TY - JOUR
T1 - Temperature dependence of effective stress in severely deformed ultralow-carbon steel
AU - Tanaka, Masaki
AU - Higashida, Kenji
N1 - Funding Information:
This work was partly supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, under a Grant-in-Aid for Scientific Research on Innovative Area titled ?Bulk Nanostructured Metals? [contract number 22102006] and by the Japan Society for the Promotion of Science under a Grant-in-Aid for Scientific Research (KAKENHI) [contract number 15H04147].
Publisher Copyright:
© 2016 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016/7/2
Y1 - 2016/7/2
N2 - The effects of severe plastic deformation on the thermal activation of dislocation gliding in ultralow-carbon steel at low temperatures were investigated. This was done by measuring the temperature dependences of the effective stress, activation volume and activation energy. It was found that the values of all these parameters were lower than those for coarse-grained specimens at low temperatures. In coarse-grained materials, the activation energy should increase with a decrease in the effective stress. This phenomenon, which seemed counterintuitive initially, could be physically interpreted on the basis of the fluctuation in the athermal stress.
AB - The effects of severe plastic deformation on the thermal activation of dislocation gliding in ultralow-carbon steel at low temperatures were investigated. This was done by measuring the temperature dependences of the effective stress, activation volume and activation energy. It was found that the values of all these parameters were lower than those for coarse-grained specimens at low temperatures. In coarse-grained materials, the activation energy should increase with a decrease in the effective stress. This phenomenon, which seemed counterintuitive initially, could be physically interpreted on the basis of the fluctuation in the athermal stress.
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U2 - 10.1080/14786435.2016.1183828
DO - 10.1080/14786435.2016.1183828
M3 - Article
AN - SCOPUS:84973115692
VL - 96
SP - 1979
EP - 1992
JO - Philosophical Magazine
JF - Philosophical Magazine
SN - 1478-6435
IS - 19
ER -