MICROSTRUCTURE EVOLUTION AND MECHANICAL PROPERTIES OF FCC METALLIC MATERIALS SUBJECTED TO EQUAL CHANNEL ANGULAR PRESSING
文献类型：期刊论文
| 作者 | Wu Shiding; An Xianghai; Han Weizhong; Qu Shen; Zhang Zhefeng |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2010-03-11 |
| 卷号 | 46期号:3页码:257-276 |
| 关键词 | equal channel angular pressing fcc metal microstructure grain refinement mechanical property |
| ISSN号 | 0412-1961 |
| DOI | 10.3724/SP.J.1037.2009.00748 |
| 通讯作者 | Zhang Zhefeng(zhfzhang@imr.ac.cn) |
| 英文摘要 | Microstructure evolution, grain refinement mechanism and mechanical properties of face-centered cubic (fcc) metallic materials, subjected to equal channel angular pressing (ECAP), were systematically investigated. According to the special shear deformation mode of ECAP, Al single crystals with different orientations and Cu bicrystals with different initial grain boundary directions were subjected to ECAP for one pass, and it is found that shear deformations both parallel and perpendicular to intersection plane play important roles in the ECAP process. Moreover, Al single crystals, Cu single crystals and polycrystalline Cu-3%Si (mass fraction) alloy with different stacking fault energies (SFEs) and special crystallographic orientations, subjected to ECAP for one pass, were selected to experimentally and analytically explore the combined effects of crystallographic orientation, SFE and grain size on deformation twinning behaviors in several fcc crystals. Furthermore, ultrafine grained (UFG) or nanocrystalline (NC) Cu-Al alloys with different Al contents were prepared using multiple-passes ECAP. The results show that the grain refinement mechanism is gradually transformed from dislocation subdivision to twin fragmentation, and the equilibrium grain size decreases with lowering the SFE of Cu-Al alloys. Meanwhile, the homogeneous microstructures of materials with high or low SEE are much more readily gained than those of medium-SFE metals. More significantly, the strength and uniform elongation can be simultaneously improved with lowering the SEE, i.e., the better strength-ductility combination is achieved in the Cu-Al alloy with lower SFE. |
| 资助项目 | National Natural Science Foundation of China[50171072] ; National Natural Science Foundation of China[50571102] ; National Natural Science Foundation of China[50625103] ; National Natural Science Foundation of China[50890173] ; National Natural Science Foundation of China[50841024] ; National Natural Science Foundation of China[50931005] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000276824000001 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/102343]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang Zhefeng |
| 作者单位 | Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu Shiding,An Xianghai,Han Weizhong,et al. MICROSTRUCTURE EVOLUTION AND MECHANICAL PROPERTIES OF FCC METALLIC MATERIALS SUBJECTED TO EQUAL CHANNEL ANGULAR PRESSING[J]. ACTA METALLURGICA SINICA,2010,46(3):257-276. |
| APA | Wu Shiding,An Xianghai,Han Weizhong,Qu Shen,&Zhang Zhefeng.(2010).MICROSTRUCTURE EVOLUTION AND MECHANICAL PROPERTIES OF FCC METALLIC MATERIALS SUBJECTED TO EQUAL CHANNEL ANGULAR PRESSING.ACTA METALLURGICA SINICA,46(3),257-276. |
| MLA | Wu Shiding,et al."MICROSTRUCTURE EVOLUTION AND MECHANICAL PROPERTIES OF FCC METALLIC MATERIALS SUBJECTED TO EQUAL CHANNEL ANGULAR PRESSING".ACTA METALLURGICA SINICA 46.3(2010):257-276. |
入库方式： OAI收割
来源：金属研究所
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