Acta Metall Sin  1996, Vol. 32 Issue (9): 926-932    DOI:

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EFFECTS OF CARBON AND YTTRIUM ON 500℃ AGING EMBRITTLEMENT OF ALLOY Fe-15Cr-4Al

LI Bei; WU Shuangxia; TENG Yun; LIU Cuilan; YAN Yuxin; ZHAO Zengqi; WU Hong (Baotou Research Institute of Rare Earth; Ministry of Metallurgical Industry; Baotou 014010)

LI Bei; WU Shuangxia; TENG Yun; LIU Cuilan; YAN Yuxin; ZHAO Zengqi; WU Hong (Baotou Research Institute of Rare Earth; Ministry of Metallurgical Industry; Baotou 014010). EFFECTS OF CARBON AND YTTRIUM ON 500℃ AGING EMBRITTLEMENT OF ALLOY Fe-15Cr-4Al. Acta Metall Sin, 1996, 32(9): 926-932.

Abstract References Related Articles Recommended Metrics Download:  PDF(596KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The embrittlement kinetics of alloy Fe-15Cr-4Al during aging at 500℃ was determined and the changes in microstructure and fracture behavior after aging were investigated by internal friction, TEM, EPMA and SEM. It was found that the aging embrittlement consisted of two stages. In the first stages (0-100 h), the rapid precipitation of carbide around grain boundaries of α-phase played an important role. In the second stage (100-1000 h), the action of Cr rich α'-phase precipitated uinformly in α-phase became more important. For alloys Fe-15Cr-4Al-Y with 0.2 and 0.4% Y, the EPMA results indicated that the carbon atoms were captured by Y_2Fe_(17) phase in these alloys, and no any carbide precipitation could be detected in the aged alloys by TEM, which is the reason why the Fe-Cr-Al-Y alloys have high plasticity during aging at 500℃ for 1000 h. Key words:  Fe-Cr-Al alloy      aging embrittlement      carbon      yttrium      Received:  18 September 1996      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/Y1996/V32/I9/926 1FisherRM,DulisEJ,CarrollKG．TransAIME,1953;197:6902WilliamsRO,PaxtonHW．JIronSteelInst．1957;185:3583WilliamsRO．TransMetallSocAIME,1958,2124974BlackburnMJ,NutlingJ．JIronSteelInsi,1964,202:6105NicholTJ,DattaA,AggenG．MatallTrans,1971,2:5116GolovinIS,SarrakVI,SuvorovaSO．PhysMetMetallogr,1984,57(5):1807GolovinIS,SarrakVI,SuvorovaSO,ChevakinaMI．PhysMetMetallogr,1985,60(6):1468GolovinIS,SarrakVI,SuvorovaSO,DmitriyevVB．PhysMetMetallogr,1987,64(3):1159GolovinIS,SarrakVI,SpasskiyMN,SuvorovaSO．PhysMetMetallogr,1991,69(6):13810GoroknovaNA,SuvorovaSO,SarrakVI,ZhukovLL．PhysMetMetallogr,1983;56(2):6211SpearWS,PolonisDH．MetallMaterTrans,1994,25A:113512LiBei,WuShuangxia,LiDianchen,MaRuzhang．ActaMetallSin,1993;6A:73Z [1] LI Xiaohan, CAO Gongwang, GUO Mingxiao, PENG Yunchao, MA Kaijun, WANG Zhenyao. 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