Harmonic-structured copper: performance and proof of fabrication concept based on severe plastic deformation of powders

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• 作者：Choncharoen Sawangrat (1)
  Shota Kato (1)
  Dmitry Orlov (2) (3)
  Kei Ameyama (4)
  
• 刊名：Journal of Materials Science
• 出版年：2014
• 出版时间：October 2014
• 年：2014
• 卷：49
• 期：19
• 页码：6579-6585
• 全文大小：1,356 KB
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• 作者单位：Choncharoen Sawangrat (1)
  Shota Kato (1)
  Dmitry Orlov (2) (3)
  Kei Ameyama (4)
  
  1. Advanced Materials Laboratory, Department of Mechanical Engineering, Faculty of Science and Engineering, Ritsumeikan University, Biwako Kusatsu Campus, 1-1-1 Noji-Higashi, Kusatsu, Shiga, 525-8577, Japan
  2. Research Organization of Science and Technology, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga, Japan
  3. Materials Research Laboratory, University of Nova Gorica, Vipavska cesta 13, 5000, Nova Gorica, Slovenia
  4. Department of Mechanical Engineering, College of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga, Japan
  
• ISSN：1573-4803

文摘

Pure copper (Cu) having bimodal ‘harmonic structure-(HS) was fabricated by a technique based on severe plastic deformation of powders, which involved tailored mechanical milling and spark plasma sintering. The harmonic-structured Cu demonstrates a unique combination of high strength and large elongation superior to its homogeneous as well as bimodal heterogeneous counterparts. Specific features of harmonic structure, i.e. continuous network of ultra-fine grained (UFG) regions encompassing coarse-grained areas, lead to the extension of uniform elongation. The optimum combination of properties in pure Cu is found to be in the harmonic-structured material having 40?% UFG fraction.