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Aspects of Ductility, Toughness and Formability of Steel Sheet in Relation to Transformation Plasticity

Research Area: Physical Metallurgy Year: 1992
Type of Publication: Article
Authors:
Abstract:
Transformation plasticity, the macroscopic plastic associated with phase transformations under stress, has allowed the achievement of improved mechanical properties in a wide range of materials. In metastable fully-austenitic steels, transformation plasticity is responsible for the significant enhancement of ductility and toughness. The ultra-high-strength martensitic steels toughness enhancement of the order of 40% is attributable to the transformation of precipitated austenite, a phenomenon called dispersed-phase transformation toughening. These concepts are explored further towards the development of triple-phase microstructures in low-alloy steels where the transformation plasticity of dispersed austenite leads to the enhanced stretch-formability required for automotive applications.
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