中南大学学报（自然科学版）2012，Vol.43Issue(3)：883-889,7.
Ta-7.5％W在退火过程中的组织和织构演变
Microstructures and textures evolution of Ta-7.5％W during annealing process
摘要
Abstract
The organization and performance evolution of Ta-7.5%W at 1 050, 1 200 and 1 360 ℃ were investigated by microstructure observation, transmission electron microscope (TEM) and hardness tests, and the texture evolution was investigated by orientation density function (ODF). It was found that after 1 360 ℃ annealing the hardness decreases rapidly from HV 300 to HV 240, and the recovery recrystallization occurs. Ta-7.5%W is anisotropic; the dislocation substructure appears in {111} orientation and the deformation zone appears in {100} orientation. The main textures of cold-rolled Ta-W alloy are {001}<110>, {112}<110> and {110} (110) . As the annealing temperature is 1 200 ℃, the recrystallization nucleation is mainly through the migration of the subgrain boundary and the growth of the subgrain in {111} orientation, while the recrystallization nucleation is mainly through the rotation and polymerization of the subgrain in {100} orientation; the texture of {001} <110> increases and the texture of {112} <110> decreases. While annealing at 1 360 ℃, the texture of {001}<110> decreases rapidly, and the texture of {111} (112) increases.关键词
Ta-W合金/退火/再结晶/织构Key words
Ta-W alloy/ annealing/ recrystallization/ textures分类
矿业与冶金引用本文复制引用
左波,汪明朴,夏福中,王珊,陈畅,金鹏..Ta-7.5％W在退火过程中的组织和织构演变[J].中南大学学报（自然科学版）,2012,43(3):883-889,7.基金项目
国家高技术研究发展计划(“863”计划)项目(2006AA032517) （“863”计划）
湖南省自然科学基金资助项目(05JJ30095) （05JJ30095）
