ARB法制备超细晶材料的组织与性能研究

Study of Microstructure and Mechanical Property of Ultra-fine Grain Material Process with ARB

采用累积叠轧焊方法(ARB)对MB2镁合金和1060工业纯铝进行试验,分析了它们变形前后内部微观组织结构的演变和力学性能的变化。结果表明,MB2镁合金平均晶粒细化到1.2μm,抗拉强度由轧制前的235 MPa提高到300 MPa;1060工业纯铝晶粒细化到约400 nm,抗拉强度由轧制前的87MPa提高到220 MPa,硬度由轧制前的37 HV提高到83 HV;2种材料的延伸率在ARB 1道次后下降,并随着轧制道次的增加,材料组织均匀程度提高,抗拉强度变化平缓;MB2镁合金的延伸率回升幅度较大。

This study was mainly focused on using accumulative roll bonding to test MB2 magnesium alloy and 1060 commercially pure aluminium.It was analyzed that changing of inner microstructure and mechanical property before and after the deformation of MB2 magnesium alloy and 1060 commercially pure aluminium.The results show that the average grain of MB2 magnesium was refined to 1.2 μm,tensile strength was increased from 87 MPa to 220 Mpa,and the hardness also increased from former 37 HV to 83 HV.The elongation percentage of the two materials was decreased after ARB 1 pass,and with the increasing of rolling pass,the uniformity degree of material structure increased.Tensile strength changed gently.The rising back range of elongation percentage of magnesium alloy is big.