Acta Metall Sin  1998, Vol. 34 Issue (4): 378-383    DOI:

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HIGH TEMPERATUER LOW CYCLE FATIGUE OF DZ40M COBALT-BASE SUPERALLOY

JIANG Wenhui; YAO Xiangdong; GUAN Hengrong; HU Zhuangqi ( Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015)(Shenyang Polytechnic University; Shenyang 110023)

JIANG Wenhui; YAO Xiangdong; GUAN Hengrong; HU Zhuangqi ( Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015)(Shenyang Polytechnic University; Shenyang 110023). HIGH TEMPERATUER LOW CYCLE FATIGUE OF DZ40M COBALT-BASE SUPERALLOY. Acta Metall Sin, 1998, 34(4): 378-383.

Abstract References Related Articles Recommended Metrics Download:  PDF(2754KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Stress controlled low cycle fatigue tests on directionally solidified cobalt-basesuperalloy DZ40M have been conducted at 900℃ in ambient atmosphere. DZ40M superalloy exhibits high low cycle fatigue resistance. The fractography observation indicates that preferentially oxidized carbides at specimen surface act as crack initiation sites, and carbides in matrix have the retardation effect on crack propagation. Oxdation effect reduces alloy ductility, thatpromotes crack propagation. High temperature low cycle fatigue damage of DZ40M superalloyresults from the interaction of thermo--mechanical fatigue and enviromental okidation. Key words:  directional solidification      cobalt-base superalloy      low cycle fatigue      high temperature oxidation      fracture analysis      Received:  18 April 1998      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/Y1998/V34/I4/378 1姚向东,张静华,张志亚,李英敖,赵乃仁,管恒荣.胡壮麒.金属学报,1995;31:A320(Yao Xiangdong, Zhang Jinghua, Zhang Zhiya, Li Ying'ao, Zhao Nairen, Guan hengrong, Hu Zhuangqi.Acta Metall Sin, 1995; 31: A320) 2 刘培生. 中国科学院金属研究所硕士学位论文, 1996(Liu Peisheng. Master Thesis, Institute of Metal Research, The Chinese Academy of Sciences,Shenyang, 1996) 3 Merrick H F. Metall Trans, 1971; 5: 891 4 Antolovich S D, Liu S, Baur R. Metall Trans, 1981; 12A: 473 5 Sims C T. J Met, 1969; 21: 27 6 Reuchet J, Remy L. Mater Sci Eny, 1983; 58: 19 7 Vandermousen R F, Viatour P, Drapier J M, Coutsouradis D. Cobalt, 1974; (1): 6 8 Reuchet J, Remy L. 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