EFFECT OF PHOSPHORUS ON SOLIDIFICATION,ELEMENT SEGREGATION AND η-PHASE PRECIPITATION IN GH 761 ALLOY

Acta Metall Sin

1995, Vol. 31

Issue (8): 346-350 DOI:

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EFFECT OF PHOSPHORUS ON SOLIDIFICATION,ELEMENT SEGREGATION AND η-PHASE PRECIPITATION IN GH 761 ALLOY

SUM Wenru;GUO Shouren; GUO Jianting;LU Dezhong;HU Zhuangqi (Institute of Metal Research;Chinese Academy of Sciences;Shenyang 110015)

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SUM Wenru;GUO Shouren; GUO Jianting;LU Dezhong;HU Zhuangqi (Institute of Metal Research;Chinese Academy of Sciences;Shenyang 110015). EFFECT OF PHOSPHORUS ON SOLIDIFICATION,ELEMENT SEGREGATION AND η-PHASE PRECIPITATION IN GH 761 ALLOY. Acta Metall Sin, 1995, 31(8): 346-350.

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Abstract The effects of phosphorus content on solidification process, segregation of elements and formation of η-phase in GH 761 alloy were studied by using metallography and electron microprobe.It was found that phosphorus segregates markedly in interdendritic area and lowers extremely the final solidification temperature of the alloy. It aggravates the segregation of Ti and Ni, and relieves the segregation of Mo, B, S and Si.The results also showed that phosphorus obviously enhances the formation of η-phase,but lowers the precipitated temperature of this phase.SUN Wenru, Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110015

Key words: solidification segregation η-phase superalloy

Received: 18 August 1995

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1995/V31/I8/346

1王景唐,陈秋,于永田,李谷松．金属学报,1985;21:A4772ChenC,ThompsonRG,DavisDW．In:LoriaEAed．,Superalloy718,625andVariousDerivatives,Pittsburgh:TMS．1991:3373宋余九．金属的晶界与强度．西安:西安交通大学出版社,1987:484郭守仁,卢德忠．金属学报,1991;27:A421

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