Isothermal Fatigue Behavior and Residual Stress States of Mechanically Surface Treated Ti-6A1-4V: Laser Shock Peen vs. Deep Rolling

  • Ulf, Berthold scholtesl
  • Published 2006

Abstract

In this paper, the high-temperature fatigue behavior and residual stress states of a Ti-6A1-4V alloy are investigated after mechanical surface treatment. In particular, the two surface treatments investigated, laser shock peening and deep rolling, were observed to result in significantly different residual stress states. The consequent isothermal fatigue behavior at elevated temperatures, characterized using cyclic deformation curves, are discussed in terms of the stability of the nearsurface work hardening and compressive resid~lal stresses. Despite pronounced relaxation of the residual stresses, both laser shock peening and deep rolling led to a significant improvement in the cyclic deformation behavior and, hence, increased fatigue lifetimes at elevated temperatures as compared to untreated materials states.

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Cite this paper

@inproceedings{Ulf2006IsothermalFB, title={Isothermal Fatigue Behavior and Residual Stress States of Mechanically Surface Treated Ti-6A1-4V: Laser Shock Peen vs. Deep Rolling}, author={Ulf and Berthold scholtesl}, year={2006} }