Research output: Contribution to journal › Article
Strength, grain refinement and solute nanostructures of an Al-Mg-Si alloy (AA6060) processed by high-pressure torsion. / Sha, G.; Tugcu, K.; Liao, X.Z.; Trimby, P.W.; Murashkin, M.Y.; Valiev, R.Z.; Ringer, S.P.
In: Acta Materialia, Vol. 63, 2014, p. 169-179.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Strength, grain refinement and solute nanostructures of an Al-Mg-Si alloy (AA6060) processed by high-pressure torsion
AU - Sha, G.
AU - Tugcu, K.
AU - Liao, X.Z.
AU - Trimby, P.W.
AU - Murashkin, M.Y.
AU - Valiev, R.Z.
AU - Ringer, S.P.
PY - 2014
Y1 - 2014
N2 - The effects of high-pressure torsion (HPT) processing on an Al-Mg-Si alloy (AA6060) have been investigated comprehensively. We show that the processing temperature has complex effects on the strength, grain refinement and solute nanostructures of the alloy. Ten-revolution HPT processing at room temperature produced the highest yield strength of 475 MPa, which is similar to a high-strength Al alloy. However, processing at 100 degrees C produced the finest grains due to the strong solute segregation to grain boundaries and the formation of high-density precipitates that pin grain boundaries. Processing at 180 degrees C led to significant decomposition of the alloy and the formation of coarse precipitates. This research demonstrates that solute nanostructures provide key information for unravelling the origins of HPT-induced strengthening and grain refinement, and reveals the important opportunities for "engineering" solute nanostructures to enhance grain refinement in HPT processing. (C) 2013 Acta Materialia In
AB - The effects of high-pressure torsion (HPT) processing on an Al-Mg-Si alloy (AA6060) have been investigated comprehensively. We show that the processing temperature has complex effects on the strength, grain refinement and solute nanostructures of the alloy. Ten-revolution HPT processing at room temperature produced the highest yield strength of 475 MPa, which is similar to a high-strength Al alloy. However, processing at 100 degrees C produced the finest grains due to the strong solute segregation to grain boundaries and the formation of high-density precipitates that pin grain boundaries. Processing at 180 degrees C led to significant decomposition of the alloy and the formation of coarse precipitates. This research demonstrates that solute nanostructures provide key information for unravelling the origins of HPT-induced strengthening and grain refinement, and reveals the important opportunities for "engineering" solute nanostructures to enhance grain refinement in HPT processing. (C) 2013 Acta Materialia In
U2 - 10.1016/j.actamat.2013.10.022
DO - 10.1016/j.actamat.2013.10.022
M3 - Article
VL - 63
SP - 169
EP - 179
JO - Acta Materialia
JF - Acta Materialia
SN - 1359-6454
ER -
ID: 7038403