High-Entropy Alloy Activating Laves-Phase Network for Multi-Component Metallic Coatings with High Hardness

Ao Yan; Guoxing Chen; Huiqiang Ying; Xiao Yang; Zongde Kou; Song Tang; Longlong Fan; Xiang Chen; He Zhu; Zhiguang Zhu; Yang Ren; Si Lan

doi:10.3390/nano14121016

Nanomaterials (Jun 2024)

High-Entropy Alloy Activating Laves-Phase Network for Multi-Component Metallic Coatings with High Hardness

Ao Yan,
Guoxing Chen,
Huiqiang Ying,
Xiao Yang,
Zongde Kou,
Song Tang,
Longlong Fan,
Xiang Chen,
He Zhu,
Zhiguang Zhu,
Yang Ren,
Si Lan

Affiliations

Ao Yan: Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Guoxing Chen: Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Huiqiang Ying: Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Xiao Yang: Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Zongde Kou: Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Song Tang: Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Longlong Fan: Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Xiang Chen: Nano and Heterogeneous Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
He Zhu: Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Zhiguang Zhu: School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Yang Ren: Department of Physics, City University of Hong Kong, Hong Kong 999077, China
Si Lan: Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

DOI: https://doi.org/10.3390/nano14121016
Journal volume & issue: Vol. 14, no. 12
p. 1016

Abstract

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The low hardness and poor wear resistance of laser-cladding 316L stainless steel impose significant constraints on its practical applications. In this study, a strategy for strengthening laser-cladding 316L stainless steel with WMoTaNb refractory high-entropy alloy as a reinforcement material is proposed. The results confirm that the coating primarily comprises a body-centered cubic (BCC) Fe-based solid solution, a network-distributed hexagonal Fe2X (X = W, Mo, Ta, and Nb) Laves phase, and a diffusely distributed face-centered cubic (FCC) (Ta, Nb)C phase. The Fe-based solid solution distributes along columnar and fine dendrites, while the Laves phase and (Ta, Nb)C phase are in the inter-dendrites. The presence of a significant number of network Laves phases exhibiting high strength and hardness is the primary factor contributing to the enhancement of coating microhardness. The hardness of the composite coating is increased by nearly twice compared to that of the 316L coating, resulting in an improved wear resistance. The present work can shed light on designing and fabricating 316L stainless steel coating with enhanced hardness and wear resistance.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

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