基于纳米压痕试验的氢致双相不锈钢微力学性能变化
Hydrogen-induced micromechanical property evolution of duplex stainless steel based on nanoindentation
陶平 1刘红梅 2彭剑 1刘雪东1
作者信息
- 1. 常州大学 机械与轨道交通学院,江苏 常州 213164;江苏省绿色过程装备重点实验室(常州大学),江苏常州 213164
- 2. 常州大学 机械与轨道交通学院,江苏 常州 213164;江苏省绿色过程装备重点实验室(常州大学),江苏常州 213164;江苏梅兰化工有限公司,江苏泰州 225300
- 折叠
摘要
通过纳米压痕方法对氢致铁素体-奥氏体双相不锈钢中微观力学性能变化行为进行研究,试验选用2205双相不锈钢为研究对象,通过不同充氢时间下获得的铁素体相和奥氏体相的压痕载荷-位移曲线,分析了铁素体相和奥氏体相的纳米硬度变化规律.结果表明,铁素体相和奥氏体相的纳米硬度随充氢时间的增加而增加,表现出氢致硬化的现象,充氢3h后两相的氢致硬化效果基本达到饱和状态,其中奥氏体相的氢致硬化程度明显高于铁素体相.研究结果揭示了铁素体相和奥氏体相氢致硬化规律的差异,并论证了纳米压痕方法在微观力学氢损伤方面的研究优势.
Abstract
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.
关键词
双相不锈钢/氢脆/纳米压痕/纳米硬度Key words
duplex stainless steel/hydrogen embrittlement/nanoindentation/nanohardness引用本文复制引用
基金项目
国家自然科学基金青年科学基金项目(52205142)
江苏省高等学校基础科学研究面上资助项目(22KJB460012)
江苏省自然科学基金资助项目(BK20210854)
江苏省高校自然科学基金资助项目(20KJB470009)
出版年
2024
国家科技期刊平台
NSTL
万方数据