表面机械研磨处理固溶Cu-2wt%Ti合金的特征和性能  

Characteristics and Properties of Solid Solution Cu-2wt%Ti Alloy by Surface Mechanical Attrition Treatment

作　　者：林万明[1] 李岩[1] 侯利锋[1] 卫英慧[1] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《热加工工艺》2013年第4期137-140,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51001079);山西省基础研究项目(2011011020-1)

摘　　要：采用表面机械研磨处理(SMAT)的方法在铜钛合金表面制备了纳米晶组织。采用金相显微镜、X射线衍射仪、扫描电镜和显微硬度测试仪对SMAT试样的微观组织结构和性能进行了表征。实验结果表明:SMAT处理60 min后晶粒尺寸为30.5 nm。SMAT处理后,试样中出现了明显的分层现象及高密度的形变孪晶和交叉孪晶。SMAT处理后试样表面的硬度增大,沿深度成梯度分布。对SMAT试样进行时效处理后,表面硬度变化不大,但距表面40～50μm之间的硬度明显增大。Nano-structured surface layer on Cu-Ti alloy surface was produced by means of surface mechanical attrition treatment （SMAT）. The microstructure features and properties of the surface layer of SMATed samples were characterized using OM, XRD, SEM and microhardness testing machine. The results show that the grain size in the top surface of the samples treated for 60 min is 30.5 nm. The stratification phenomena occurres on the Cu-2wt%Ti alloy samples. High density deformation twin and crossover twin are observed in the samples. After aging treatment, the microhardness of the surface layer begins to keep stabilization, but the microhardness of the interface increases rapidly.

关 键 词：表面机械研磨处理 纳米化 塑性变形 铜 

分 类 号：TG146.1[一般工业技术—材料科学与工程]