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电真空用冷轧钼薄板晶粒取向与力学性能分析
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北京有色金属研究总院工程技术研究院

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TG 146.4

基金项目:

国家重点研发计划专项项目(2017YFB0306000)、民口配套项目


Analysis of Crystallographic Orientation and Mechanical Performance of Cold-rolled Molybdenum Sheets for Vacuum Electron Devices
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Institute of Engineering and Technology,General Research Institute for Nonferrous Metals

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    摘要:

    利用EBSD和金相分析了电真空用0.5mm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。

    Abstract:

    Crystallographic orientation and microstructure of the 0.5mm thick cold-rolled annealed molybdenum sheets for vacuum electron devices were analysed by electron back-scattered diffraction (EBSD) and metallography, and their correlation with mechanical performance was discussed. 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.

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周增林,李艳,谢元锋,惠志林,何学良,王伏,付霄荧.电真空用冷轧钼薄板晶粒取向与力学性能分析[J].稀有金属材料与工程,2019,48(8):2502~2506.[Zhou Zenglin, Li Yan, Xie Yuanfeng, Hui Zhilin, He Xueliang, Wang Fu, Fu Xiaoying. Analysis of Crystallographic Orientation and Mechanical Performance of Cold-rolled Molybdenum Sheets for Vacuum Electron Devices[J]. Rare Metal Materials and Engineering,2019,48(8):2502~2506.]
DOI:10.12442/j. issn.1002-185X.20180221

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  • 收稿日期:2018-03-13
  • 最后修改日期:2018-05-15
  • 录用日期:2018-05-15
  • 在线发布日期: 2019-09-05
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