摘要
为了研究Ta-10W合金在高温下的塑性变形机制,对再结晶状态的Ta-10W合金棒材在1000～2000℃进行了高温力学性能测试后,对该合金在各个高温下形成的拉伸断口进行了研究分析。研究表明:Ta-10W合金从1000～2000℃的高温塑性变形呈现出金属在高温下变形的一般规律:随着温度的升高,Ta-10W合金的塑性变形机制由以滑移为主的变形机制向以晶界滑动和转动为主的变形机制转变;该合金在高温变形中存在着加工硬化和动态回复或再结晶两个相反的过程,且动态再结晶对塑性的贡献高于动态回复。
To research the plastic deformation mode of Ta-10W alloy at high temperature,the mechanical properties of the recrystallized Ta-10W rod at high temperature ranging from 1000 ℃ to 2000 ℃ were tested,and the fractographic features of fractures formed at various high temperatures were analyzed.The analysis showed that the plastic deformation mode of Ta-10W alloy accorded with general law of metal plastic deformation at high temperature.The plastic deformation mode of Ta-10W alloy transformed from slipping mode to grain boundary gliding and turned with increasing test temperature.Two contrary courses of work-hardening and dynamic recovery or dynamic recrystallization existed at high temperature plastic deformation,and dynamic recrystallization had much influence on plasticity than dynamic recovery.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2007年第4期434-439,共6页
Chinese Journal of Rare Metals
关键词
Ta-10W合金
高温断口分析
晶界滑动
动态回复和再结晶
塑性变形
Ta-10W alloy
high temperature fracture analysis
grain boundary glide
dynamic recovery and recrystallization
plastic deformation
