EFFECT OF P CONTENT ON MECHANICAL PROPERTIES OF FINE-GRAINED GH761 ALLOY

被引：0

作者：

Yang Shulin ^{[1
,2
]}

Sun Wenru ^{[1
]}

Wang Jianxi ^{[2
]}

Wang Keliang ^{[2
]}

Guo Shouren ^{[2
]}

Hu Zhuangqi ^{[1
]}

机构：

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

[2] Shenyang Liming Aeroengine Grp Corp, Shenyang 110043, Peoples R China

来源：

ACTA METALLURGICA SINICA | 2009年 / 45卷 / 07期

关键词：

GH761; alloy; P; grain refining; mechanical property; BASE SUPERALLOY; STRESS RUPTURE; PHOSPHORUS;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Effect of P content on the microstructure and mechanical properties of fine-grained GH761 alloy was studied. The results showed that no obvious effect on the tensile properties of fine-grained GH761 alloy was observed when P content in GH761 alloy was below 0.040% (mass fraction). However, P influenced the stress rupture and creep properties greatly. The peak value of the life at 650 degrees C and 690 MPa appeared around 0.023%P. In comparison with that of the alloy with 0.0007%P, the life increased more than 2 times. At the same time, the creep rate of the alloy with 0.023%P is also the lowest in all of alloys. P is beneficial to the mechanical properties of fine-grained GH761 alloy by improving the precipitation at grain boundaries and impeding the disclocation movement. The overall properties of CH761 alloy can be improved by grain refining and appropriate amount of P addition.

引用

页码：815 / 819

页数：5

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