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| Effect of surface treatments on fatigue life of Ti--6--22--22 alloy at room and high temperatures |
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Cite this article:
;. Effect of surface treatments on fatigue life of Ti--6--22--22 alloy at room and high temperatures. Chin J Mater Res, 2004, 18(5): 471-476.
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Abstract Shot--peening and ion implantation were adopted to treat the surface of the
machined specimens of Ti--6--22--22 alloy, and the stress controlled fatigue
tests were performed at room temperature and 400℃, respectively. Experimental
results indicated that the effect of shot--peening and ion implantation on
the $S$--$N$ curves is related to temperature. Both shot--peening and ion--implantation
have little effect on the fatigue strength at room temperature, but substantially
increase the fatigue strength at 400℃ comparing with the untreated counterparts.
SEM fractography surface analysis indicates that fatigue cracks of the
treated samples initiate at ~subsurface after long--time fatigue at 400℃
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Received: 04 November 2004
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