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| EFFECT OF P CONTENT ON MECHANICAL PROPERTIES OF FINE--GRAINED GH761 ALLOY |
| YANG Shulin1;2; SUN Wenru1; WANG Jianxi2; WANG Keliang2; GUO Shouren1; HU Zhuangqi1 |
1) Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110016
2) Shenyang Liming Aero-engine Group Corporation; Shenyang 110043 |
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Cite this article:
YANG Shulin SUN Wenru WANG Jianxi WANG Keliang GUO Shouren HU Zhuangqi. EFFECT OF P CONTENT ON MECHANICAL PROPERTIES OF FINE--GRAINED GH761 ALLOY. Acta Metall Sin, 2009, 45(7): 815-819.
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Abstract 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 ℃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 GH761 alloy can be improved by grain refining and appropriate amount of P addition.
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Received: 08 January 2008
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| Fund: Supported by National Natural Science Foundation of China (Nos.50271072 and 50471083) |
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