Effect of second phase on grain growth of spray formed superalloy GH742y

被引：3
|
作者：
Xu Wenyong [1 ]
Li Zhou [1 ]
Yuan Hua [1 ]
Zhang Guoqing [1 ]
机构：
[1] Beijing Inst Aeronaut Mat, Natl Key Lab Sci & Technol Adv High Temp Struct M, Beijing 100095, Peoples R China
来源：
RARE METALS | 2011年 / 30卷
基金：
中国国家自然科学基金;
关键词：
superalloy; spray forming; grain growth; second phase; MICROSTRUCTURE;
D O I：
10.1007/s12598-011-0310-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of solution treatment on grain size and pinning effects of the second phase on grain growth in spray formed superalloy GH742y were investigated by OM, SEM, TEM, DSC, phase extraction and XRD. The results indicates that the limiting ultimate grain size is about 40 mu m. The equilibrium gamma' solvus temperature is determined to be about 1130 degrees C. Nb- and Ti-rich carbonitrides have good thermal-stability and could hardly change in their amount, size and morphology after solution treatment at 1250 degrees C solution treatment for 4 h. They inhibit the grain boundary migration and grain growth, by pinning the grain boundary.
引用
收藏
页码：392 / 395
页数：4
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