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Advances in Materials Science and Engineering
Volume 2011 (2011), Article ID 509457, 7 pages
http://dx.doi.org/10.1155/2011/509457
Research Article

Low-Temperature Strengths and Ductility of Various Tungsten Sheets

1Department of Applied Physics, Okayama University of Science, 1-1 Ridai-cho, Okayama 700-0005, Japan
2International Research Center for Nuclear Materials Science, IMR, Tohoku University, Ibaraki, Oarai 311-1313, Japan

Received 18 March 2011; Accepted 6 June 2011

Academic Editor: Kin Ho Lo

Copyright © 2011 Yutaka Hiraoka and Hiroaki Kurishita. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We used three kinds of tungsten sheets in this study. First, we examined microstructure such as grain size distribution using an optical microscope. Secondly, we carried out three-point bend tests at temperatures between about 290 and 500 K. Then, we examined fracture surface of a failed specimen using a scanning electron microscope. Lastly, by analyzing all these results, we evaluated apparent intergranular and transgranular fracture strengths and discussed strengths and ductility of tungsten. Additionally, we compared mechanical properties of tungsten with those of molybdenum.