Superplasticity in a Mg-8 mass%Li Two-Phase Alloy Processed by an ECAP Method
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- Furui Mitsuaki
- Department of System Engineering of Materials and Life Science, Faculty of Engineering, University of Toyama
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- Xu Cheng
- Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California
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- Aida Tetsuo
- Department of Mechanical and Intelligent System Engineering, Faculty of Engineering, University of Toyama
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- Inoue Makoto
- Department of Ecomaterials Engineering, Toyama National College of Technology
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- Anada Hiroshi
- Department of System Engineering of Materials and Life Science, Faculty of Engineering, University of Toyama
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- Langdon Terence G.
- Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California
Bibliographic Information
- Other Title
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- ＥＣＡＰ加工を施したＭｇ‐８ｍａｓｓ％Ｌｉ２相合金の超塑性
- ECAP加工を施したMg-8 mass%Li2相合金の超塑性
- ECAP カコウ オ ホドコシタ Mg 8 massパーセントLi2 ソウ ゴウキン ノ チョウソセイ
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Abstract
Significant phase refinement and dispersion were achieved in a cast Mg-8 mass%Li alloy through processing by equal-channel angular pressing (ECAP) using a die having an internal channel angle of 110° and a pressing temperature of 473 K. Following extrusion and subsequent ECAP through 2 passes, the alloy exhibited superplasticity over the temperature range from 423 to 473 K. A maximum fracture elongation of >950% was attained at 473 K with an initial strain rate of 1.0×10-4 s-1. The measured strain rate sensitivity was of the order of 0.6. The maximum elongation is high in comparison with other Mg alloys tested in tension at the same temperature and strain rate. The activation energy for superplastic flow was essentially equal to the value for grain boundary diffusion of Mg. The use of ECAP gives a significant improvement in strength and ductility at room temperature.<br>
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 70 (9), 729-734, 2006
The Japan Institute of Metals and Materials
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Keywords
Details 詳細情報について
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- CRID
- 1390282681456637056
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- NII Article ID
- 10018249582
- 130004455757
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL BIB ID
- 8524494
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed