Alternative Mechanical Surface Treatments: Microstructures, Residual Stresses & Fatigue Behavior

  1. Prof. Dr.-Ing Lothar Wagner Chairman of ICSP8
  1. Igor Altenberger

Published Online: 7 FEB 2006

DOI: 10.1002/3527606580.ch54

Shot Peening

Shot Peening

How to Cite

Altenberger, I. (2003) Alternative Mechanical Surface Treatments: Microstructures, Residual Stresses & Fatigue Behavior, in Shot Peening (ed L. Wagner), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606580.ch54

Editor Information

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

Author Information

  1. Department of Materials Science & Engineering, University of California, Berkeley, CA, USA

  1. Institute of Materials Technology, University of Kassel, Kassel, Germany

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:

  • alternative mechanical surface treatments;
  • microstructures;
  • residual stresses;
  • fatigue behavior

Summary

In comparison to the most widely used mechanical surface treatment shot peening, common alternative methods such as deep rolling and less common methods such as laser shock peening, ultrasonic shot peening, water peening or various burnishing methods have been introduced into practical applications only rarely, or for highly specialized components, or are just on the verge from laboratory research into larger scale applications. However, in the future it is expected that these so called “alternative” mechanical surface treatment methods will be more widespread owing to superior benefits for materials' behavior, improving process technology and dramatically decreasing costs.

The basic principles of all mechanical surface treatments are well known: In all cases a localized elastic-plastic deformation in ear-surface regions leads to the formation of compressive residual stresses and severe microstructural alterations (usually associated with intense work hardening), enabling the thus strengthened near-surface regions to withstand higher resistance against fatigue crack initiation and propagation. Moreover, in some cases, additional effects may give rise to further fatigue life/strength enhancement such as surface smoothening or deformation-induced phase transformations. At closer look, ear surface properties and thus fatigue behavior might be distinctly different for different surface treatment methods. It is the objective of this contribution to shed some light on these basic effects and to propose some basic guidelines for the utilization of ‘optimized’ treatments from a materials science perspective.