The influence of finish machining depth and hot isostatic pressing on defect distribution and fatigue behaviour of selective electron beam melted Ti-6Al-4V

被引：22

作者：

Childerhouse, Thomas ^{[1
,2
]}

Hernandez-Nava, Everth ^{[1
]}

Tapoglou, Nikolaos ^{[3
]}

M'Saoubi, Rachid ^{[4
]}

Franca, Luiz ^{[5
]}

Leahy, Wayne ^{[5
]}

Jackson, Martin ^{[1
]}

机构：

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

[2] Univ Sheffield, Adv Mfg Res Ctr Boeing, Ind Doctoral Ctr Machining Sci, Rotherham S60 5TZ, S Yorkshire, England

[3] Univ Sheffield, Adv Mfg Res Ctr Boeing, Rotherham S60 5TZ, S Yorkshire, England

[4] Seco Tools AB, Mat & Technol Dev, SE-73782 Fagersta, Sweden

[5] Element Six Global Innovat Ctr, Fermi Ave, Harwell OX11 0QR, Berks, England

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 147卷

基金：

英国工程与自然科学研究理事会;

关键词：

Additive manufacturing; Near net shape manufacturing; Powder metallurgy; Titanium alloys;

D O I：

10.1016/j.ijfatigue.2021.106169

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Porosity related defects within metal additive manufactured components has made it challenging to certify their use in fatigue critical applications. In this study, the fatigue behaviour of selective electron beam melted (SEBM) Ti-6Al-4V specimens following hot isostatic pressing (HIP?ing) and finish machining has been investigated. Employing a sufficient material removal depth during machining was shown to significantly improve fatigue performance. This was attributed to be a direct result of removing material rich in lack-of-fusion defects, concentrated in the sub-surface. HIP?ing was shown to enhance fatigue performance to a lesser degree, as the treatment was only effective at reducing gas porosity.

引用

页数：11

共 39 条

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