Effects of Laser Peening on Fatigue Crack Behaviors in Pre-Cracked Cast Aluminum Alloy

2007 ◽  
Vol 345-346 ◽  
pp. 255-258 ◽  
Author(s):  
Yasuo Ochi ◽  
Kiyotaka Masaki ◽  
Takashi Matsumura ◽  
Yuji Sano ◽  
Koichi Akita ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Fatigue Cracks ◽  
Crack Growth Behavior ◽  
Cast Aluminum Alloy ◽  
Laser Peening ◽  
Cast Aluminum ◽  
Surface Fatigue

In order to investigate effects of low energy laser peening (LP) without protective coating on surface fatigue crack growth behavior, rotating bending fatigue tests were carried out on cast Al-Si-Mg aluminum alloy with a pre-cracked round bar type specimens. As the results, the fatigue crack growth was restrained by the compressive residual stress induced by laser peening treatment. And also, the three dimensional (3D) image of surface fatigue cracks was reconstructed by using a micro computed tomography (μCT) with phase contrast technique. It was also shown that the surface crack growth was restrained for the laser peened materials.

scholarly journals Retardation of Fatigue Crack Growth on AC4CH Cast Aluminum Alloy by Laser Peening

2007 ◽  
Vol 56 (12) ◽  
pp. 1133-1138 ◽  
Author(s):  
Kiyotaka MASAKI ◽  
Yasuo OCHI ◽  
Takashi MATSUMURA ◽  
Yuji SANO ◽  
Koichi AKITA ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Cast Aluminum Alloy ◽  
Laser Peening ◽  
Cast Aluminum

scholarly journals Fatigue crack growth properties in SiC particulate-reinforced cast aluminum alloy composites.

1995 ◽  
Vol 45 (6) ◽  
pp. 309-314 ◽  
Author(s):  
Jianqun HU ◽  
Shinji KUMAI ◽  
Akinori SEKIKAWA ◽  
Yakichi HIGO ◽  
Shigetomo NUNOMURA
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Growth Properties ◽  
Particulate Reinforced

Fatigue Crack Growth of LC9 Aluminum Alloy under Flying Loading with Corrosion Damage

2014 ◽  
Vol 488-489 ◽  
pp. 66-69
Author(s):  
Xu Dong Li ◽  
Zeng Jie Cai ◽  
Zhi Tao Mu
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Fatigue Cracks ◽  
Corrosion Damage ◽  
Growth Behavior ◽  
Transport Aircraft ◽  
Suitable Parameter ◽  
Corrosion Pits

This paper investigates the growth behavior of fatigue cracks initiated at corrosion pits in laboratory coupons of LC9 aluminum alloy subjected to a transport aircraft loading spectrum. Corrosion pits were introduced by exposing the coupons to EXCO solution for a variety of periods to produce corrosion damage varying from mild to severe. In general, the presence of corrosion damage reduced the fatigue lives of components to a severe extent. It was found that the depth of the corrosion pit was a suitable parameter for characterizing the corrosion damage and for predicting the fatigue life of the coupons using commercial fatigue crack growth software

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