TY - JOUR
T1 - Effect of temperature rise on microstructural evolution during high-pressure torsion
AU - Edalati, Kaveh
AU - Hashiguchi, Yuki
AU - Pereira, Pedro Henrique R.
AU - Horita, Zenji
AU - Langdon, Terence G.
N1 - Funding Information:
We thank Prof. Alexander P. Zhilyaev of Russian Academy of Sciences for insightful discussion. This study was supported in part by Grant-in-Aids for Scientific Research from the MEXT, Japan (No. 16H04539 and No. 26220909 ). Two of the authors were supported by the European Research Council under Grant Agreement No. 267464-SPDMETALS (PHRP and TGL). The HPT process was carried out in the International Research Center on Giant Straining for Advanced Materials (IRC-GSAM) at Kyushu University.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/1/31
Y1 - 2018/1/31
N2 - Dynamic recrystallization occurs at room temperature during high-pressure torsion (HPT) leading to the formation of ultrafine grains with high angles of misorientation. There are questions concerning whether dynamic recrystallization occurs due to the temperature rise during severe plastic deformation or due to the effect of lattice defects. In this study, the real temperature rise was measured by directly placing a thermocouple separately on disc samples of tin, aluminum, silver, copper and titanium. The measurements, which are consistent with finite element simulations, show that the temperature rise is of minor significance in initiating dynamic recrystallization. A relationship is developed to predict the temperature rise in HPT.
AB - Dynamic recrystallization occurs at room temperature during high-pressure torsion (HPT) leading to the formation of ultrafine grains with high angles of misorientation. There are questions concerning whether dynamic recrystallization occurs due to the temperature rise during severe plastic deformation or due to the effect of lattice defects. In this study, the real temperature rise was measured by directly placing a thermocouple separately on disc samples of tin, aluminum, silver, copper and titanium. The measurements, which are consistent with finite element simulations, show that the temperature rise is of minor significance in initiating dynamic recrystallization. A relationship is developed to predict the temperature rise in HPT.
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U2 - 10.1016/j.msea.2017.12.095
DO - 10.1016/j.msea.2017.12.095
M3 - Article
AN - SCOPUS:85039870871
SN - 0921-5093
VL - 714
SP - 167
EP - 171
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -