The 7075/6009 aluminum composite ingot with the diameter of 65 mm was prepared by double-stream-pouring continuous casting.The deformation behavior and the mechanical properties of the composite ingot compressed at 54...The 7075/6009 aluminum composite ingot with the diameter of 65 mm was prepared by double-stream-pouring continuous casting.The deformation behavior and the mechanical properties of the composite ingot compressed at 543,573,623,673 and 723 K were analyzed.The results show that the gradient distributions of composition and hardness in the transition layer of the composite plates still exist after plastic deformation of the ingots.Meanwhile,the thickness of the transition layer reduces from millimeter order to micrometer order.The mechanical properties of the composite plate increase with the increase in deformation temperature from 543 K to 673 K.The best mechanical properties of the 7075/6009 aluminum composite are:σb=381 MPa,σ0.2=322 MPa andδ=16.6%.The appropriate deformation temperature range is(0.75-0.85)TM,where TM is the melting point of 7075 alloy.展开更多
基金Project(50575076)supported by the National Natural Science Foundation of ChinaProject(NCET-07-0310)supported by the Program for New Century Excellent Talents in University of China
文摘The 7075/6009 aluminum composite ingot with the diameter of 65 mm was prepared by double-stream-pouring continuous casting.The deformation behavior and the mechanical properties of the composite ingot compressed at 543,573,623,673 and 723 K were analyzed.The results show that the gradient distributions of composition and hardness in the transition layer of the composite plates still exist after plastic deformation of the ingots.Meanwhile,the thickness of the transition layer reduces from millimeter order to micrometer order.The mechanical properties of the composite plate increase with the increase in deformation temperature from 543 K to 673 K.The best mechanical properties of the 7075/6009 aluminum composite are:σb=381 MPa,σ0.2=322 MPa andδ=16.6%.The appropriate deformation temperature range is(0.75-0.85)TM,where TM is the melting point of 7075 alloy.
