叠轧法深度塑性变形铜组织的研究  

Research of Severe Plastic Deformation Microstructures of Pure Copper Produced by Accumulative Rolling-Bonding

作　　者：陈亮维[1,2] 史庆南[1] 陈登权[2] 王军丽[1] 谢明[2] 

机构地区：[1]昆明理工大学测试中心,云南昆明650093 [2]昆明贵金属研究所,云南昆明650106

出　　处：《昆明理工大学学报（理工版）》2008年第6期11-16,共6页Journal of Kunming University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(项目编号:50564005);云南省重点基金资助项目(项目编号:2003E003Z)

摘　　要：用X-射线衍射分析法检测了异步叠轧和同步叠轧制备变形量不小于98.4%纯铜样品的变形织构、残余应力、位错密度、晶格点阵常数和晶粒大小,测试了加工态样品的维氏硬度.结果表明,异步叠轧铜变形织构是剪切织构{100}<011>,同步叠轧铜的变形织构是铜织构{112}<111>;异步叠轧和同步叠轧对晶粒大小、位错密度、微观应变、晶格点阵常数和硬度等没有显著影响;硬度、残余应力、位错密度、晶格点阵常数和晶粒大小随变形量的增大分别趋向一个常数.这暗示无限叠轧不能无限地细化晶粒.X- ray diffraction （XRD） is used to respectively test deformation textures, residual stress, dislocation densities, crystal lattice constants and grain sizes of pure copper （ ≥98.4% strain） produced by asymmetrical accumulative rolling- bonding （AARB） and by traditional accumulative roiling -bonding （TARB）. Vickers hardnesses of samples in deformed state are tested too. It is shown through the results that deformation textures of samples are shear textures {100} 〈011 〉 by AARB, and copper textures { 112} 〈111 〉 by TARB, that hardnesses, residual stresses, dislocation densities, crystal lattice constants and grain sizes of samples produced by AARB and TARB respectively are nearly similar, and that hardnesses, residual stresses, dislocation densities, crystal lattice constants and grain sizes of samples tend to a constant with increasing strain. It is implied that grain sizes can not refine in infinity with increasing strain by ARB.

关 键 词：铜 叠轧 织构 残余应力 位错密度 

分 类 号：TG331[金属学及工艺—金属压力加工]