YANG Wangyue ZHA NG Jishan CHEN Guoliang Beijing University of Science and Technology
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Beijing
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ChinaTIAN Shusen GENG Qingquan Fushun Steel Works
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Fushun
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Liaoning
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China
金属学报(英文版)
The fatigue-creep interaction behaviour of superalloy GH698 with different grain sizes has been studied at 700℃.The results show that three zones,F,C and FC,can be distinguished at the fatigue-creep interaction curves.In zones FC and C,the presence of alternative stresses inhibits the creep deformation process therefore delays the fracture of the alloy.This effect will be enhanced by grain refining.However,in zone F,grain refining exhibits an inverse ef fect under large alternative stresses.
关键词:
Ni-base alloy
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