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)
Cite this article:
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.
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.
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