Solute Distribution and Mechanical Properties of Ultra-Fine-Grained Al-Mg Alloys

被引：0

作者：

Karnesky, Richard A. ^{[1
]}

Yang, Nancy Y. C. ^{[1
]}

Marchi, Chris San ^{[1
]}

Topping, Troy D. ^{[2
]}

Zhang, Zhiui ^{[2
]}

Li, Ying ^{[2
]}

Lavernia, Enrique J. ^{[2
]}

机构：

[1] Sandia Natl Labs, 7011 East Ave, Livermore, CA 94550 USA

[2] Univ Calif Davis, Davis, CA 95616 USA

来源：

PROCEEDINGS OF THE 13TH INTERNATIONAL CONFERENCE ON ALUMINUM ALLOYS (ICAA13) | 2012年

基金：

美国能源部;

关键词：

atom-probe tomography; cryomilled; magnesium; nanocrystalline; SPECIMEN PREPARATION; BEHAVIOR; MICROSTRUCTURE; DEFORMATION; TEMPERATURE; DUCTILITY; STRENGTH; SIZE;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Ultra-fine-grained (d similar to 200 nm) Al-Mg alloys exhibit outstanding strength due to both Hall-Petch grain-size strengthening and solid-solution strengthening. When the solubility limit is exceeded, some Mg segregates to grain boundaries. This impacts both thermal stability and mechanical properties. In this study, alloys with between 0 wt.% Mg (pure Al) and 10.5 wt.% Mg are made by ball milling powders in liquid nitrogen, and consolidated by hot isostatic pressing and extrusion. The alloys are exposed to temperatures up to 500 deg. C. Microhardness and tensile behavior are measured and correlated with the microstructure, as measured by local-electrode atom-probe tomography, X-ray diffraction, and electron microscopy.

引用

页码：1033 / 1038

页数：6

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