Study On Original Position Statistical Distribution & Characterization Technique Of Fluid Micro-explored Strain

Material hardness is the ability of material to resist elastic-plastic deformation.Hardness testing method is an indispensable means to test the mechanical properties of metal materials.The traditional hardness testing is to measure the deformation after unloading by pressing the indenter into the material surface in a quasi-static way.Traditional macro-hardness measurement and nanoindentation technology have limitation and continuous and high-throughput measurement can not achieved.In this paper,the morphological difference detection of microstructure of materials under isostatic pressure and hardness are studied and analyzed.The qualitative and quantitative relationship between the differential response of strain of materials under flexible micro-detection and hardness is established.A new method of characterizing of the hardness properties on different microstructure of materials by using fluid micro-explored strain detection technology is proposed.The high-throughput characterization of micro-scale continuous plastic deformation by mapping with microstructure and hardness was realized.The continuous mapping statistical analysis of microstructure,hardness and composition in macro-scale was also realized.Finally,a new original position statistical distribution analysis technology of fluid micro-explored strain at macro-meso-micro multi-scale in high-throughput was established.The continuous high throughput measurement of strain hardness of microstructures in laser additive gradient materials of stainless steel and high chromium cast iron was completed.The conclusion and experiment data in this paper show that there is a significant correlation between the hardness of fluid micro-explored strain and macro-Vickers hardness,micro-Vickers hardness and nanoindentation hardness.Finally,the high-throughput original position statistical distribution analysis of composition,structure and hardness of materials is achieved,it provides a feasible technical method for continuous testing of high-throughput hardness properties in Material Genome Initiative research.