Internal Friction of Bend-Deformed Nanocrystalline Nickel by Mechanical Spectroscopy

被引：4

作者：

Li Ping-Yun ^{[1
]}

Zhang Xi-Yan ^{[2
]}

Wu Xiao-Lei ^{[3
]}

Huang Yi-Neng ^{[1
]}

Meng Xiang-Kang ^{[1
]}

机构：

[1] Nanjing Univ, Dept Phys, Dept Mat Sci & Engn, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[2] Chongqing Univ, Sch Mat Sci & Engn, Chongqing 400030, Peoples R China

[3] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2008年 / 25卷 / 12期

关键词：

D O I：

10.1088/0256-307X/25/12/043

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Internal friction of nanocrystalline nickel is investigated by mechanical spectroscopy from 360 K to 120 K. Two relaxation peaks are found when nanocrystalline nickel is bent up to 10% strain at room temperature and fast cooling. However, these two peaks disappear when the sample is annealed at room temperature in vacuum for ten days. The occurrence and disappearance of the two relaxation peaks can be explained by the interactions of partial dislocations and point defects in nanocrystalline materials.

引用

页码：4339 / 4341

页数：3

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