Numerical Analysis on Fatigue Life of Wrought Magnesium Alloy Treated by Laser Shot Peening

Numerical study on fatigue life of ZK60 magnesium alloy plate before and after laser shot peening (LSP) was carried out in this paper. Based on the FEA model, residual stress field induced by LSP was analyzed, the fatigue life and position of weak area were predicted with ABAQUS software and MSC.Fatigue code, respectively, and the processing parameters were optimized. The results show that the fatigue life of ZK60 sheet metal by single LSP with one side and both sides increased by 72.9% and 78.5% compared with the untreated sample respectively. The size and depth of compressive residual stress increase with the increment of peening number, but when the peening number gets to a certain value, the residual stress reaches saturation and the fatigue life increase no longer significantly.

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Study on Strain Hardening and Fatigue Fracture of AZ31B Magnesium Alloy after Laser Shot Peening

Chinese Journal of Lasers ◽

10.3788/cjl201138.0803002 ◽

2011 ◽

Vol 38 (8) ◽

pp. 0803002

Author(s):

黄舒 Huang Shu ◽

周建忠 Zhou Jianzhong ◽

蒋素琴 Jiang Suqin ◽

盛杰 Sheng Jie ◽

徐增闯 Xu Zengchuang ◽

...

Keyword(s):

Magnesium Alloy ◽

Strain Hardening ◽

Fatigue Fracture ◽

Shot Peening ◽

Laser Shot ◽

Az31b Magnesium Alloy

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Numerical analysis of shot peening parameters for fatigue life improvement

10.1063/1.5066858 ◽

2018 ◽

Cited By ~ 1

Author(s):

M. R. Isa ◽

O. S. Zaroog ◽

P. Raj ◽

S. N. Sulaiman ◽

I. Abu Shah ◽

...

Keyword(s):

Fatigue Life ◽

Numerical Analysis ◽

Shot Peening ◽

Life Improvement

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Investigation of the fatigue life of pre- and post-drilling hole in dog-bone specimen subjected to laser shot peening

Materials & Design ◽

10.1016/j.matdes.2015.08.136 ◽

2015 ◽

Vol 88 ◽

pp. 106-114 ◽

Cited By ~ 11

Author(s):

X.Q. Zhang ◽

L.S. Chen ◽

S.Z. Li ◽

S.W. Duan ◽

Y. Zhou ◽

...

Keyword(s):

Fatigue Life ◽

Shot Peening ◽

Laser Shot ◽

Bone Specimen ◽

Drilling Hole ◽

Dog Bone

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Numerical Study on Strengthening Effect of Laser Shot Peening for Wrought Magnesium Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.217-219.2234 ◽

2012 ◽

Vol 217-219 ◽

pp. 2234-2237 ◽

Cited By ~ 1

Author(s):

Su Qin Jiang ◽

Hong Guang Xu

Keyword(s):

Residual Stress ◽

Fatigue Life ◽

Shot Peening ◽

Compressive Residual Stress ◽

Numerical Study ◽

Back Analysis ◽

Laser Shot ◽

Fatigue Properties ◽

Strengthening Effect ◽

Fea Model

Based on finite element method, the FEA model used for analyzing fatigue properties of sample treated by laser shot peening (LSP) was established. In order to research the influence of material intensity on LSP effect, two kinds of wrought magnesium alloys AZ31B and ZK60 with different intensity were chosen as object, the compressive residual stress and fatigue life after LSP were analyzed. After spring back analysis the elastic strain is released in material inner, the value of compressive residual stress was reduced; after LSP with 3 times, the fatigue life gains of AZ31B and ZK60 were 105% and 163%, respectively. The results show that strengthening effect of high intensity material treated by LSP is better than that of low intensity material.

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