Paper Title:
Effects of Different R Ratios on Fatigue Crack Growth in Laser Peened Friction Stir Welds
  Abstract

The influence of laser peening on the fatigue crack growth behavior of friction stir welded (FSW) Aluminum Alloy (AA) 7075-T7351 sheets was investigated. The surface modification resulting from the peening process on the fatigue crack growth of FSW was assessed for two different R ratios. The investigation indicated a significant decrease in fatigue crack growth rates resulting from using laser shock peening compared with unpeened, welded and unwelded specimens. The slower fatigue crack growth rate was attributed to the compressive residual stresses induced by the peening.

  Info
Periodical
Materials Science Forum (Volumes 580-582)
Edited by
Changhee Lee, Jong-Bong Lee, Dong-Hwan Park and Suck-Joo Na
Pages
675-680
DOI
10.4028/www.scientific.net/MSF.580-582.675
Citation
O. Hatamleh, L. Hackel, S. Forth, "Effects of Different R Ratios on Fatigue Crack Growth in Laser Peened Friction Stir Welds", Materials Science Forum, Vols. 580-582, pp. 675-680, 2008
Online since
June 2008
Export
Price
$32.00
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