Cai Xiang, Yang Mengmeng, Li Shujun, Wang Cheng, Qiao Yanxin, Zhou Jian, Xue Feng
School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
Jiangsu Key Laboratory for Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
Ultrason Sonochem. 2025 Feb;113:107235. doi: 10.1016/j.ultsonch.2025.107235. Epub 2025 Jan 19.
In this study, the cavitation erosion (CE) behavior of wire-arc directed energy deposition (DED) nickel-aluminum bronze (NAB) alloys is compared with that of cast alloys, and the synergistic effect between corrosion and CE is investigated. The CE resistance of the wire-arc DED NAB alloy is better than that of the cast alloys. The CE of NAB alloys preferentially occurs at the boundaries of the α-Cu and residual β phases, and in the matrix around the κ phase. The residual β phase exhibits greater damage than the α-Cu phase. Throughout the CE, the alloys are dominated by local corrosion characteristics (selective-phase corrosion), while the wire-arc DED NAB alloys exhibit superior uniform corrosion characteristics. Notably, the uniform corrosion characteristics of all alloys are enhanced after CE. The mass loss caused by the synergistic effect of the cast NAB alloy and wire arc DED NAB alloy accounts for 56% and 52% of the total mass loss, with the corrosion-induced CE increment exceeding that of the CE-induced corrosion increment.
在本研究中，将电弧定向能量沉积（DED）镍铝青铜（NAB）合金的空蚀行为与铸造合金进行了比较，并研究了腐蚀与空蚀之间的协同效应。电弧DED NAB合金的耐空蚀性能优于铸造合金。NAB合金的空蚀优先发生在α-Cu和残余β相的边界处以及κ相周围的基体中。残余β相比α-Cu相表现出更大的损伤。在整个空蚀过程中，合金以局部腐蚀特征（选择性相腐蚀）为主，而电弧DED NAB合金表现出优异的均匀腐蚀特征。值得注意的是，所有合金在空蚀后的均匀腐蚀特征均得到增强。铸造NAB合金和电弧DED NAB合金协同效应造成的质量损失分别占总质量损失的56%和52%，腐蚀引起的空蚀增量超过空蚀引起的腐蚀增量。
