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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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TG 146.4

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    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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[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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History
  • Received:March 13,2018
  • Revised:May 15,2018
  • Adopted:May 15,2018
  • Online: September 05,2019
  • Published: