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Evaluating the Flow Processes in Ultrafine-grained Materials at Elevated Temperatures

Title
Evaluating the Flow Processes in Ultrafine-grained Materials at Elevated Temperatures
Author
Megumi Kawasaki
Keywords
deformation mechanism maps; equal-channel angular pressing; flow processes; high-pressure torsion; superplasticity
Issue Date
2013-05
Publisher
UNIV FED SAO CARLOS, DEPT ENGENHARIA MATERIALS
Citation
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, 16, 3, p565-p570,
Abstract
When polycrystalline materials are tested in tension at elevated temperatures, the flow mechanisms depend upon various parameters including the temperature of testing, the applied stress and the material grain size. The plotting of deformation mechanism maps is a procedure used widely in displaying and interpreting the creep properties of conventional coarse-grained metals but there have been few attempts to date to use this same procedure for ultrafine-grained and nanocrystalline materials produced through the application of severe plastic deformation (SPD). This report examines the potential for using deformation mechanism mapping for materials processed by SPD and presents examples for materials processed using equal-channel angular pressing and high-pressure torsion.
URI
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000300002&lng=en&tlng=en
ISSN
1516-1439
DOI
10.1590/S1516-14392013005000023
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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