Fatigue performance improvement using laser shock peening in high strength ductile metallic materials

被引：0

作者：

George, S. L. ^{[1
]}

Tait, R. ^{[2
]}

Becker, A. ^{[2
]}

Carlisle, A. ^{[2
]}

机构：

[1] Univ Cape Town, Dept Mech Engn, Ctr Mat Engn, Rondebosch, South Africa

[2] Univ Cape Town, Dept Mech Engn, Cape Town, South Africa

来源：

JOURNAL OF THE SOUTHERN AFRICAN INSTITUTE OF MINING AND METALLURGY | 2025年 / 125卷 / 07期

关键词：

laser shock peening; compressive residual stress; fatigue performance; AA7075-T6; Ti-6Al-4V; AISI; 316; SCANNING PATTERNS; ALLOY; LIFE;

D O I：

10.17159/2411-9717/1619/2025

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Surface treatments like laser shock peening (LSP) induce residual stresses penetrating up to 1 mm deep, surpassing traditional methods, thus significantly increasing the potential impact on materials prevalent in the automotive and aerospace sectors. Through extensive fatigue testing and fractography investigations, it was determined that LSP resulted in a fatigue life increase of over five times for aluminium alloy AA7075-T6 and titanium Ti-6Al-4V. Increased fatigue life was also noted in AISI316 stainless steel, which showed increases in fatigue life of 1.7x. While fatigue life in all cases improved, the efficacy of LSP was shown to be material dependent.

引用

页码：347 / 354

页数：8