Observations on the ductile-to-brittle transition in ultrafine-grained tungsten of commercial purity

被引：90

作者：

Zhang, Yue ^{[1
]}

Ganeev, Artur V. ^{[2
]}

Wang, Jing Tao ^{[1
]}

Liu, Jin Qiang ^{[1
]}

Alexandrov, Igor V. ^{[2
]}

机构：

[1] Nanjing Univ Sci & Technol, Dept Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China

[2] Ufa State Aviat Tech Univ, Ufa 450000, Russia

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 503卷 / 1-2期

关键词：

Tungsten; Ultrafine-grained; Ductile-to-brittle transition; MECHANICAL-PROPERTIES; FAILURE; DEFORMATION; PLASTICITY; BEHAVIOR; FRACTURE; SPALL;

D O I：

10.1016/j.msea.2008.07.074

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Rods of commercial-purity tungsten were subjected to severe plastic deformation by means of equal-channel angular pressing (ECAP). An ultrafine-grained (UFG) equiaxed microstructure with an average grain size of about 0.9 mu m was developed. Microhardness measurements in a wide range of temperatures suggest a ductile-to-brittle transition at temperatures below 350 degrees C in the UFG samples after ECAP. In contrast, the results on the as-received material suggest a ductile-to-brittle transition temperature above 483 degrees C. 0 2008 Elsevier B.V. All rights reserved.

引用

页码：37 / 40

页数：4

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