Journal
JOURNAL OF MATERIALS SCIENCE
Volume 49, Issue 19, Pages 6689-6695Publisher
SPRINGER
DOI: 10.1007/s10853-014-8362-5
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Funding
- Indonesian Government through the Directorate of Higher Education Program (DGHE)
- Light Metals Educational Foundation of Japan
- MEXT, Japan, in Innovative Areas Bulk Nanostructured Metals [22102004]
- Grants-in-Aid for Scientific Research [22102004] Funding Source: KAKEN
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An Al-6 %Cu-0.4 %Zr alloy was processed by high-pressure torsion to produce an ultrafine-grained structure with a grain size of similar to 200 nm at the steady-state level where the hardness remains constant with straining. Tensile testing showed that a maximum elongation of similar to 530 % was attained at 673 K with an initial strain rate of 1 x 10(-3) s(-1). Evaluation of the strain-rate sensitivity and the activation energy for the deformation confirmed that grain boundary sliding through grain boundary diffusion is the rate-controlling process for the superplastic deformation.
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