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Developing superplasticity and a deformation mechanism map for the Zn-Al eutectoid alloy processed by high-pressure torsion

Title
Developing superplasticity and a deformation mechanism map for the Zn-Al eutectoid alloy processed by high-pressure torsion
Author
Megumi Kawasaki
Keywords
Deformation mechanism maps; Flow mechanisms; High-pressure torsion; Superplasticity; Ultrafine grains
Issue Date
2011-07
Publisher
ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 권: 528 호: 19-20 페이지: 6140-6145
Abstract
A Zn-22% Al eutectoid alloy was processed by high-pressure torsion (HPT) for 1.3 and 5 turns at room temperature to produce an ultrafine grain size of similar to 350 nm. Tensile testing at a temperature of 473 K gave excellent superplastic properties with elongations to failure up to a maximum of 1800% at an imposed strain rate of 1.0 x 10(-1) s(-1): this is within the range of high strain rate superplasticity and represents the highest elongation recorded to date for a specimen processed by HPT. It is shown that the experimental data are in excellent agreement with a deformation mechanism map constructed for a temperature of 473 K. (C) 2011 Elsevier B.V. All rights reserved.
URI
www.sciencedirect.com/science/article/pii/S0921509311004849?via%3Dihubhttp://hdl.handle.net/20.500.11754/35834
ISSN
0921-5093
DOI
10.1016/j.msea.2011.04.053
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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