EFFECT OF GRAIN REFINING ON FATIGUE-CREEP INTERACTION BEHAVIOURIN A Ni-BASE SUPERALLOY

Acta Metallurgica Sinica (English Letters) ›› 1989, Vol. 2 ›› Issue (1): 47-50.

• Research paper • Previous Articles Next Articles

EFFECT OF GRAIN REFINING ON FATIGUE-CREEP INTERACTION BEHAVIOURIN A Ni-BASE SUPERALLOY

YANG Wangyue ZHA NG Jishan CHEN Guoliang Beijing University of Science and Technology,Beijing,ChinaTIAN Shusen GENG Qingquan Fushun Steel Works,Fushun,Liaoning,China

Received:1989-02-25 Revised:1989-02-25 Online:1989-02-25 Published:2009-10-10

Abstract

Abstract: 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.

Key words: Ni-base alloy, GH698, grain refining, fatigue, creep

YANG Wangyue ZHA NG Jishan CHEN Guoliang Beijing University of Science and Technology,Beijing,ChinaTIAN Shusen GENG Qingquan Fushun Steel Works,Fushun,Liaoning,China. EFFECT OF GRAIN REFINING ON FATIGUE-CREEP INTERACTION BEHAVIOURIN A Ni-BASE SUPERALLOY[J]. Acta Metallurgica Sinica (English Letters), 1989, 2(1): 47-50.

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EFFECT OF GRAIN REFINING ON FATIGUE-CREEP INTERACTION BEHAVIOURIN A Ni-BASE SUPERALLOY

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