Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)
- 2006.09a
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- Pages.126-127
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- 2006
High Temperature Deformation Behavior of Nano Grain W Produced by SPD-PM Process
- Oda, Eiji (Graduate school, Ritsumeikan University) ;
- Ohtaki, Takao (Graduate school, Ritsumeikan University) ;
- Kuroda, Akio (Graduate school, Ritsumeikan University) ;
- Fujiwara, Hiroshi (Research Organization of Science and Engineering, Ritsumeikan University) ;
- Ameyama, Kei (Faculty of Science and Engineering, Ritsumeikan University) ;
- Yoshida, Kayo (Toshiba Materials Co., Ltd.)
- Published : 2006.09.24
Abstract
In this study, nano grain W is fabricated by Severe Plastic Deformation-Powder Metallurgy (SPD-PM) process. W powder and W-Re powder mixtures are processed by SPD-PM process, a Mechanical Milling (MM) process. As results, a nano grain structure, whose grain size is approximately 20nm, is obtained in W powder after MM for 360ks. A nano grain W compact, whose grain size 630nm, has excellent deformability above 1273K. A nano grain W-10Re compact is composed of equiaxed grain, a grain growth is restrained and has low dislocation density after the large deformation; therefore it is considered that W-Re compact shows superplasticity.