TY - JOUR
T1 - Characterization of dynamic microstructure evolution during hot deformation of Al-4.10Cu-1.42Mg-0.57Mn-0.12Zr alloy
AU - Liu, Can
AU - Zhang, Hui
AU - Jiang, Fu Lin
N1 - Funding Information:
Foundation item: Project (2009CB623704) supported by the National Basic Research (973) Program of China; Project (20130161110007) supported by the Doctoral Program of the Ministry of Education, China; Project (CX2013B128) supported by Hunan Provincial Innovation Foundation for Postgraduate, China Corresponding author: Hui ZHANG; Tel: +86-731-88664086; Fax: +86-731-88821483; E-mail: zhanghui63hunu@163.com DOI: 10.1016/S1003-6326(14)63491-9
Publisher Copyright:
© 2014 The Nonferrous Metals Society of China.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - Abstract The Al-4.10Cu-1.42Mg-0.57Mn-0.12Zr alloy was compressed to different strains at deformation temperature of 300°C and strain rate of 10 s-1 on Gleeble-1500 system. The dynamic complex microstructures evolutions were investigated by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The true stress-true strain curves exhibited a peak stress at critical strain, after which the flow stresses decreased monotonically, showing a dynamic flow softening. As the strain increased, the dislocation tangled to cell structure and sub-grain structure, which indicated the occurrence of dynamic recovery during deformation. Dynamic precipitations of S (Al2CuMg), θ (Al2Cu) and Al3Zr phase were accelerated and coarsened by deformation. Continuous S phases precipitated in the Al matrix and discontinuous S phases were found to be nucleated near the Al3Zr phase and at the sub-grain boundary. The flow softening mechanism was resulted from the reduction of dislocation density which attributed to dynamic recovery and precipitates coarsening.
AB - Abstract The Al-4.10Cu-1.42Mg-0.57Mn-0.12Zr alloy was compressed to different strains at deformation temperature of 300°C and strain rate of 10 s-1 on Gleeble-1500 system. The dynamic complex microstructures evolutions were investigated by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The true stress-true strain curves exhibited a peak stress at critical strain, after which the flow stresses decreased monotonically, showing a dynamic flow softening. As the strain increased, the dislocation tangled to cell structure and sub-grain structure, which indicated the occurrence of dynamic recovery during deformation. Dynamic precipitations of S (Al2CuMg), θ (Al2Cu) and Al3Zr phase were accelerated and coarsened by deformation. Continuous S phases precipitated in the Al matrix and discontinuous S phases were found to be nucleated near the Al3Zr phase and at the sub-grain boundary. The flow softening mechanism was resulted from the reduction of dislocation density which attributed to dynamic recovery and precipitates coarsening.
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U2 - 10.1016/S1003-6326(14)63491-9
DO - 10.1016/S1003-6326(14)63491-9
M3 - Article
AN - SCOPUS:84927620438
SN - 1003-6326
VL - 24
SP - 3477
EP - 3485
JO - Transactions of Nonferrous Metals Society of China
JF - Transactions of Nonferrous Metals Society of China
IS - 11
M1 - 63491
ER -