钨材料中缺陷的形成及演化规律
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罗来马, 魏国庆, 刘祯, 朱晓勇, 吴玉程
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Formation and Evolution of Defects in Tungsten Materials
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LUO Laima, WEI Guoqing, LIU Zhen, ZHU Xiaoyong, WU Yucheng
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图6 W中的位错类型及迁移特性[100,119]
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Fig.6 Types and migration characteristics of dislocations in W
(a) characteristics of dislocations in a W grain under the same zone axis of z = [ˉ111] but different g vectors conditions[100] (a1-a3) left: different two-beam bright-field TEM images of dislocation structures (a1-a3) right: the Burgers vectors of dislocations are highlighted using different colors. Black arrows indicate the edge or mixed-type dislocation based on the criterion of geometrical orientation relationship between a dislocation line and its Burgers vector (b) TEM images of cold-rolled tungsten in the as-rolled, 1200 oC annealed, and 1400 oC annealed conditions[119] (b1-b3) overview (b4-b6) dislocation structure (b7-b9) grain boundaries (c1) deformation velocity of W with screw or edge dislocations as a function of dislocation density[119] (c2) deformation velocity of W with screw dislocations as a function of temperature[119] (c3) deformation velocity of W with edge dislocations as a function of temperature[119]
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