科研之友
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摘要
The influence of annealing on 316L stainless steel prepared by hybrid in-situ rolled wire-arc additive manufacturing is investigated. The as-deposited steel consists of austenite and dendritic delta-ferrite phases. Upon increasing the annealing temperature, both the grain size and the type, shape, and content of the second phase undergo complex changes. Particularly, an annealing-induced abnormal strength-ductility synergy is observed after annealing at 1050 degrees C. This is primarily attributed to the formation of dispersed and equiaxed sigma phases, which not only cause significant strengthening but also inhibit the initiation and coalescence of parallel cracks.
