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High Temperature Fatigue of Mechanically Surface Treated Materials

  • Introduction The most well known effect of mechanical surface treatments on metallic materials is the improvement in fatigue properties. It is therefore not surprising that most of the archival literature on mechanical surface treatments, such as shot peening, deep rolling and laser shock peening, deals with the effect of near-surface properties on fatigue behavior. Most of these studies, however, are confined to room temperature fatigue behavior; in comparision, the effect of mechanical surface treatment on fatigue behavior at high temperatures has been rarely investigated [1-5]. The reason for this disparity can be found in the popular belief that fatigue strength improvement by mechanical surface treatments is mainly due to the presence of compressive residual stresses, and since such stresses should anneal out at elevated temperatures, mechanical surface treatments for high temperature applications would appear questionable. However, this view may be over simplistic as there is always a possibility that the residual stresses may be at least partially stable at elevated temperatures [6]; in addition, other factors may be involved, such as the nature of the near-surface microstructure. Accordingly, it is the objective of this study to examine the role of mechanical surface treatments on the high temperature fatigue behavior of several metallic engineering materials. Moreover, it is the aim of this work to clarify what are the critical temperature "thresholds' at which near-surface microstructures and residual stresses become unstable and whether this can explain the observed fatigue behavior.

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Metadaten
Author:Igor Altenberger, Ulf Noster, Berthold Scholtes, Robert O. Ritchie
DOI:https://doi.org/10.1002/3527606580.ch62
ISBN:9783527606580
Parent Title (English):Shot peening
Publisher:Wiley-VCH
Place of publication:Weinheim; [Cambridge]
Editor:Lothar Wagner
Document Type:Part of a Book
Language:English
Year of first Publication:2003
Release Date:2023/07/21
First Page:483
Last Page:489
Konferenzangabe:8th International Conference on Shot Peening held in Garmisch-Partenkirchen, Germany, September16-20, 2002
Institutes:Fakultät Maschinenbau
Technologie-Campus Parsberg-Lupburg
Fakultät Maschinenbau / Labor Werkstoffrandschichtanalytik
Publication:Externe Publikationen
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG