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Microstructure evolution and tensile property of high entropy alloy particle reinforced 316 L stainless steel matrix composites fabricated by laser powder bed fusion by Xinqi Zhang; Dongye Yang; Yandong Jia; Gang Wang; Konda Gokuldoss Prashanth is a Materials Science article available to read on EtoBox.

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Laser powder bed fusion (LPBF) High entropy alloy 316 L stainless steel Metal matrix composites (MMCs) A B S T R A C T 316 L stainless steel is prone to failure under high-strength conditions due to low strength and poor wear resistance, which limits its further application severely. In this study, 2 wt% FeCoNiAlTi high entropy alloy (HEA) powders and 316 L stainless steel powders were mixed to fabricate HEA reinforced 316 L stainless steel matrix composites (MMCs) via laser powder bed fusion (LPBF). The influence of scanning speed on microstructure evolution, the mechanical properties and the strengthening mechanisms have been investigated systematically. The LPBF-fabricated HEA/316 L MMCs consists of both γ-Fe and α-Fe phases. For HEA/316 L MMCs, the grains are refined with the increase of scanning speed and the minimum size is around 0.64 μm. The precipitation of nanoparticles is observed, and the nanoparticles form a strong interfacial bounding with matrix, which indicates the good metallurgical bonding between HEA and 316 L stainless steel. The tensile strength of the LPBF-fabricated composites increases from 1164 MPa to 1276 MPa with increased scanning speed, which is approxi

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Author

Xinqi Zhang; Dongye Yang; Yandong Jia; Gang Wang; Konda Gokuldoss Prashanth

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)