Effect of heat-treatment on microstructure and properties of SiC particulate-reinforced aluminum matrix composite
The effects of solid solution and aging processing on the microstructures and mechanical properties of the multi-layer spray co-deposited 7090Al/SiCp composite were investigated.The experimented results show that fine grains and homogeneous microstructures can be obtained,the average grain size of the as-solid solution treated and as-aged composites after extrusion is under 3.0 μm.A large amount of the Cu-rich phase particles form in the as-extruded samples,and solve into the matrix after solid solution treatment.After aging,the size of the precipitate phases,mainly MgZn2 and CuAl2 is less than 1.0 μm,which homogeneously distribute inside the grains and at the grain boundaries.The ultimate tensile strength of the composite treated at T6 state,i.e.solid solution treated at 475 for ℃ 1 h then aged at 120 for 24 ℃ h,is up to 765 MPa.
aluminum matrix composite spray deposition heat-treatment fracture morphology
SUN You-ping YAN Hong-ge CHEN Zhen-hua ZHANG Hao
College of Materials Science and Engineering,Hunan University,Changsha 410082,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）