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Aluminum-based metallic glass coatings prepared with magnetic field assisted laser cladding

WANG Xiaoming;ZHU Sheng;YANG Baijun;ZHANG Yao;XU Anyang;National Key Laboratory for Remanufacturing,Academy of Army Armored Forces;Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences;  
Al-Ni-Y-Co-La five-component metallic glass cladding layer was prepared on the surface of 5083 aluminum alloy by magnetic field assisted laser cladding technology to improve the surface properties of the aluminum alloy.The microstructure and properties of the cladding layer are analised.Some of the effective experimental results show that the cladding layer is mainly composed of amorphous phase,α-Al phase and Al4 NiY intermetallic compound phase.The stirring of the rotating magnetic field increases the amorphous phase content of the cladding layer from 10.2% to 30.7% and could inhibit the recrystallization grain growth effectively in the process of multi-lap and multi-layer deposition.The residual stress is reduced and the grain structure is refined.The microhardness and tenacity are enhanced,the average microhardness increased from278 HV_(0.1) to 335 HV_(0.1) with less fluctuation.The average tensile strength is 303 MPa,110.2%of the matrix tensile specimen and the average elongation is 6.79%,33.1% of the matrix.
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