STRENGTHENING MECHANISM IN METALS WITH NANO-SCALE TWINS

摘要：

Methods used to strengthen metals typically also cause a pronounced decrease in ductility.Here we review a novel approach to realize significant strengthening while maintaining a reasonable ductility by nanoscale coherent twins.By introducing a high density of nano-scale twins in pure Cu,high strength and good ductility are achieved simultaneously.Particularly,a maximum strength was found in the nanotvvinned Cu at a twin thickness of 15 nm,followed by a rapid softening and a monotonic enhancement in both the strain-hardening and ductility at smaller twin thicknesses.These unique properties and related dislocation-twin boundary strengthening mechanism differ fundamentally from the dislocation-grain boundary strengthening mechanism.

关键词： Nanoscale twins, strength,ductility,work hardening,defamation mechanism

作者: L.Lu K.LU

作者单位: Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,72 Wenhua Road,Shenyang 110016,P.R.China

会议类型: 国际会议

会议名称: The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)

会议地点: 上海

会议语种:英文

页码: 630-634

在线出版日期: 2011-05-22（万方平台首次上网日期，不代表论文的发表时间）