Abstract

The serrated flow phenomenon or Portevin-Le Chatelier (PLC) effect during plastic deformation of solid solutions has long been an area of interest. The PLC effect in dilute alloys has been well understood both from the experimental and theoretical viewpoints. The micromechanism is generally recognized to be associated with dynamic interaction between mobile dislocations and diffusive vacancies (for substitutional alloys) or solutes (for interstitial alloys), widely known as dynamic strain aging (DSA). The Fe-Mn-Al-C alloy system has attracted considerable attention in the past decades as a promising replacement for the conventional Fe-Ni-Cr stainless steel in view of its high strength, good toughness, light weight and low cost. Serrated flow for Fe-28Mn-9Al-xC is studied in this paper.

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