Transactions of Materials and Heat Treatment

Title：Influence of trace element carbon on properties for GH4169 alloy

Authors： Yuan Yingjing Liu Dong Wang Jianyan Wang Jianguo Zhao Xingdong Li Changyong Shi Yongzhao

Unit： Northwestern Polytechnical University AECC Shenyang Liming Aero Engine Co. Ltd.

KeyWords： carbon element GH4169 alloy yield strength creep properties JMatPro

ClassificationCode：TG132.3

year,vol(issue):pagenumber：2019,44(12):153-158

Abstract：

The properties of GH4169 alloy with different carbon contents were calculated by software JMatPro V7.0, and the influences of trace element carbon on mechanical and creep properties of GH4169 alloy were investigated. The results show that the carbon content has significant influence on the amount of γ″ phase, and with the increasing of carbon content, the content of γ″ phase decreases firstly until the carbon content reaches 0.01% and then increases. When the carbon content is up to 0.02%, the content of γ″ phase decreases again until the carbon content reaches 0.05% and then increases, and with the increasing of carbon content, the yield strength at room temperature decreases firstly until the carbon content reaches 0.01% and then increase. When the carbon content is up to 0.02%, the yield strength at room temperature decreases again and then increases, the minimum value exists when the carbon content reaches 0.05%. However, the trend of creep rates is contrary to that of the yield strength at room temperature, and with the increasing of carbon content, the creep rate increases firstly and then decreases when the carbon content is less than 0.02%. When the carbon content is more than 0.02%, the creep rate increases firstly and then decreases continually, and the maximum value occurs when the carbon content reaches 0.05%. Meanwhile, the creep rupture life is short, the creep property is not good, and the Young′s modulus increases with the increasing of carbon content.

Funds：

中央高校基本科研业务费专项资金项目（3102019 ZX004）

袁颖菁（1997-），女，硕士研究生 E-mail：yuanyingjing@foxmail.com 通讯作者：王建国（1987-），男，博士，助理研究员 E-mail:wjgnll@126.com

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