assemblies are estab-lished.A numerical indentation inversion analysis method by using ABAQUS software is also proposed in this *** on the above test system and analysis platform,an approach to obtaining material mechanical properties in the local region of structures is proposed and *** ball indentation test is performed and combined with the energy method by using various changed mechanical properties of 316L austenitic stainless steel under differ-ent *** investigated results indicate that the material mechanical properties and the micro-indentation morphological changes have evidently *** with the tensile test results,the deviations of material mechanical parameters,such as hardness H,the hardening exponent n,the yield strength σy and others are within 5%obtained through the indentation test and the finite element *** provides an effective and convenient method for obtaining the actual material mechanical properties in the local processing region of the structure.