TY - GEN
T1 - Fine-grained structure formation in Al- Mg- Sc alloy during hot ECAP
AU - Sitdikov, O.
AU - Kaibyshev, R.
AU - Avtokratova, E.
AU - Tsuzaki, K.
PY - 2006
Y1 - 2006
N2 - Grain refinement taking place during equal channel angular pressing (ECAP) was studied in a commercial Al-6%Mg-0.4%Mn-0.3%Sc alloy at a temperature of 4500C. Inhomogeneous deformation occurring during hot ECAP of the present alloy leads to formation of deformation bands. Repeated ECAP results in mutual crossing and increase in number and misorientation of deformation bands, followed by transformation of boundaries of deformation bands into high angle boundaries. As a result, a new fine-grained microstructure with an average crystallite size of 2.8 μm develops at large strains above 8. It is concluded that grain refinement occurs in accordance with deformation-induced continuous reactions; that is essentially similar to continuous dynamic recrystallization. The mechanisms of new grain evolution, as well as factors promoting grain refinement, are discussed in detail.
AB - Grain refinement taking place during equal channel angular pressing (ECAP) was studied in a commercial Al-6%Mg-0.4%Mn-0.3%Sc alloy at a temperature of 4500C. Inhomogeneous deformation occurring during hot ECAP of the present alloy leads to formation of deformation bands. Repeated ECAP results in mutual crossing and increase in number and misorientation of deformation bands, followed by transformation of boundaries of deformation bands into high angle boundaries. As a result, a new fine-grained microstructure with an average crystallite size of 2.8 μm develops at large strains above 8. It is concluded that grain refinement occurs in accordance with deformation-induced continuous reactions; that is essentially similar to continuous dynamic recrystallization. The mechanisms of new grain evolution, as well as factors promoting grain refinement, are discussed in detail.
UR - http://www.scopus.com/inward/record.url?scp=33847271913&partnerID=8YFLogxK
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U2 - 10.4028/0-87849-985-7.721
DO - 10.4028/0-87849-985-7.721
M3 - Conference contribution
AN - SCOPUS:33847271913
SN - 0878499857
SN - 9780878499854
T3 - Materials Science Forum
SP - 721
EP - 726
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 -