LCF BEHMIOUR OF DS ALLOY DZ17G AT HIGH TEMPERATURE

Acta Metall Sin

1998, Vol. 34

Issue (3): 278-282 DOI:

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LCF BEHMIOUR OF DS ALLOY DZ17G AT HIGH TEMPERATURE

LIAO Ebin; GUO Jianting; WANG Shuhe(Institute of Metal Research; The Chinese Academy of Scineces;Shenyang 110015)

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LIAO Ebin; GUO Jianting; WANG Shuhe(Institute of Metal Research; The Chinese Academy of Scineces;Shenyang 110015). LCF BEHMIOUR OF DS ALLOY DZ17G AT HIGH TEMPERATURE. Acta Metall Sin, 1998, 34(3): 278-282.

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Abstract Low cyclic fitigue (LCF) behaviour of a directionally solidified (DS) nickel-base superalloy at high temperature was studied in this paper. Its cyclic stress-strain curve and strain-life curve were obtained. Manson-Coffin equation was obtained through least-square procedure. By macro-and micro-scopy observation, it was discovered that cracks initiated predominantly at interior and near-surface defects. Once formed, cracks propagated transgranularly and normal to the loading direction.

Key words: directionally solidilication Ni-base superalloy high temperature LCF ocrack initiation dricroshinkage

Received: 18 March 1998

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1998/V34/I3/278

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##F278-279-280-281-282

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