期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 488, 期 1-2, 页码 117-124出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2007.12.046
关键词
hardness; high-pressure torsion; magnesium alloy; severe plastic deformation; superplasticity
类别
资金
- Light Metals Educational Foundation of Japan
- Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan
- National Science Foundation of the United States [DMR-0243331]
Experiments were conducted on a Mg-9% Al alloy to evaluate the microstructural characteristics and the tensile properties at elevated temperatures after processing by high-pressure torsion (HPT) at room temperature and at 423 K. Ultrafine grain sizes were achieved by processing samples in both an extruded and a cast condition. The results demonstrate the viability of using HPT as a processing technique for achieving significant grain refinement in magnesium alloys which are not processed easily by equal-channel angular pressing (ECAP). Superplastic ductilities were achieved in tensile testing at a temperature of 473 K with a maximum measured elongation of 810%. In general, higher superplastic elongations were achieved after processing by HPT at 423 K because of the development of some limited internal cracking when processing at room temperature. (C) 2008 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据