A holistic approach to Thermo-Mechanical Fatigue phase angle effects for an aerospace nickel superalloy

被引：13

作者：

Gray, V ^{[1
,2
]}

Jones, J. P. ^{[2
]}

Whittaker, M. T. ^{[2
]}

Lancaster, R. J. ^{[2
]}

Pretty, C. J. ^{[2
]}

Williams, S. J. ^{[3
]}

机构：

[1] Queensland Univ Technol, Sci & Engn Fac, Sch Mech Med & Proc Engn, Brisbane, Qld 4000, Australia

[2] Swansea Univ, Inst Struct Mat, Swansea SA1 8EN, W Glam, Wales

[3] Rolls Royce PLC, Pob 31, Derby DE24 8BJ, England

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2022年 / 156卷

基金：

英国工程与自然科学研究理事会;

关键词：

Thermo-mechanical fatigue; Phase angle; Lifing; Modelling; LIFE PREDICTION; TMF LIFE; BEHAVIOR; TEMPERATURE; MECHANISMS; MAR-M247; DAMAGE;

D O I：

10.1016/j.ijfatigue.2021.106631

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Thermo-Mechanical Fatigue (TMF) is one of the most complex mechanical phenomena that couples creep, fatigue and oxidation. So far, developing simple empirical relationships like those that exist in isothermal equivalents have proven elusive. This work presents a study on the TMF behaviour of the aerospace nickel based superalloy RR1000 using TMF fatigue crack growth rates, strain controlled TMF results, studies of the fracture morphologies and empirical lifing models. This paper takes a holistic approach to TMF lifing, specifically focusing on the impact of phase angle. As a result, this work develops an elastic modulus normalisation technique that when a Coffin-Manson type relationship is applied, predicts life of material under interim TMF phase angles.

引用

页数：10

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