摘要
通常金属材料的强度、塑性、韧性随晶粒尺寸的减少而提高,尤其当晶粒细化到纳米尺度,其力学性能可望获得显著改善.现有的制备超细晶粒金属材料的方法、制造设备和工艺过程复杂,制备的材料成本高昂,品质和尺寸大小都受到限制.本文发展了一种利用冲击大变形制备纳米晶纯铜试样的新方法,并用XRD测量了制得材料的晶粒尺寸,证明此种简单高效的制备方法切实可行的。
Generally, the intensity, plasticity and flexibility of metals are enhanced with shrinking of the grain size, specially when metallic materials are fined to be nano-structured, their mechanical performance will be improved greatly. The methods currently used to produce ultra-fined grain （nano-size） metals require large equipments, complex process and high costs, while the quality and dimensions of the products are limited. This paper is aimed to developing a new method in which severe plastic deformation （SPD） under impact loading is conducted to fine nano-structured pure copper. The XRD examinations indicate that the method proposed is effective and feasible.
出处
《宁波大学学报（理工版）》
CAS
2006年第4期481-485,共5页
Journal of Ningbo University：Natural Science and Engineering Edition
基金
新加坡国际合作项目
关键词
超细晶粒
高应变率
超大塑性变形
nano-gain copper
high strain rate
severe plastic deformation
