TY - GEN
T1 - Developing a model for grain refinement in equal-channel angular pressing
AU - Xu, Cheng
AU - Furukawa, Minoru
AU - Horita, Zenji
AU - Langdon, Terence G.
PY - 2006
Y1 - 2006
N2 - It is now recognized that processing by equal-channel angular pressing (ECAP) leads to very significant grain refinement in polycrystalline materials with the as-pressed grains typically having sizes within the submicrometer range. Furthermore, the materials produced by ECAP exhibit many useful properties including a high strength at ambient temperatures and, if these ultrafine grains are retained to elevated temperatures, a potential for superplastic forming. This paper examines the fundamental characteristics of grain refinement by making use of two sets of experimental observations: experimental data obtained from the pressing of aluminum single crystals through one pass of ECAP and hardness measurements taken on polycrystalline aluminum for samples subjected to ECAP for up to a total of eight passes. These experimental results are used to develop a microstructural model that provides a satisfactory explanation for the grain refinement occurring in ECAP.
AB - It is now recognized that processing by equal-channel angular pressing (ECAP) leads to very significant grain refinement in polycrystalline materials with the as-pressed grains typically having sizes within the submicrometer range. Furthermore, the materials produced by ECAP exhibit many useful properties including a high strength at ambient temperatures and, if these ultrafine grains are retained to elevated temperatures, a potential for superplastic forming. This paper examines the fundamental characteristics of grain refinement by making use of two sets of experimental observations: experimental data obtained from the pressing of aluminum single crystals through one pass of ECAP and hardness measurements taken on polycrystalline aluminum for samples subjected to ECAP for up to a total of eight passes. These experimental results are used to develop a microstructural model that provides a satisfactory explanation for the grain refinement occurring in ECAP.
UR - http://www.scopus.com/inward/record.url?scp=35248883858&partnerID=8YFLogxK
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U2 - 10.4028/0-87849-985-7.19
DO - 10.4028/0-87849-985-7.19
M3 - Conference contribution
AN - SCOPUS:35248883858
SN - 0878499857
SN - 9780878499854
T3 - Materials Science Forum
SP - 19
EP - 24
BT - Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
PB - Trans Tech Publications Ltd
T2 - 3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
Y2 - 22 September 2005 through 26 September 2005
ER -