Abstract Manufacturing multi-material part is one of the native advantages of selective laser melting (SLM) due to its layer-by-layer manufacturing method, which is attracting more and more attention in recent years. In an effort to reveal the dual interfacial characterization of dissimilar materials manufactured by SLM with different printing sequences, this paper presents the morphology, microstructure, element distribution, phase composition and microhardness of multi-material interfaces between SLMed 316L steel and C52400 copper alloy. Both interfaces display isolated alloy islands with various shapes and different morphologies. The melt pool at 316L/C52400 interface is deeper and narrower than that at C52400/316L interface. Small 316L and C52400 spheres with a size of 1–5 μm are formed under the surface tension, Marangoni convection in the melt pool and rapid cooling condition, in which many smaller particles with a size of

中文翻译：

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316L不锈钢和C52400铜合金多材料选择性激光熔化中的双界面表征和性能

摘要 制造多材料零件是选区激光熔化（SLM）的天然优势之一，由于其逐层制造方法，近年来越来越受到关注。为了揭示不同印刷序列 SLM 制造的异种材料的双界面表征，本文介绍了 SLMed 316L 钢和 C52400 铜合金之间多材料界面的形貌、微观结构、元素分布、相组成和显微硬度。两个界面均显示具有各种形状和不同形态的孤立合金岛。316L/C52400界面的熔池比C52400/316L界面的熔池更深更窄。在表面张力作用下形成大小为 1-5 μm 的 316L 和 C52400 小球，