Laser Shock Processing of Ni-Base Superalloy and High Cycle Fatigue Properties

Abstract:

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A plasma sound wave detection method of laser shock processing (LSP) technology is proposed. Speciments of Ni-base superalloy are used in this paper. A convergent lens is used to deliver 1.2 J, 10 ns laser pulses by a Q-switch Nd:YAG laser, operating at 1 Hz. The influence of the laser density to the shock wave is investigated in detail for two different wavelength lasers. Constant amplitude fatigue data are generated in room environment using notch specimens tested at an amplitude of vibration 2.8 mm and first-order flextensional mode. The results show that LSP is an effective surface treatment technique for improving the high cycle fatigue performance of Ni-base superalloys having a factor of 1.62 improvement in fatigue life.

Info:

Periodical:

Materials Science Forum (Volumes 697-698)

Edited by:

Tian Huang, Dawei Zhang, Bin Lin, Anping Xu, Yanling Tian and Weiguo Gao

Pages:

235-238

DOI:

10.4028/www.scientific.net/MSF.697-698.235

Citation:

L. Zhou et al., "Laser Shock Processing of Ni-Base Superalloy and High Cycle Fatigue Properties", Materials Science Forum, Vols. 697-698, pp. 235-238, 2012

Online since:

September 2011

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Price:

$35.00

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