Journal
JOURNAL OF MATERIALS SCIENCE
Volume 49, Issue 19, Pages 6579-6585Publisher
SPRINGER
DOI: 10.1007/s10853-014-8258-4
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Funding
- Japan Science and Technology Agency (JST) under Collaborative Research Based on Industrial Demand 'Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials'
- MEXT, Japan [22102004]
- Grants-in-Aid for Scientific Research [22102004] Funding Source: KAKEN
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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.
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