Modelling the optimum grain size on the low cycle fatigue life of a Ni based superalloy in the presence of two possible crack initiation sites

被引：140

作者：

Alexandre, F

Deyber, S

Pineau, A

机构：

[1] ENSMP, Ctr Mat Pierre Marie Fourt, UMR 7633, CNRS, F-91000 Evry, France

[2] SNECMA Moteurs, Dept Mat & Proc Unit YDOM3, F-77550 Moissy Cramayel, France

来源：

SCRIPTA MATERIALIA | 2004年 / 50卷 / 01期

关键词：

nickel alloy; low cycle fatigue; forging; grain refining;

D O I：

10.1016/j.scriptamat.2003.09.043

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

LCF experiments, in situ tensile tests and small fatigue crack growth rate measurements on different heats of Inconel 718 alloy with widely different grain sizes have been performed. A fatigue life prediction model including a transition in the crack initiation mechanism (particle/Stage I) is identified. This model is essentially based on Tanaka and Mura model [J Appi Mech 48 (1981) 97] for Stage I initiation and Tomkins model [Philos Magazine 18 (1981) 1041] for fatigue crack growth rate. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：25 / 30

页数：6

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