Nanometer Stripe Microstructure of Supersaturated Solid Solution in Fe-Cu Alloy  

作　　者：REN Hui-ping WANG Hai-yan LIU Zong-chang AN Zhi-guo 

机构地区：[1]College of Material and Metallurgy Engineering, Inner Mongolia University of Science and Technology,Baotou 014010, Inner Mongolia, China

出　　处：《Journal of Iron and Steel Research International》2007年第1期64-68,共5页

基　　金：Item Sponsored by National Natural Science Foundation of China (50361001)

摘　　要：Strengthening due to precipitation of Cu in the a-Fe matrix is an important phenomenon utilized in the design of HSLA steels. In the present work, the microstructure of supersaturated solid solution in Fe-1.18%Cu binary alloy was investigated by means of high resolution electron microscopy. The results indicated that the solid solution was heterogeneous, there were lots of Cu atom clusters, which consisted of diffractive stripe microstructure similar to twin crystal. Orientation deviation was observed between two （110）o planes in diffractive stripes, which results in light and shade contrast. Furthermore, formation mechanisms of the nanometre stripe microstructure were discussed in terms of the interaction of Cu and Fe atoms in the Fe-Cu binary alloys.Strengthening due to precipitation of Cu in the a-Fe matrix is an important phenomenon utilized in the design of HSLA steels. In the present work, the microstructure of supersaturated solid solution in Fe-1.18%Cu binary alloy was investigated by means of high resolution electron microscopy. The results indicated that the solid solution was heterogeneous, there were lots of Cu atom clusters, which consisted of diffractive stripe microstructure similar to twin crystal. Orientation deviation was observed between two （110）o planes in diffractive stripes, which results in light and shade contrast. Furthermore, formation mechanisms of the nanometre stripe microstructure were discussed in terms of the interaction of Cu and Fe atoms in the Fe-Cu binary alloys.

关 键 词：Fe-Cu alloy supersaturated solid solution Cu-rich cluster nanometer stripe microstructure high resolution electron microscopy 

分 类 号：TG13[一般工业技术—材料科学与工程]