磁场辅助激光熔覆铝基金属玻璃覆层

为提高铝合金的表面性能，采用磁场辅助激光熔覆的方法在5083铝合金表面制备了Al-Ni-Y-Co-La五元金属玻璃熔覆层，并对其进行组织成分及性能分析。实验结果表明：熔覆层主要由非晶相、α-Al相以及Al₄NiY等金属间化合物组成，旋转磁场的搅拌作用使熔覆层非晶相含量由10.2%提高到30.7%，且能够有效抑制多道搭接和多层堆积过程中重熔区晶粒的生长，细化了熔覆层晶粒组织，降低了残余应力，提高了显微硬度及韧性，使其平均显微硬度从278 HV_0.1提高至335 HV_0.1，且波动较小，平均抗拉强度为303 MPa，为基体拉伸件的110.2%，平均伸长率为6.79%，为基体的33.1%。

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

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 Al4NiY 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 from 278 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.