A cast manganese-aluminum bronze (MAB) is subjected to friction stir processing (FSP), and the corrosion and cavitation erosion behaviors are studied. Results indicate that FSP breaks the large-sized κ phases into small particles and remarkably homogenizes and refines the α and β phases in the cast substrate. Therefore, the hardness is raised after FSP. A finer microstructure is obtained by the double-pass FSP. The FSP MABs exhibit higher electrochemical activity than the cast in 3.5 wt% NaCl solution, probably due to the residual stress induced by severe plastic deformation during FSP. However, after long-term immersion, severe localized corrosion occurs and results in the formation of large-size corrosion pits on the cast MAB. By contrast, the FSPed MABs undergoes relatively uniform corrosion and no noticeable pits are found on the double-pass FSPed MAB because of the homogenized microstructure and formation of homogeneous and protective corrosion product ...

中文翻译：

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铸造锰铝青铜的摩擦搅拌工艺，以提高耐腐蚀性和抗气蚀性

对铸造的铝铝青铜（MAB）进行摩擦搅拌处理（FSP），并研究其腐蚀和空蚀腐蚀行为。结果表明，FSP将大尺寸的κ相分解成小颗粒，并显着均质化和细化了铸造基体中的α和β相。因此，FSP之后硬度增加。通过双通道FSP获得了更精细的微观结构。FSP MAB的电化学活性高于3.5 wt％NaCl溶液中的铸件，可能是由于FSP期间严重的塑性变形所引起的残余应力。但是，长期浸泡后，会发生严重的局部腐蚀，并在铸造MAB上形成大尺寸的腐蚀坑。相比之下，