Microstructural evolution and mechanical properties of Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr alloy prepared via pre-ageing and hot extrusion
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Microstructural evolution and mechanical properties of Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr alloy prepared via pre-ageing and hot extrusion. / Yu, Zijian; Huang, Yuanding; Mendis, Chamini Lakshi et al.
In: Materials Science and Engineering A, Vol. 624, 29.01.2015, p. 23-31.Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Microstructural evolution and mechanical properties of Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr alloy prepared via pre-ageing and hot extrusion
AU - Yu, Zijian
AU - Huang, Yuanding
AU - Mendis, Chamini Lakshi
AU - Hort, Norbert
AU - Meng, Jian
PY - 2015/1/29
Y1 - 2015/1/29
N2 - The Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy was pre-aged prior to hot extrusion. Pre-ageing treatment introduced uniform distribution of plate-like Mg5RE precipitates, which transformed into nano-scale globular Mg5RE particles by split and spheroidization during hot extrusion. These globular Mg5RE particles contributed to continuous dynamic recrystallization by promoting the evolution of low misorientation sub-grain boundaries to high misorientation grain boundaries and caused grain refinement through grain boundary pinning. The improved mechanical properties were ascribed to the grain refinement, globular Mg5RE and LPSO precipitates. The ratio of compressive to tensile yield strength is 1.2. The yield strength asymmetry was attributed to the deformation asymmetry of LPSO phase and non-isotropic deformation behaviors of Mg matrix in tension and compression.
AB - The Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy was pre-aged prior to hot extrusion. Pre-ageing treatment introduced uniform distribution of plate-like Mg5RE precipitates, which transformed into nano-scale globular Mg5RE particles by split and spheroidization during hot extrusion. These globular Mg5RE particles contributed to continuous dynamic recrystallization by promoting the evolution of low misorientation sub-grain boundaries to high misorientation grain boundaries and caused grain refinement through grain boundary pinning. The improved mechanical properties were ascribed to the grain refinement, globular Mg5RE and LPSO precipitates. The ratio of compressive to tensile yield strength is 1.2. The yield strength asymmetry was attributed to the deformation asymmetry of LPSO phase and non-isotropic deformation behaviors of Mg matrix in tension and compression.
KW - Deformation
KW - Mechanical properties
KW - Pre-ageing
KW - Precipitates
KW - Recrystallization
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84918798445&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2014.11.061
DO - 10.1016/j.msea.2014.11.061
M3 - Journal articles
AN - SCOPUS:84918798445
VL - 624
SP - 23
EP - 31
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
SN - 0921-5093
ER -