High ductility and transformation-induced-plasticity in metastable stainless steel processed by selective laser melting with low power

SCRIPTA MATERIALIA

卷:176

Article

Polatidis, E.¹  Capek, J.¹  Arabi-Hashemi, A.²  Leinenbach, C.²  Strobl, M.¹ 

[1] Paul Scherrer Inst, Lab Neutron Scattering & Imaging LNS, WBBA 112, CH-5232 Villigen, Switzerland

[2] Empa, Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

关键词: Additive manufacturing;    Stainless steels;    Tension test;    Martensitic phase transformation;    Neutron diffraction;   

DOI  :  10.1016/j.scriptamat.2019.09.035

来源: Elsevier

【 摘 要 】

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. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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