摘要
讨论了γＴｉＡｌ合金显微组织与蠕变性能的关系，并用ＰＳＴ（ＰｏｌｙｓｙｎｔｈｅｔｉｃａｌｙＴｗｉｎｎｅｄＣｒｙｓｔａｌ，简称ＰＳＴ晶体）晶体研究了片层界面相对于外力轴取向对ＴｉＡｌ合金蠕变性能的影响．认为影响该合金蠕变性能的主要显微组织参数是片层取向，γ体积分数，晶粒尺寸，片层宽度以及晶界形貌，并分析了它们与蠕变性能的关系．提出了如何控制以上显微组织参数，使得该合金具有最佳蠕变抗力．
The relationship between microstructure and creep behavior of γ TiAl alloys was analyzed and discussed, and the effect of the orientation of lamellar boundaries with respect to loading axis on the creep behavior of TiAl alloy with fully lamellar structure was studied by using TiAl PST crystals. It is indicated that the primary microstructure parameters which have important influences on the creep behavior are lamellar orientations with respect to loading axis, volume faction of γ grains, lamellar grain size, lamellar width and grain boundary morphology. The way to get high creep resistance by microstructure control has been suggested.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1998年第6期734-737,共4页
Journal of Beijing University of Aeronautics and Astronautics
关键词
钛添加合金
蠕变强度
显微结构
titanium additions
creep resistance
microstructure
