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Al‐bronze used in this study is the alloy that has good strength, ductility and excellent corrosion resistance, oxidation resistance at high temperature, containing 9–12% of aluminum. This alloy is appropriate for large castings such as huge propeller, impeller, valves, high strength bearings and gear materials for ships, and widely used as the mechanical parts for chemical engineering. It was investigated the cavitation characteristics with temperature and cavitation time parameters for the ALBC3 in sea water environment. As a result, the cavitation surface damage showed a decreasing tendency with temperature and time increasing. Copyright © 2012 John Wiley & Sons, Ltd.

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Friction stir processing (FSP) was used to improve the mechanical characteristics and microstructure of AC7AV cast Al–Mg alloy. The mechanical characteristics of AC7AV deteriorated due to significant defects caused by excessive friction heat after being subjected to multi-pass FSP. An alternative method of multi-pass FSP with two traveling directions was used to solve the defect problems in multi-pass FSP for cast AC7AV Al alloy. The results of various multi-pass FSP experiments showed that the mechanical properties of the cast AC7AV Al alloy specimens subjected to this alternative multi-pass FSP were better than those produced by the conventional multi-pass FSP method.