70/30 copper-nickel alloy was manufactured by laser powder bed fusion (LPBF), followed by the comprehensive investigation on the relationship between its microstructures and mechanical properties as well as corrosion behavior. The results show that dislocation tangles at cellular boundaries can greatly contribute to its superior tensile properties than the commercial counterpart. In addition, the combination of dislocation tangles and nanoscale copper enrichment/nickel depletion directly leads to the heterogeneous film formation process during immersion in corrosive media. Moreover, experimental and computational results both suggest that exposed facets are another important role to determine the corrosion behavior of LPBF 70/30 copper-nickel alloy.

中文翻译：

---

激光粉末床熔融70/30铜镍合金力学性能及腐蚀行为研究

采用激光粉末床熔合（LPBF）技术制备了70/30铜镍合金，并对其显微组织与力学性能以及腐蚀行为之间的关系进行了综合研究。结果表明，细胞边界处的位错缠结可以极大地提高其比商业同类产品优越的拉伸性能。此外，位错缠结和纳米级铜富集/镍贫化的结合直接导致了在腐蚀介质中浸泡过程中的异质膜形成过程。此外，实验和计算结果都表明，暴露的刻面是决定 LPBF 70/30 铜镍合金腐蚀行为的另一个重要作用。