Abstract
SummaryChromium plating high strength titanium alloys reduces the alloys’ fatigue strength by approximately 80%. Tests have been carried out to establish whether this loss in fatigue strength can be avoided by adequate shot peening of the titanium substrate prior to plating. The method employed to secure adherent electrodeposited coatings on to titanium alloys IMI 314 and IMI 680 involved a post plating heat treatment at 450°C for 1 h. Therefore it was necessary to confirm whether the beneficial effect of shot peening was maintained following this heat treatment. The results showed that when the basis metal was shot peened to a sufficiently high intensity no significant loss in fatigue strength occurred even after chromium plating and heat treatment at 450°C for 1 hour.
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