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| EFFECT OF PHOSPHORUS ON MECHANICAL PROPERTIES OF GH761 ALLOY |
| YANG Shulin; SUN Wenru; GUO Shouren;WEI Zhigang; YANG Hongcai; HU Zhuangqi |
| School of Materials & Metallurgy; Northeastern University; Shenyang 110004; Institute of Metal Research; The Chinese Academy of Sciences;Shenyang 110016 |
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Cite this article:
YANG Shulin; SUN Wenru; GUO Shouren; WEI Zhigang; YANG Hongcai; HU Zhuangqi. EFFECT OF PHOSPHORUS ON MECHANICAL PROPERTIES OF GH761 ALLOY. Acta Metall Sin, 2005, 41(12): 1249-1255 .
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Abstract When phosphorus content is below 0.040%, no obvious effect on the
tensile properties of GH761 alloy at room temperature and 650℃ was
observed. However, phosphorus influenced the stress rupture properties
of GH761 alloy greatly. The peak value of the rupture life at 650 ℃
and 637 MPa appeared at 0.023% phosphorus. At the point, the life
was longer than 970 h, more than 3 times of that when the phosphorus
content is 0.0007%. Phosphorus can prolong the rupture life of GH761
alloy by inhibiting the dislocation glide, increasing the intergranular
precipitation and blocking the diffusion of oxygen along gain boundaries.
However, excessive addition of phosphorus lowered the grain boundary
strength by deteriorating the grain boundary precipitation and causing the
precipitation of η-Ni3Ti, which shortened the rupture life of GH761 alloy.
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Received: 03 February 2005
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[1] Sun W R. Master Thesis, Institute of Metal Research, The Chinese Academy of Sciences, Shenyang, 1993 (孙文儒．中国科学院金属研究所硕士学位论文,沈阳, 1993)
[2] Cao W D, Kennedy R L. In: Loria E A, ed., Superalloys 718, 625, 706 and Various Derivatives, Warrendale, PA: TMS-AIME, 1994: 463
[3] Sun W R. PhD Thesis, Institute of Metal Research, The Chinese Academy of Sciences, Shenyang, 1996 (孙文儒．中国科学院金属研究所博士学位论文,沈阳, 1996)
[4] Hu Z Q, Sun W R, Guo S R. Acta Metall Sin (Engl Lett), 1996; 9: 443
[5] Sun W R, Guo S R, Lee J H, Park N K, Yoo Y S, Choe S J, Hu Z Q. Mater Sci Eng, 1998; A247: 137
[6] Xie X S, Liu X B, Dong J X. In: Loria E A, ed., Superal- loys 718, 625, 706 and Various Derivatives, Warrendale, PA: TMS-AIME, 1997: 531
[7] Zhu Y X, Zhang S N, Zhang T X, Zhang J H, Hu Z Q, Xie X S, Shi C X. In: Antolovich S D, ed., Superalloys 1992, Warrendale, PA: TMS-AIME, 1992: 145
[8] Meng X N, Sun W R, Guo S R, Lu D Z, Li N, Hu Z Q. Acta Metall Sin, 2004; 40: 613 (孟晓娜,孙文儒,郭守仁,卢德忠,李 娜,胡壮麒．金属学 报,2004;40:613) |
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