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Title: Shot Peening Of Non-ferrous Alloys To Enhance Fatigue Performance
Author: L. Wagner, M. Wollmann
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008094
Number of pages: 8
Abstract:
ABSTRACT
The HCF response to shot peening of the non-ferrous alloys based on magnesium, aluminum and titanium is compared and contrasted. It is shown that magnesium alloys respond
quite critically to a variation in Almen intensity. Marked enhancements in fatigue strength were observed after peening only at very low intensities. Aluminum alloys are
much more tolerable with regard to Almen intensity since no overpeening effect was observed. Generally, naturally aged conditions (T4) respond to shot peening more
beneficially than artificially aged conditions (T6). The response of titanium alloys to shot peening is highly dependent on the alloy class. The á titanium alloys often
respond quite beneficially. In contrast, (á+â) and in particular, metastable â titanium alloys can exhibit even a loss in fatigue strength after shot peening. Possible
explanations for such behavior are outlined in terms of work-hardening capabilities, mean stress and environmental sensitivities of the various materials and microstructural
conditions.
KEY WORDS Shot peening, light alloys, work-hardening, residual stresses, HCF performance
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This page last revised: 03/22/2010