Laser powder bed fusion of in-situ amorphous oxide dispersion strengthened immiscible Cu-316 L bimetallic composite: Formation mechanism and current-carrying wear behavior

Document Type

Journal Article

Publication Title

Tribology International

Volume

200

Publisher

Elsevier

School

Centre for Advanced Materials and Manufacturing / School of Engineering

Funders

Guangzhou Municipal Science and Technology Project (92166112, 52373236, 52271132) / Natural Science Foundation of Guangdong Province (2024A1515010658) / Guangdong Province International Science and Technology Cooperation Project (2023A0505050103) / Guangxi Key Laboratory of Information Materials (231033-K) / Open Project Program of Wuhan National Laboratory for Optoelectronics (2021WNLOKF010)

Comments

Qiu, Y., Ren, P., Yang, H., Guo, B., Shi, C., Lu, Y., ... & Zhou, S. (2024). Laser powder bed fusion of in-situ amorphous oxide dispersion strengthened immiscible Cu-316 L bimetallic composite: Formation mechanism and current-carrying wear behavior. Tribology International, 200, 110096. https://doi.org/10.1016/j.triboint.2024.110096

Abstract

This work used laser powder bed fusion (LPBF) to successfully produce in-situ nanoscale amorphous oxide dispersion strengthened (AODS) immiscible Cu-316 L bimetallic composite. Due to high affinity of Cr and O and the high cooling rate of LPBF, the formation of in-situ nano-amorphous Cr-rich oxide particles can refine the γ-Fe particles embedded in ε-Cu matrix. Moreover, the γ-Fe particles have “shadow protection effect” on ε-Cu matrix, the wear mechanism is mechanical wear during low current-carrying wear (0–2 A). However, during high current-carrying wear (5 A and 7 A), arc erosion preferentially occurs on γ-Fe particles with lower work functions, which enhances arc erosion resistance of ε-Cu matrix. The wear mechanisms are dominated by electric-arc erosion and oxidation wear.

DOI

10.1016/j.triboint.2024.110096

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