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Progress of Er-containing aluminum alloysin marine applications

Zuoren Nie

Beijing University of Technology

Dr. Zuoren Nie is a member of Chinese Academy of Engineering (CAE), professor and President at Beijing University of Technology. Dr. Nie currently serves as the vice chairman of Chinese Materials Research Society (C-MRS) and Nonferrous Metals Society of China (NFsoc), vice director of National Standardization Committee for Carbon Dioxide Peaking and Carbon Neutrality, vice director of the Materials Science Department of Science and Technology Committee of Chinese Ministry of Education, the committee member of the Global Alliance for Life Cycle Assessment (LCA) Centers, and the regional editor for the International Journal of Life Cycle Assessment.

Abstact. Aluminum and its alloys have been widely used in the marine field due to their high specific strength, high specific modulus, high damage tolerance, heat resistance and corrosion resistance, etc., especially in the applications of structural materials for ships, offshore helicopter platforms, liquefied natural gas (LNG) storage vessels, and seafloor drilling rods. Materials used in marine environments are subject to corrosion, fatigue and impact deterioration due to the seawater, droplet contact, salt atmosphere and other complex service environment. The alloy properities in mechanics, corrosion, weldability, and other comprehensive performance have be concerned. The addition of Er element and the precipitation of Al3Er phase can obviously refine the aluminum alloys structure, increase the recrystallization temperature, promote the precipitation of main strengthening phases, and greatly improve the comprehensive properties of aluminum alloys, such asheat resistance, corrosion resistance and 3D printing cracksuppression. At present, the precise regulation of the main alloying elements, together with the advanced micro-alloying technology has become a new route to develop future advanced aluminum alloys in the marine field.

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