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High Ductility and Transformation-Induced-Plasticity in Metastable Stainless Steel Processed by Selective Laser Melting with Low Power

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Document pages: 20 pages

Abstract: A metastable austenitic Fe-Cr-Ni steel was processed by selective laser melting with low power, resulting in nearly random crystallographic texture. In-situ tensile loading and neutron diffraction experiments were undertaken and the results indicate high ductility, despite the presence of porosity, and pronounced strain-induced martensitic transformation. A secondary hardening is observed in the mechanical data due to the martensite carrying significant load, upon its formation. The pronounced martensitic transformation is discussed with respect to the initial and the evolving deformation texture and its affinity for forming martensite under uniaxial tensile loading.

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