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Mechanism Influence on Fatigue Characters of Aerial Engine Blade by Laser Shock Processing
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Mechanism Influence on Fatigue Characters of Aerial Engine Blade by Laser Shock Processing

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Abstract:

In Laser Shock Processing when a material is irradiated with short laser pulses (ns)of very high densities(>GW/cm2), a high intensity shock wave is generated. This treatment can reduce the rate of fatigue cracking and stress corrosion cracking in structural metals or alloys needed for aerospace, nuclear power plants, and military applications. And laser shock processing has been shown to be a viable method of strengthen metallic components. Transformation on the characters of aerial engine blade by laser shock processing and influence on the fatigue life with these transformations were studied. And the relatively fatigue life experiment of aerial engine blade was done to validate the influence on the fatigue life of aerial engine by laser shock processing. It was found that laser shock processing could bring residual compressive stress and high-density dislocation on the surface of the blade. All these transformation greatly increase the fatigue life of aerial engine blade.

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Periodical:

Advanced Materials Research (Volumes 24-25)

Pages:

371-375

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.24-25.371

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Online since:

September 2007

Authors:

Xu Dong Ren, Yong Kang Zhang, Y.H. Li, W. Cheng, M. Zhuang

Keywords:

Aerial Engine Blade, Fatigue Characters, Laser Shock

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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