加工表面完整性对GH33A高低周疲劳寿命的影响

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1991, Vol. 12 ›› Issue (10): 528-531.

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EFFECT OF SURFACE INTEGRITY ON LOW-CYCLE AND HIGH-CYCLE FATIGUE LIFE OF NICKEL-BASE SUPERALLOY GH33A

Huang Qi,Ren Jingxin, Zhang Juncheng

Northwestern Polytechnical University

Received:1989-12-15 Revised:1990-04-21 Online:1991-10-25 Published:1991-10-25

Abstract

Abstract: The effect of the surface roughness, the residual stresses and surface hardening created by cutting and grinding on high-cycle and low-cycle fatigue life of nickel-base superalloy GH33A at room and elevated temperature are studied. It is shown that under the condition of low-cycle fatigue, surface roughness is a main affecting factor and surface hardening has an unfavorable influence on fatigue life, while residual stresses can be neglected due to their relaxation under applied loads. The effect of surface integrity on low cycle fatigue is different from that on high-cycle fatigue.

Key words: machining surface integrity, nickel-base superalloy, fatigue life

Huang Qi;Ren Jingxin;Zhang Juncheng. EFFECT OF SURFACE INTEGRITY ON LOW-CYCLE AND HIGH-CYCLE FATIGUE LIFE OF NICKEL-BASE SUPERALLOY GH33A[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1991, 12(10): 528-531.

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EFFECT OF SURFACE INTEGRITY ON LOW-CYCLE AND HIGH-CYCLE FATIGUE LIFE OF NICKEL-BASE SUPERALLOY GH33A

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