The mechanical properties and cavitation erosion-corrosion behavior of directed energy deposition (DED) and as-cast nickel-aluminum bronze (NAB) alloys in 3.5 wt% NaCl solution were investigated. The DED-produced NAB alloy showed a finer microstructure, and the content of κ phases significantly decreased, improving yield strength (increased by 27.76%) and elongation (increased by 54.89%) of NAB alloy. The DED-produced NAB exhibited a more uniform microstructure, fewer high-angle grain boundaries (HAGBs), and twin boundaries (∑3), resulting in a weakened synergistic effect between corrosion and mechanical attack. Compared with the as-cast counterpart, the mass loss rate of DED-produced NAB decreased by 74.77%.

中文翻译：

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定向能量沉积镍铝青铜的先进抗空蚀腐蚀性能

研究了定向能量沉积 (DED) 和铸态镍铝青铜 (NAB) 合金在 3.5 wt% NaCl 溶液中的机械性能和空化侵蚀腐蚀行为。 DED生产的NAB合金呈现出更细小的组织，κ相含量显着降低，提高了NAB合金的屈服强度（提高了27.76%）和延伸率（提高了54.89%）。 DED 生产的 NAB 表现出更均匀的微观结构、更少的大角度晶界 (HAGB) 和孪晶界 (Σ3)，导致腐蚀和机械攻击之间的协同效应减弱。与铸态相比，DED生产的NAB的质量损失率降低了74.77%。