摘要
采用光学金相显微镜和透射电子显微镜，研究了经过１０４０℃，３×１０－４Ｓ－１，８２％等温锻造的Ｔｉ－３３Ａｌ－３Ｃｒ－０．５Ｍｏ合金在α＋γ两相区加热时，发生的显微组织转变。发现，当然变形是在α２／γ层片状晶团内的γ相板条上形成与层片方向平行的变形孪晶时，即发生γ相板条窄化现象，这种晶团则表现出高的显微组织结构的热稳定性。
The microstructural transformation of Ti-33Al-3Cr-05Mo alloy after being thermal-foregedat1040℃,3×10~ -4 S -1.82% and annealed at 1250℃,4h is investigated using optical micrography and TEM,and it is found that hot-deformed lamellae colonies show high thermal-stability if there are twinnedγ phase laths only in partalleled with the direction of the almellae,a set of γ phase laths with twinned γ phase laths is thus amalgamated into a wide lath to reduce the system energy,However,no γ phase grain is discovered to get recrystallized within the α/γ lamelae colony
出处
《材料科学与工艺》
EI
CAS
CSCD
1997年第4期70-73,共4页
Materials Science and Technology
基金
国家86.3高技术研究计划基金
关键词
孪晶
层片状界面
界面
钛合金
TiAl based alloy
twin
lamellar colony
grais boundary
thermal-mechanical treatment
