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.
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)
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。
