原位自生Fe3Al增强Cu基复合材料的组织和性能

Microstructure and Mechanical Properties of Fe3Al Reinforced Copper Matrix Composites Prepared by In-situ Reaction

通过XRD、OM、SEM、TEM和拉伸试验等手段,研究了不同Fe3Al含量和变形工艺对原位自生Fe3Al增强Cu基复合材料显微组织和力学性能的影响。结果表明,当Fe3Al含量增加时,复合材料晶粒明显细化;第二相以纳米尺度的Fe3Al为主,且均匀分布在Cu基体中;经过冷轧和退火处理后,晶粒进一步细化,同时强度得到提升。Fe和Al含量分别为10%的复合材料在经过90%冷轧变形和350℃×1h退火处理后,显微硬度(HV)和抗拉强度分别达到272和871MPa。

The effects of Fe3Al reinforced particles and deformation technology on microstructures and mechanical properties of the Fe3Al/Cu composites fabricated by in-situ reaction were investigated by XRD,OM,SEM,TEM and tensile testing.The results show that with the increase of Fe3Al contents,the grain size is decreased.The nanoscale Fe3Al particles are uniformly distributed in Cu matrix.After cold rolling and annealing,obvious grain refinement and significant increment in strength are observed.After 90%cold-rolling reduction,the hardness and strength of 10%Fe3Al/Cu composite containing 10%Fe and Al elements reach 272 HV and 871 MPa,respectively.