Vacancy-assisted hardening in nanostructured metals

被引：21

作者：

Su, L. H. ^{[2
]}

Lu, C. ^{[1
]}

Tieu, A. K.

He, L. Z. ^{[2
]}

Zhang, Y. ^{[3
]}

Wexler, D.

机构：

[1] Univ Wollongong, Fac Engn, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia

[2] Northeastern Univ, Sch Met & Mat, Shenyang 110004, Peoples R China

[3] Univ Wollongong, Inst Superconducting & Elect Mat, Fairy Meadow 2519, Australia

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 03期

关键词：

Nanostructured materials; Severe plastic deformation; Point defects; Deformation mechanism; SEVERE PLASTIC-DEFORMATION; GRAIN-REFINEMENT; PURITY ALUMINUM; CLUSTERS; ALLOYS; STRAIN;

D O I：

10.1016/j.matlet.2010.10.090

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bulk metals deformed by severe plastic deformation have some unusual phenomenon such as hardening by low temperature annealing. Commercial purity aluminum processed by equal channel angular pressing has been used to investigate the deformation mechanism during further annealing of the severed plastic deformed materials. It has been found that vacancy-type defects induced by severe plastic deformation are responsible for some unusual phenomena, such as hardening by annealing and softening by slight deformation in nanostructured metals. It is anticipated that the effective control of vacancy-type defects during SPD and consequent annealing process will be combined to attain an optimum combination of strength and ductility in nanostructured metals. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：514 / 516

页数：3

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