Hydrogen-induced micromechanical property evolution of duplex stainless steel based on nanoindentation
In this paper,the hydrogen-induced micromechanical property evolution of ferritic-austenitic duplex stainless steel was studied by nanoindentation and in situ hydrogen-charging method.The 2205 duplex stainless steel was selected as the research object in experiments,during which the nanohard-ness variation of ferrite and austenite was mainly analyzed,based on the obtained nanoindentation load-displacement curves under different hydrogen-charging time.The results show that the nanohardness of ferrite and austenite increases with hydrogen-charging time,presenting the hydrogen-induced hard-ening performance.After 3 hours hydrogen charging,the hydrogen-induced hardening effect of the two phases reaches saturation state,and the degree of increased nanohardness of austenite is higher than that of ferrite.The results show the hydrogen-induced hardening difference of ferrite and austen-ite,and demonstrate the research advantages of nanoindentation method in terms of characterizing hy-drogen damage in the micro-scale.
国家科技期刊平台
NSTL
万方数据
