Microstructure and mechanical properties of large-scale Mg-Gd-Y-Zn-Mn alloys prepared through semi-continuous casting
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In: Journal of Materials Science and Technology, Vol. 52, 01.09.2020, p. 72-82.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Microstructure and mechanical properties of large-scale Mg-Gd-Y-Zn-Mn alloys prepared through semi-continuous casting
AU - Wang, Kui
AU - Wang, Jingfeng
AU - Dou, Xiaoxu
AU - Huang, Yuanding
AU - Hort, Norbert
AU - Gavras, Sarkis
AU - Liu, Shijie
AU - Cai, Yanwu
AU - Wang, Jinxing
AU - Pan, Fusheng
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Large-scale Mg-8Gd-4Y-1Zn-Mn (wt.%) alloy ingot with a diameter of 315 mm and a length of 2410 mm was prepared through semi-continuous casting. Chemical composition, microstructure and mechanical properties at different locations of the samples with as-cast, T4 and T6 heat-treated states, respectively, were investigated. No obvious macro segregation has been detected in the high-quality alloy ingot. The main eutectic structures at all different locations are composed of α-Mg, Mg3RE-type, Mg5RE-type and LPSO phases. At the edge of ingot, the unusual casting twins including {101-2} extension twins and {101-1} compression twins were observed due to the intensive internal stress. In T4 heat-treated alloy, the micro segregation was eliminated. The remained phases were α-Mg and LPSO phase. Combined with the remarkable age-hardening response, T6 samples exhibits improved mechanical properties at ambient temperature, which derives from the dense prismatic β' precipitates and profuse basal γ' precipitates.
AB - Large-scale Mg-8Gd-4Y-1Zn-Mn (wt.%) alloy ingot with a diameter of 315 mm and a length of 2410 mm was prepared through semi-continuous casting. Chemical composition, microstructure and mechanical properties at different locations of the samples with as-cast, T4 and T6 heat-treated states, respectively, were investigated. No obvious macro segregation has been detected in the high-quality alloy ingot. The main eutectic structures at all different locations are composed of α-Mg, Mg3RE-type, Mg5RE-type and LPSO phases. At the edge of ingot, the unusual casting twins including {101-2} extension twins and {101-1} compression twins were observed due to the intensive internal stress. In T4 heat-treated alloy, the micro segregation was eliminated. The remained phases were α-Mg and LPSO phase. Combined with the remarkable age-hardening response, T6 samples exhibits improved mechanical properties at ambient temperature, which derives from the dense prismatic β' precipitates and profuse basal γ' precipitates.
KW - Mechanical properties
KW - Mg-Gd-Y-Zn-Mn alloy
KW - Microstructure
KW - Semi-continuous casting
KW - Thermal treatment
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85083874748&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/94895b53-ee31-3dcd-bb14-b40a4cb4ef60/
U2 - 10.1016/j.jmst.2020.04.013
DO - 10.1016/j.jmst.2020.04.013
M3 - Journal articles
AN - SCOPUS:85083874748
VL - 52
SP - 72
EP - 82
JO - Journal of Materials Science and Technology
JF - Journal of Materials Science and Technology
SN - 1005-0302
ER -