ARB制备6063Al/MB2/6063Al复合材料的组织和性能

Microstructure and Propertries of 6063Al/MB2/6063Al Composite Prepared by Accumulative Roll Bonding

采用累积复合轧制(ARB)技术制备6063Al/MB2/6063Al多层结构复合材料,利用电子拉伸机、金相显微镜和扫描电镜研究了常温态和热处理后ARB不同变形道次复合材料的组织和性能变化。结果表明,ARB技术能够有效细化MB2层金属组织;ARB 2道次平均晶粒尺寸由16μm细化到2μm,随着轧制道次的增加,组织均匀性提高,但晶粒尺寸略有长大;抗拉强度总体呈先升后降的趋势,其中ARB 2道次最高,为192.5 MPa;复合材料伸长率在ARB 1、2道次轧制后变化不大,ARB 3～5道次轧制后复合材料的伸长率逐渐下降。

6063Al/MB2/6063Al composite with multi-layer structure was processed by accumulative roll bonding（ARB）.The effects of unannealing and annealing treatment on the microstructure and propertries of the composite were studied by electronic tensile machine,OM and SEM.The results show that,ARB technology can effectively refine the MB2 layer metal structure.The average grain size of MB2 layer after ARB 2 passes is refined from 16 μm to 2 μm.With the increase of rolling passes,the microstructure uniformly improves,but the grain size grows slightly.The tensile strength of the composite increases first and then decreases.The highest tensile strength is 192.5 MPa after ARB 2 passes.The elongation of cladding materials does not change significantly after ARB 1～2 passes,but gradually decrease after ARB 3～5 passes.