TY - JOUR
T1 - Grain refinement in copper under large strain deformation
AU - Belyakov, A.
AU - Sakai, T.
AU - Miura, H.
AU - Tsuzaki, K.
N1 - Funding Information:
ACKNOWLEDGEMENTS The authors acknowledge with gratitude the financial support received from the Ministry of Education, Science and Culture, Japan, under grants of scientific research. One of the authors (A.B.) would like to express his hearty thanks to the Japan Science and Technology Corporation for providing a STA Fellowship.
PY - 2001/11
Y1 - 2001/11
N2 - Structure evolution taking place in pure polycrystalline copper was studied in multiple compressions at room temperature. Rectangular samples were compressed with consequent change in the loading direction from pass to pass. The deformation behaviour at high strains of above 2 shows an apparent steady-state flow following a rapid rise in the flow stress at an early stage of deformation. The structural changes are characterized by the evolution of many mutually crossing subboundaries at low to moderate strains, finally followed by the development of very fine grains with medium- to large-angle boundaries at large strains. These new grains are concluded to be evolved by a kind of continuous reaction, that is continuous dynamic recrystallization (DRX). The grains developed under continuous DRX are much finer than expected from the extrapolation of discontinuous DRX data for hot deformation. An average grain size of about 0.2 μm evolved at room temperature is roughly similar to that for subgrains developed at preceding strains.
AB - Structure evolution taking place in pure polycrystalline copper was studied in multiple compressions at room temperature. Rectangular samples were compressed with consequent change in the loading direction from pass to pass. The deformation behaviour at high strains of above 2 shows an apparent steady-state flow following a rapid rise in the flow stress at an early stage of deformation. The structural changes are characterized by the evolution of many mutually crossing subboundaries at low to moderate strains, finally followed by the development of very fine grains with medium- to large-angle boundaries at large strains. These new grains are concluded to be evolved by a kind of continuous reaction, that is continuous dynamic recrystallization (DRX). The grains developed under continuous DRX are much finer than expected from the extrapolation of discontinuous DRX data for hot deformation. An average grain size of about 0.2 μm evolved at room temperature is roughly similar to that for subgrains developed at preceding strains.
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U2 - 10.1080/01418610108216659
DO - 10.1080/01418610108216659
M3 - Article
AN - SCOPUS:0000141561
SN - 0141-8610
VL - 81
SP - 2629
EP - 2643
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
IS - 11
ER -