Study on fatigue crack growth performance of EH36 weldments by laser shock processing

2019 ◽  
Vol 15 ◽  
pp. 199-204 ◽  
Author(s):  
Wang Yun ◽  
Baidoo Philip ◽  
Xu Zhenying ◽  
Wu Junfeng
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Growth Performance ◽  
Crack Growth ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

Fatigue Crack Propagation Experiment and Simulation on 7050 Aluminum Alloy

2011 ◽  
Vol 464 ◽  
pp. 560-563
Author(s):  
Xu Dong Ren ◽  
Yong Zhuo Huangfu ◽  
Yong Kang Zhang ◽  
Da Wei Jiang ◽  
Tian Zhang
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Fatigue Life ◽  
Fatigue Crack Growth ◽  
Crack Propagation ◽  
Crack Growth ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
7050 Aluminum Alloy ◽  
Shock Processing

In this paper, an experiment of fatigue crack propagation in 7050 aluminum alloy was presented. Laser shock processing (LSP) is used to shock the crack surface. Compared with the specimen without LSP, the fatigue life after LSP increased greatly. The simulation of the fatigue crack growth in 7050 aluminum alloy is implemented in FRANC2D. Simulating result is in accordance with the result of the experiment well. Laser shock processing increases the fatigue life and reduce fatigue crack growth rate, it has good prospect on the study of crack arrestment.

Experiment and Simulation of Laser Shock Processing on Fatigue Crack Growth of TC4 Alloy

2010 ◽  
Vol 139-141 ◽  
pp. 426-429 ◽  
Author(s):  
Yin Qun Hua ◽  
Zheng Rong Cai ◽  
Rui Fang Chen ◽  
Yu Xiao Chen ◽  
Hui Jiang
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Rates ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Tc4 Alloy ◽  
Peak Pressures ◽  
Shock Processing ◽  
Crack Growth Rates

The residual stress induced by Laser shock processing (LSP) can improve properties of fatigue crack growth. In this paper, the CT models of LSP and fatigue crack growth have been built. We experimented the TC4 alloy treated by LSP and fatigue crack growth and then simulated the fatigue crack growth. The results show that the values of simulations are conform to experiments. With the increment of peak pressures and overlapping rates, the fatigue lives have been increased, the fatigue crack growth rates have been descent. The fatigue lives have been 1.46-3.03 times compared with untreated by LSP, the fatigue crack growth rates have been 0.127-0.95 time compared with untreated by LSP, but to overlapping rates, it is not obvious with the improvement compared with peak pressures.

Effect of laser shock processing on fatigue crack growth of duplex stainless steel

2011 ◽  
Vol 528 (3) ◽  
pp. 914-919 ◽  
Author(s):  
C. Rubio-González ◽  
C. Felix-Martinez ◽  
G. Gomez-Rosas ◽  
J.L. Ocaña ◽  
M. Morales ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Duplex Stainless Steel ◽  
Crack Growth ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

Effect of laser shock processing on fatigue crack growth and fracture toughness of 6061-T6 aluminum alloy

2004 ◽  
Vol 386 (1-2) ◽  
pp. 291-295 ◽  
Author(s):  
C. Rubio-González ◽  
J.L. Ocaña ◽  
G. Gomez-Rosas ◽  
C. Molpeceres ◽  
M. Paredes ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

Effects of Laser Shock Processing on Fatigue Crack Growth in Ti-17 Titanium Alloy

2017 ◽  
Vol 26 (2) ◽  
pp. 813-821 ◽  
Author(s):  
Shuai Huang ◽  
Ying Zhu ◽  
Wei Guo ◽  
Peng Peng ◽  
Hongchao Qiao ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

Effect of laser shock processing on fatigue crack growth and fracture toughness of 6061-T6 aluminum alloy

2004 ◽  
Vol 386 (1-2) ◽  
pp. 291-295 ◽  
Author(s):  
C RUBIOGONZALEZ ◽  
J OCANA ◽  
G GOMEZROSAS ◽  
C MOLPECERES ◽  
M PAREDES ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

High Dense Compressive Residual Stress Produced in Laser Shock Processing on Ti6Al4V Alloys

2007 ◽  
Vol 353-358 ◽  
pp. 1617-1620 ◽  
Author(s):  
Xu Dong Ren ◽  
Yong Kang Zhang ◽  
Jian Zhong Zhou ◽  
Yong Yu Gu ◽  
Y.Y. Xu ◽  
...  
Keyword(s):  
Residual Stress ◽  
Fatigue Crack ◽  
Surface Stress ◽  
Compressive Residual Stress ◽  
High Energy ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Large Spot ◽  
Small Spot ◽  
Shock Processing

Laser shock processing (LSP) employs high-energy laser pulses from a solid-state laser system to create intense shock waves into a material, which can induce compressive residual stresses in the target surface and improve its mechanical property efficiency. Residual stress of Ti6Al4V alloy both before and after LSP with multishocks was analysised. The depth of compressive residual stress was found to have a dependence on the number of shocking layers and a slight dependence on the level of irradiance. Surface stress improvements of more than 50% increases are possible after laser shock processing with either large spot or small spot patterns. The large spot gave a surface stress of 432MPa and a depth of over 1mm. The low intensity small spot gave a surface stress of 285MPa with a depth comparable to the large spot. Laser shock processing induces a compressive residual stress field, which increases fatigue crack initiation life and reduces fatigue crack growth rate.

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