Abstract
The effect of nitrogen implantation on the fatigue behaviour of a 2017 aluminum alloy, a 316 L type stainless steel and an OFHC copper which exhibit different crack initiation mechanisms has been investigated. In 2017 the formation of a continuous layer of AIN has been observed for high implantation doses. No increase in fatigue life was brought about in 2017 or in 316 L even though a strong modification of surface slip features was observed for the latter. On the other hand a significant increase in fatigue life was observed for N-implanted copper specimens. The results are discussed in terms of differences in deformation and crack initiation modes.
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