Paper Title:
Laser Shock Processing of Ni-Base Superalloy and High Cycle Fatigue Properties
  Abstract

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)
Chapter
I. Advanced Manufacturing Technology and Equipment
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, Y.H. Li, W.F. He, X.D. Wang, Q.P. Li, "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
$32.00
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