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Experimental Study on Residual Stress of K24 Superalloy in Laser Cladding Zone by Laser Shock Processing

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Abstract:

The surface of K24 superalloy was processed with laser cladding & LSP (laser shock processing). Residual stress in the laser cladding zone by LSP was measured with X-ray stress tester X-350A, and the variational rule of residual stress in the cladding zone by tempering treatment of 8 hours and 16 hours was measured, respectively. The experimental results show that compressive residual stress of K24 superalloy surface by laser cladding & laser shock processing is above -600MPa, which exceeds residual stress by mechanical peening treatment; and there is no clear effect on residual stress by tempering treatment at 600°C for 8 hours and 16 hours, respectively, which can improve fatigue life of K24 superalloy.

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Periodical:

Key Engineering Materials (Volumes 353-358)

Pages:

453-456

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.353-358.453

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Online since:

September 2007

Authors:

Jin Zhon Lu, Yong Kang Zhang, Y.Y. Xu, De Jun Kong, H.B. Yao, Xu Dong Ren

Keywords:

K24 Superalloy, Laser Cladding, Laser Shock Processing (LSP), Residual Stress

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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