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Achieving homogeneity in a Cu-Zr alloy processed by high-pressure torsion

Title
Achieving homogeneity in a Cu-Zr alloy processed by high-pressure torsion
Author
Megumi Kawasaki
Keywords
ULTRAFINE-GRAINED COPPER; STACKING-FAULT ENERGY; HIGH-PURITY ALUMINUM; MICROSTRUCTURAL EVOLUTION; MECHANICAL-PROPERTIES; SUPERPLASTIC FLOW; PURE ALUMINUM; MICROHARDNESS; DEFORMATION; STRAIN
Issue Date
2012-11
Publisher
SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Citation
JOURNAL OF MATERIALS SCIENCE 권: 47 호: 22 페이지: 7782-7788
Abstract
A copper alloy, Cu-0.1 %Zr, was subjected to severe plastic deformation at room temperature using quasi-constrained high-pressure torsion. Disks were strained through different numbers of revolutions up to a maximum of ten turns under an applied pressure of 6.0 GPa and then examined to evaluate the evolution in the Vickers microhardness, Hv, and the microstructure. The results show lower values of Hv in the center regions of the disks in the early stages of processing but a gradual evolution to a high degree of hardness homogeneity after five and ten turns. Under conditions of hardness homogeneity, the distributions of the grain boundary misorientations are essentially identical at the center and the periphery of the sample. Homogeneity was further confirmed by conducting tensile testing at elevated temperatures where similar stress-strain curves and similar elongations to failure were recorded after processing through five and ten turns of HPT.
URI
http://link.springer.com/article/10.1007%2Fs10853-012-6587-8http://hdl.handle.net/20.500.11754/43014
ISSN
0022-2461
DOI
10.1007/s10853-012-6587-8
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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