摘要
选用980℃时效温度、分别对[001]取向标准热处理后的第2代单晶高温合金DD6进行100,200,300,400,600,800及1000h的长期时效,研究了合金的显微组织与持久性能。结果表明:DD6合金980℃/1000h长期时效后,无TCP相析出,组织稳定性优良;DD6合金980℃/1000h长期时效后980℃/248.2MPa的持久寿命高于180h,合金具有优异、稳定的持久性能。
The microstructures and stress rupture properties of the second generation single crystal superalloy DD6 with [001 ] orientation were investigated after the full heat treatments were performed and aged at 980 ℃ for 100, 200, 300, 400, 600, 800 and 1000 h, respectively. The results show that topologically close packed （TCP） phase is not found in DD6 alloy aged at 980 ℃ for 1000 h. It indicates that DD6 has good microstructure stability after long-term aging at 980℃. The stress rupture lives of DD6 alloy aged for 1000 h are more than 180 h at 980℃/248.2 MPa and DD6 alloy exhibits excellent stability of the stress rupture properties after long-term aging at 980℃.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第10期1784-1787,共4页
Rare Metal Materials and Engineering
关键词
DD6
单晶高温合金
长期时效
持久性能
DD6
single crystal superalloy
long term aging
stress rupture properties
作者简介
李嘉荣，男，1962年生，博士，研究员，北京航空材料研究院先进高温结构材料国防科技重点实验室，北京100095，电话：010-62496331，E-mail：jiarong．1i@biam．ac．cn
