Influence of aging heat treatment at 180 °C on cavitation erosion for aluminum alloy type 5083 in cold rolled state

Abstract Aluminum-based alloys have wide applicability in the construction of aircraft, vehicles, and ships. Some their components, during operation, such as radiators rotors cooling pumps propellers fishing pleasure boats are affected by abrasive, chemical cavitational corrosive action water. At certain hydrodynamic flow regimes, most dangerous becomes corrosion through cavitation. Operation regimes inevitably leads to damaging structure, due cyclic stresses micro-jets shock waves generated implosion cavitation bubbles. Although constitution alloying with other elements increase mechanical properties, service life is still limited when operating high-intensity flows. Therefore, researchers looking for solutions improve this resistance various treatments, bulk heat. Research heading same direction, but, made on 5083 alloy, presented paper. The results highlight behavior a modified structure compared semi-fabricated state (obtained rolling), three durations (one hours, 12 hours 24 hours) aging heat treatment 180 °C temperature, after hardening at 450 °C. tests were performed Laboratory Polytechnic University Timisoara, standard vibrating device piezoceramic crystals. expressed curves parameters specific evaluation resistance, macro microscopic images, showing unique aspects connection between properties obtained regimes. Thus, comparison results, including delivery (laminated product), shows that highest provided hours. time, erosion, pitting caverns type, differs from one another.