Conversion between Vickers hardness and nanohardness by correcting projected area with sink-in and pile-up effects  

作　　者：Youping LU Yue SU Wei GE Tengfei YANG Zhanfeng YAN Yugang WANG Songqin XIA 鲁又萍;苏悦;葛伟;杨腾飞;闫占峰;王宇钢;夏松钦(State Key Laboratory of Nuclear Physics and Technology,Center for Applied Physics and Technology,Peking University,Beijing 100871,People's Republic of China;College of Materials Science and Engineering,Hunan University,Changsha 410082,People's Republic of China;不详)

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology,Center for Applied Physics and Technology,Peking University,Beijing 100871,People's Republic of China [2]College of Materials Science and Engineering,Hunan University,Changsha 410082,People's Republic of China [3]不详

出　　处：《Plasma Science and Technology》2020年第6期188-199,共12页等离子体科学和技术（英文版）

基　　金：financially supported by the National Magnetic Confinement Fusion Energy Research Project of China(No.2015GB113000);National Natural Science Foundation of China(Nos.11675005,11935004);China Postdoctoral Science Foundation(No.2018M641093);the National Defense Nuclear Material Technology Innovation Center。

摘　　要：The Vickers hardness test has been widely used for neutron-irradiated materials and nanoindentation for ion-irradiated materials.Comparing the Vickers hardness and nanohardness of the same materials quantitatively and establishing a correlation between them is meaningful.In this study,five representative materials—pure titanium(Ti),nickel(Ni),tungsten(W),304 coarse-grained stainless steel(CG-SS)and 304 nanocrystalline austenitic stainless steel(NG-SS)—are investigated for comparison.The results show that the relationship between Vickers hardness and nanohardness does not conform to a mathematical geometric relationship because of sink-in and pile-up effects confirmed by finite element analysis(FEA)and the results of optical microscopy.Finally,one new method was developed by excluding the effects of sink-in and pile-up in materials.With this improved correction in the projected area of the Vickers hardness and nanohardness,the two kinds of hardness become identical.

关 键 词：Vickers hardness nanohardness CONVERSION 

分 类 号：TG115.5[金属学及工艺—物理冶金] TL34[金属学及工艺—金属学]