Role of Rhenium in Single Crystal Ni-based Superalloys

被引：14

作者：

Jin, Tao ^{[1
]}

Wang, Wenzhen ^{[1
]}

Sun, Xiaofeng ^{[1
]}

Hu, Zhuangqi ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

THERMEC 2009, PTS 1-4 | 2010年 / 638-642卷

关键词：

Re; creep rupture property; dislocation; single crystal superalloy; CREEP STRENGTH; HEAT-TREATMENT; MICROSTRUCTURE; ADDITIONS; IMPROVEMENT;

D O I：

10.4028/www.scientific.net/MSF.638-642.2257

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of rhenium on the microstructure and mechanical properties of single crystal superalloys with a nominal composition of Ni-3Cr-12Co-1 Mo-6W-6Al-8Ta-0 1Hf-(0, 2, 4) Re has been studied. With the rise of rhenium content, the size of as-cast gamma particles becomes smaller. Rhenium addition elevates the incipient melting temperature and slows down the solid solution process Even after 2000h prolonged aging both at 950 degrees C and 1050 degrees C, no topologically close-packed phase precipitation is found in the three alloys with Re content up to 4%. Re retards the gamma coarsening and is beneficial to improving the stress rupture life. The deformation mechanisms together with the dislocation configuration have been studied and discussed.

引用

页码：2257 / 2262

页数：6

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