全层状TiAl合金室温拉伸性能的影响因素  

Factors Affecting the Room Temperature Tensile Properties of TiAl Alloys with Fully Lamellar Microstructures

作　　者：唐建成[1] 贺跃辉[1] 刘文胜[1] 周科朝[1] 张俊红[1] 鲁世强[1] 黄伯云[1] 

机构地区：[1]中南大学,湖南长沙410083

出　　处：《稀有金属材料与工程》2003年第3期209-212,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(59895150);国家"863"计划基金(715-005-0040)资助项目

摘　　要：研究了显微组织和应变速率对全层状Ti-47Al-2Cr(at%)合金室温拉伸性能的影响。结果表明:全层状TiAl基合金的室温拉伸强度和室温延伸率随晶团尺寸和层片间距的减小而提高;其室温拉伸强度随应变速率的加快而提高;而应变速率对其室温延伸率的影响与显微组织相关,低延性全层状TiAl基合金的室温延伸率对应变速率不敏感,而高延性全层状TiAl基合金的室温延伸率对应变速率敏感,并随应变速率的加快而提高。The effects of the microstructure and the strain rate on the room-temperature tensile properties of Ti-47Al-2Cr(at%) with fully lamellar microstructures were investigated. It is shown that the room-temperature tensile strength and. ductility increase with the decrease of colony size and lamellar spacing. The room-temperature tensile strength increases with the increase of strain rate: The room-temperature ductility of low ductility alloy is not sensitive to strain rate, but the ductility of high ductility alloy is sensitive and increases with the increase of the strain rate.

关 键 词：TIAL合金 室温拉伸性能 显微组织 应变速率 

分 类 号：TG146.2[一般工业技术—材料科学与工程]