TiAl合金铸态组织γ/α_2层片排列取向设计  

Design of γ/α_2 Lamellar Orientation in Cast TiAl Alloy Microstructures

作　　者：张继[1] 张建伟[1] 邹敦叙[1] 仲增墉[1] 张志宏[1] 

机构地区：[1]冶金部钢铁研究总院,北京100081

出　　处：《高技术通讯》1997年第3期4-7,共4页Chinese High Technology Letters

基　　金：863计划资助

摘　　要：根据Ti－Al相图，通过金相观察和X射线取向分析实验研究了TiAl合金铸态组织中γ／α2层片取向与凝固析晶路线及析晶路线与Ti／Al比的关系。根据用弹塑性力学方法按四点弯曲载荷－位移曲线计算得出的强度和塑性评价了V、Cr合金化的TiAl合金γ／α2层片取向与力学性能的关系。由此设计了有利于满足叶片类部件服役条件对材料力学性能要求的铸态组织γ／α2层片排列取向。The relationship between the cast γ/α2,lamellar orientations and the solidification crystallization paths and that between the crystallization pathes and Ti/Al atomic ratios are investigated through metallographic observation and X-ray crystal orientation determination. The relationship between the lamellar orientation and the mechanical properties is also experimentally analysed. Based on those results, the beneficial γ/α2 lamellar preferred orientation has been designed for the invest-casting blades.

关 键 词：TIAL合金 铸态组织 层片取向设计 高温结构材料 

分 类 号：TG146.23[一般工业技术—材料科学与工程]