The effect of machining and induced surface deformation on the fatigue performance of a high strength metastable β titanium alloy

被引：38

作者：

Cox, A. ^{[1
]}

Herbert, S. ^{[1
]}

Villain-Chastre, J. -P. ^{[2
]}

Turner, S. ^{[3
]}

Jackson, M. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mat Sci & Engn, Sir Robert Hadfield Bldg,Mappin St, Sheffield S1 3JD, S Yorkshire, England

[2] Safran Landing Syst, Cheltenham Rd East, Gloucester GL2 9QH, Glos, England

[3] High Value Mfg Catapult, Regus Bldg,Blythe Valley Business Pk, Solihull B90 8AG, W Midlands, England

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2019年 / 124卷

基金：

英国工程与自然科学研究理事会;

关键词：

Crack formation; Low cycle fatigue; Titanium alloys; Milling; Subsurface damage; SUBSURFACE DEFORMATION; INTEGRITY; LIFE; BEHAVIOR; SLIP;

D O I：

10.1016/j.ijfatigue.2019.02.033

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Metastable beta titanium alloys such as Ti-5Al-5Mo-5V-3Cr (Ti-5553) are used for large aero-structural components. During processing these alloys are subject to costly machining operations. There is an industry demand to machine at improved metal removal rates (MRR) to meet increasing aircraft orders. To understand the effects of MRR on subsurface deformation and fatigue performance, fatigue coupons were end milled under two different industrial conditions. The surface roughness, residual stress and subsurface deformation was characterised and a custom four point bend fatigue testing was designed to determine the effect of MMR on cycles to failure. The study has demonstrated that an increase in MMR of 50% resulted in a LCF reduction of 57.37%. This was a direct result of increased subsurface damage and residual stresses.

引用

页码：26 / 33

页数：8

共 37 条

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