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

  1. Prof. Dr.-Ing Lothar Wagner Chairman of ICSP8
  1. Ulf Noster1,
  2. Igor Altenberger2,
  3. Robert O. Ritchie2 and
  4. Berthold Scholtes1

Published Online: 7 FEB 2006

DOI: 10.1002/3527606580.ch57

Shot Peening

Shot Peening

How to Cite

Noster, U., Altenberger, I., Ritchie, R. O. and Scholtes, B. (2003) Isothermal Fatigue Behavior and Residual Stress States of Mechanically Surface Treated Ti-6Al-4V: Laser Shock Peening vs. Deep Rolling, in Shot Peening (ed L. Wagner), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606580.ch57

Editor Information

  1. TU Clausthal, Institut für Werkstoffkunde und Werkstofftechnik, Agricolastr. 6, D-38678 Clausthal-Zellerfeld, Germany

Author Information

  1. 1

    Institute of Materials Technology, University Kassel, Kassel, Germany

  2. 2

    Department of Materials Science and Engineering, University of California, Berkeley, CA, USA

Publication History

  1. Published Online: 7 FEB 2006
  2. Published Print: 12 MAY 2003

ISBN Information

Print ISBN: 9783527305377

Online ISBN: 9783527606580

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Keywords:

  • isothermal fatigue behavior;
  • residual stress states of mechanically surface treated Ti-6Al-4V;
  • laser shock peening;
  • deep rolling

Summary

In this paper, the high-temperature fatigue behavior and residual stress states of a Ti-6Al-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 near-surface work hardening and compressive residual 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.