Paper Title:
Fatigue Life Improvement Using Mechanical Post Treatment for Weldment
  Abstract

Mechanical post treatments for welded structures have been applied in various industrial fields and, in most cases, have been found to cause substantial increase in their fatigue strength. These methods, generally, consist of the modification of weld toe geometry and the introduction of compressive residual stresses. In hammer peening, the weld profile is modified due to removal or reduction of minute crack-like flaws; compressive residual stresses are also induced by repeated hammering of the weld toe region with blunt-nosed chisel. In this study, a hammer peening procedure, using commercial pneumatic chipping hammer, was developed; a quantitative measure of fatigue strength improvement was performed. The fatigue life of hammer-peened specimen was prolonged by approximately 10 times in S=240MPa, and was doubled for the as-welded specimen.

  Info
Periodical
Materials Science Forum (Volumes 580-582)
Edited by
Changhee Lee, Jong-Bong Lee, Dong-Hwan Park and Suck-Joo Na
Pages
97-100
DOI
10.4028/www.scientific.net/MSF.580-582.97
Citation
S. H. Han, J. W. Han, Y. Y. Nam, "Fatigue Life Improvement Using Mechanical Post Treatment for Weldment", Materials Science Forum, Vols. 580-582, pp. 97-100, 2008
Online since
June 2008
Export
Price
$32.00
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