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Achieving superplastic properties in a Pb-Sn eutectic alloy processed by equal-channel angular pressing

Title
Achieving superplastic properties in a Pb-Sn eutectic alloy processed by equal-channel angular pressing
Author
Megumi Kawasaki
Keywords
Initial Strain Rate; Superplastic Flow; Channel Angle; Superplastic Material; Intermediate Strain Rate
Issue Date
2011-01
Publisher
Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles 90089-1453 USA, 2Department of Materials Engineering, Federal University of Sao Carlos, Sao Carlos 13565-905 Brazil
Citation
Journal of Materials Science. Jan2011, Vol. 46 Issue 1, p155-160. 6p. 1 Black and White Photograph, 2 Charts, 4 Graphs.
Abstract
Experiments were conducted on a Pb-62% Sn eutectic alloy containing 160 ppm of Sb. The alloy was processed by equal-channel angular pressing (ECAP) through 1 to 5 passes at room temperature and then tested in tension at a temperature of 423 K using initial strain rates from 1.0 × 10 to 1.0 × 10 s. Excellent superplastic elongations were achieved at intermediate strain rates with a maximum elongation to failure of 2,665%. It is shown that, for processing through similar numbers of ECAP passes, these elongations are higher than in an earlier investigation using a Pb-62% Sn alloy of higher purity. The results are presented pictorially in the form of a deformation mechanism map by plotting normalized grain size against normalized stress at a temperature of 423 K.
URI
http://link.springer.com/article/10.1007%2Fs10853-010-4889-2http://repository.hanyang.ac.kr/handle/20.500.11754/72736
ISSN
0022-2461; 1573-4803
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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