摘要
利用EBSD和金相分析了电真空用0.5 mm厚冷轧退火钼薄板的晶粒取向及显微组织,并探讨其与力学性能的关联性。结果表明,加工性能优异的钼薄板中晶粒取向分布相对较弱、较漫散,主要包含α线和γ线织构,其中α线织构的最大组分为旋转立方{001}<110>,并含有一定量{112}<110>;晶粒多为沿RD方向且平行轧面顺序排列的"扁云片"状;有相对较少的θ>50°大角度晶界;这使得RD、TD及45°-RD方向的屈强比和延伸率均较高,延伸率各向异性较低,强塑性匹配良好。
The crystallographic orientation and microstructure of the 0.5 mm thick cold-rolled annealed molybdenum sheets for vacuum electron devices were analysed by electron back-scattered diffraction(EBSD) and metallography, and the correlation with mechanical performance was discussed. The results show that the molybdenum sheets with excellent processability have some characteristics: grain orientation distribution which is relatively weaker and more diffused, mainly consists of α-fiber and γ-fiber texture. In the α-fiber texture, rotation cubic {001}<110> is the maximum component, and an amount of {112}<110> exists. Observed microstructures are mostly flat cloud-flake grains arrayed orderly along rolling direction and paralleled to rolling surface. Relatively less high-angle boundaries with θ>50° are detected. Therefore, the Mo sheets show higher yield ratio and elongation, and weaker elongation anisotropy in RD, TD, and 45°-RD directions, i.e. excellent strength and toughness matching.
作者
周增林
李艳
谢元锋
惠志林
何学良
王伏
付霄荧
Zhou Zenglin;Li Yan;Xie Yuanfeng;Hui Zhilin;He Xueliang;Wang Fu;Fu Xiaoying(GRIMAT Engineering Institute Co.Ltd,Beijing 101407,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2019年第8期2502-2506,共5页
Rare Metal Materials and Engineering
基金
国家重点研发计划专项项目（2017YFB0306000）
民口配套科研项目（2017-104)
关键词
钼
EBSD
晶粒取向
晶界取向差
力学性能
molybdenum
EBSD
crystallographic orientation
grain boundary misorientation
mechanical performance
