TiAl+Sb合金蠕变性能的研究  

The Study on the Creep Properties of TiAl+Sb Alloy

作　　者：欧文沛[1] 黄伯云[1] 贺跃辉[1] 周科朝[1] 曲选辉[1] 

机构地区：[1]中南工业大学,长沙410083

出　　处：《热加工工艺》1997年第3期12-14,共3页Hot Working Technology

基　　金：国家"八六三"高技术计划

摘　　要：研究了TiAl＋Sb合金的蠕变性能．试验结果表明，该合金在760℃存在着明显的蠕变三个阶段．应力常数n在低应力区和高应力值的区不同，720～800℃范围内，激活能Qc值较大的变化，表明了蠕变机制的改变和蠕变过程的复杂性。金相表明，变形试样中存在动态再结晶现象．The study had been carried out on the creep properties of TiAl+Sb alloy. The results showed that there were three distinct creep stages for the alloy in 760℃. The difference of stress exponent n in low stress and highstress regions,the greater cbange of creep activation energy Qc between 72O℃ and 800℃ indicated that the transfor-mation of creep mechanism and the complexity for creep process. Dynamic recrystallization existed in the creep speci-mens by analyzing the metallograph.

关 键 词：蠕变 动态再结晶 钛铝合金 

分 类 号：TG146.23[一般工业技术—材料科学与工程]