累积叠轧Mg-Li/Al复合板组织及力学性能
Microstructure and Mechanical Properties of ARB Processed Mg-Li /Al Sheet
采用累积叠轧技术成功地制备出Al/Mg-Li多层复合板材，研究了Al/Mg-Li多层复合板材在累积叠轧过程中的组织与力学性能演变。复合板的界面结合强度达到10.45MPa。随着累积叠轧道次的增加，Mg-Li合金中的α相和β相沿着轧制方向被拉长，呈现出明显的方向性，到5道次后，α相和β相均为细长的条状，且α相中的晶粒尺寸达到20μm，β相中的晶粒尺寸基本在5μm~10μm之间；而到6道次后，α相和β相由细长条状破碎后变成细小分散的颗粒，且分布十分均匀，此时β相的晶粒尺寸已经小于5μm。随累积叠轧道次的增加，复合板的力学性能明显提升，抗拉强度逐渐增大，Mg-Li合金与纯Al的显微硬度逐渐增大，到6道次后复合板的抗拉强度达到290.54MPa，Mg-Li合金与纯Al的显微硬度分别达到75.1HV、79.4HV。
l/Mg-Li clad sheets were fabricated by accumulative roll bonding(ARB), and the microstructure and mechanical properties of them were investigated. The bonding strength reaches 10.45MPa. With the increase of ARB passes, the α-Mg and β-Li phases are gradually elongated. The average grain size of the α-Mg phase in the fifth pass is about 20μm, and the average grain size of the β-Li phase is about 5μm~10μm. The α-Mg and β-Li phases break into small pieces and cause a uniform distribution, and the average grain size of the β-Li phase is smaller than 5μm. With the increase of ARB passes, the ultimate tensile strength of the composite plates, hardness of Mg-Li alloy and pure Al are all enhanced. In the sixth pass, the ultimate tensile strength is 290.54MPa, the hardness values of Mg-Li alloy and pure Al reaches 75.1HV, 79.4HV, respectively.
张密林、巫瑞智、张景怀、马旭东、侯乐干、李健
金属压力加工金属学、热处理材料科学
镁锂合金累积叠轧力学性能
Mg -Li alloyARBMechanical properties
张密林,巫瑞智,张景怀,马旭东,侯乐干,李健.累积叠轧Mg-Li/Al复合板组织及力学性能[EB/OL].(2017-08-21)[2025-08-11].http://www.paper.edu.cn/releasepaper/content/201708-84.点此复制
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