Acta Metall Sin  1994, Vol. 30 Issue (7): 321-326    DOI:

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FORMATION AND ROTATION OF γ' RAFTS IN Ni-BASE SINGLE CRYSTAL SUPERALLOY NASA IR100

GUO Xiping; FU Hengzhi (Northwestern Polytechnical University; Xi'an) ; SUNJiahua (Central Iron and Steel Research institute; Ministry of Metallurgical Industry; Beijing)(Manuscript received 12 July; 1993; in revised form 10 January; 1994)

GUO Xiping; FU Hengzhi (Northwestern Polytechnical University; Xi'an) ; SUNJiahua (Central Iron and Steel Research institute; Ministry of Metallurgical Industry; Beijing)(Manuscript received 12 July; 1993; in revised form 10 January; 1994). FORMATION AND ROTATION OF γ' RAFTS IN Ni-BASE SINGLE CRYSTAL SUPERALLOY NASA IR100. Acta Metall Sin, 1994, 30(7): 321-326.

Abstract References Related Articles Recommended Metrics Download:  PDF(476KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The formation of γ' rafts and their rotation in the necking zone during high temperature stress-rupture tests of NASA IR100 single crystal superalloy were investigated.It was found that γ' precipitates linked each other in the direction of perpendicular to the stress axis just after the beginning of the stress-rupture test. Perfect and regularγ' rafts formed when the stress-rupture test lasted for about 50 h. After observing the longitudinal sections of ruptured bars by SEM the γ' rafts in the necking zones were found to be not perpendicular to the stress axis, but rotated around the stress axis. The mechanisms of γ' raft formation and rotation were put forward in this paper.Correspondent: GUO Xiping, lecturer,State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072 Key words:  single crystal superalloy      high temperature stress-rupture deformation      γ' raft      NASA IR100      Received:  18 July 1994      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1994/V30/I7/321 1PearsonDD,LemkeyFD,KearBH．In:TienJKetal．eds．,Superalloys1980,MetalsPark,Ohio:ASM,1980:513-5202KhanT．In:BetzWetal．eds．,HighTemperatureAlloysforGasTurbinesandOtherApplications1986,Holland:D．ReidelPublishingCompany,1986:21-503MackayRA,EbertLJ．MetallTrans,1985;16A:19694MackayRA,NathalMV．NASA-TV-STBX88788,1986:1-375NathalMV,EbertJ．MetallTrans,1985;16A:18496胡赓祥,钱苗根．金属学,上海:上海科学技术出版社,1980:1177CaronP,HendersonPJ,KhanT,McLeanM．ScrMetall,1986;20:8758FredholmA,StrudelJL,In:GellMetal．eds．,Superalloys1984,NewYork,NY:AIME,1984:2119ArdellAJ,NicholsonRB,EshelbyJD．ActaMetall,1986;20:87510胡赓祥,钱苗根．金属学,上海:上海科学技术出版社,1980:26911MonikaFK,ThomasL．MetallTrans,1989;20A:1233J [1] ZHANG Jian, WANG Li, XIE Guang, WANG Dong, SHEN Jian, LU Yuzhang, HUANG Yaqi, LI Yawei. 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