Deformation Induced Internal Friction Peaks in Nanocrystalline Nickel  

作　　者：LI Ping-Yun ZHANG Xi-Yan NI Hai-Tao CAO Zhen-Hua MENG Xiang-Kang 李平云;张喜燕;倪海涛;操振华;孟祥康(Department of Materials Science and Engineering,National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093;School of Materials Science and Engineering,Chongqing University,Chongqing 400030)

机构地区：[1]Department of Materials Science and Engineering,National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093 [2]School of Materials Science and Engineering,Chongqing University,Chongqing 400030

出　　处：《Chinese Physics Letters》2012年第2期159-162,共4页中国物理快报（英文版）

基　　金：Supported by the PAPD(9114021305);the Fundamental Research Funds for the Central Universities of China(1112021302,CDJXS11132225);the National Natural Science Foundation of China(50831004,51001060,11004098,51171078);the National Basic Research Program of China(2010CB631004).

摘　　要：We report the mechanical spectroscopy study of the cold-rolling induced dynamical behavior of crystalline defects in nanocrystalline (NC) nickel The results show that internal friction (IF) peaks in NC nickel can be induced by cold-rolling.An IF peak,originating from dislocation activity,occurs when the strain is in the range of 9.7- 32.8%.Two Bordoni peaks occur when the strain is 39.0% and an IF peak associated with deformation twinning appears when the strain is 42.6%.These results mean that deformation of NC nickel is mediated by different kinds of defects as the strain increases.

关 键 词：DEFORMATION FRICTION NICKEL 

分 类 号：TG1[金属学及工艺—金属学]