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The characteristics of two-phase Al-Cu and Zn-Al alloys processed by high-pressure torsion

Title
The characteristics of two-phase Al-Cu and Zn-Al alloys processed by high-pressure torsion
Author
Megumi Kawasaki
Issue Date
2014-06
Publisher
Institute of Physics Publishing
Citation
In: IOP Conference Series: Materials Science and Engineering, 6th International Conference on Nanomaterials by Severe Plastic Deformation, NanoSPD 2014. (IOP Conference Series: Materials Science and Engineering, 2014, 63(1))
Abstract
Experiments were conducted on two different two-phase alloys, the Al-33% Cu eutectic and the Zn-22% Al eutectoid. These alloys were processed by high-pressure torsion (HPT) and then measurements were taken to determine the distributions of hardness values across the disk diameters and tensile tests were conducted to examine the potential for achieving superplastic elongations. Both alloys showed grain refinement through the HPT processing but the Al-Cu alloy exhibited a conventional work-hardening with torsional straining whereas the Zn-Al alloy exhibited a work-softening due to the loss of Zn-rich precipitates under the high imposed pressure. Excellent superplastic elongations were achieved in both alloys when pulled in tension at elevated temperatures with a maximum elongation of 1800% in the Zn-Al alloy.
URI
http://iopscience.iop.org/article/10.1088/1757-899X/63/1/012106/metahttp://hdl.handle.net/20.500.11754/46763
ISSN
1757-899X; 1757-8981
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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