Tensile behavior of bulk nanocrystalline aluminum synthesized by hot extrusion of ball-milled powders

被引：78

作者：

Choi, H. J. ^{[1
]}

Lee, S. W. ^{[1
]}

Park, J. S. ^{[2
]}

Bae, D. H. ^{[1
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

[2] Hanbat Univ, Div Adv Mat Engn, Taejon 305719, South Korea

来源：

SCRIPTA MATERIALIA | 2008年 / 59卷 / 10期

关键词：

Nanocrystalline materials; Aluminium; Compression test; Tension test;

D O I：

10.1016/j.scriptamat.2008.07.030

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

The deformation behavior of bulk nanocrystalline aluminum down to 48 nm in grain size, produced by hot extrusion of ball-milled powders, has been evaluated by compression and tension tests. Isotropic yield stress increases following the Hall-Petch relationship with decreasing grain size down to 70 nm. However, a positive deviation in the relationship is found for grain sizes below 70 nm, and aluminum with a grain size of 48 nm exhibits a superior yield stress of 500 MPa with ductile failure. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1123 / 1126

页数：4

共 22 条

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Microstructure and mechanical behavior of nanocrystalline metals [J].