Charpy impact energy of nanocrystalline and polycrystalline cobalt

被引：39

作者：

Karimpoor, A. A. ^{[1
]}

Aust, K. T. ^{[1
]}

Erb, U. ^{[1
]}

机构：

[1] Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S 3E4, Canada

来源：

SCRIPTA MATERIALIA | 2007年 / 56卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

nanocrystalline materials; cobalt; impact behavior; fracture; hardness;

D O I：

10.1016/j.scriptamat.2006.10.018

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Charpy impact energy and microhardness of electrodeposited nanocrystalline cobalt (average grain size similar to 18 nm), as well as electrowon polycrystalline cobalt in as-deposited (average grain size similar to 1 mu m) and annealed (average grain size similar to 10 mu m) conditions, were studied. At room temperature nanocrystalline, as-deposited and annealed polycrystalline cobalt had impact energies of about 2, 6 and 9 J, and hardness values of about 5, 3 and 2.5 GPa, respectively. Finer dimples were observed on the fracture surfaces of nanocrystalline cobalt in comparison with polycrystalline cobalt. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：201 / 204

页数：4

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