TY - GEN
T1 - Microstructure and creep properties of selected gravity casting magnesium alloys
AU - Tomasz, Rzychoń
N1 - Publisher Copyright:
© 2016 Trans Tech Publications.
PY - 2016
Y1 - 2016
N2 - In this paper microstructure and creep properties of Mg-Al-Ca-Sr, Mg-Zn-RE-Zr and Mg-Sn-Si gravity casting magnesium alloys are presented. The microstructure was characterized using light microscopy, scanning and transmission electron microscopy. Phase identification was made by SAED and XRD analysis. Creep tests were carried out in the temperature range from 180°C to 200°C at applied stress of 60 MPa. Microstructure of Mg-Al-Ca-Sr alloys composed of α-Mg grains and C36, C15 and C14 intermetallic compounds in the interdendritic regions. In case of Mg-Zn-RE-Zr alloys the dominant intermetallic compound is (Mg, Zn)12RE phase also located in the interdendritic regions. Microstructure of Mg-Sn-Si alloys after T6 heat treatment consists of plate-like precipitates of Mg2Sn phase, primary crystals of Mg2Si phase and globular Mg2Si phase. Among the alloys in this study, the low-cost Mg-5Al-3Ca-0.7Sr alloy has the best creep resistance. The other alloys, excluding the Mg-5Si-7Sn alloy, are characterized by a poorer creep resistance in compared to Mg-5Al-3Ca-0.7Sr alloy, however their creep resistance is better if compared to typical Mg-Al alloys. Creep resistance of Mg-5Si-7Sn alloy is very low.
AB - In this paper microstructure and creep properties of Mg-Al-Ca-Sr, Mg-Zn-RE-Zr and Mg-Sn-Si gravity casting magnesium alloys are presented. The microstructure was characterized using light microscopy, scanning and transmission electron microscopy. Phase identification was made by SAED and XRD analysis. Creep tests were carried out in the temperature range from 180°C to 200°C at applied stress of 60 MPa. Microstructure of Mg-Al-Ca-Sr alloys composed of α-Mg grains and C36, C15 and C14 intermetallic compounds in the interdendritic regions. In case of Mg-Zn-RE-Zr alloys the dominant intermetallic compound is (Mg, Zn)12RE phase also located in the interdendritic regions. Microstructure of Mg-Sn-Si alloys after T6 heat treatment consists of plate-like precipitates of Mg2Sn phase, primary crystals of Mg2Si phase and globular Mg2Si phase. Among the alloys in this study, the low-cost Mg-5Al-3Ca-0.7Sr alloy has the best creep resistance. The other alloys, excluding the Mg-5Si-7Sn alloy, are characterized by a poorer creep resistance in compared to Mg-5Al-3Ca-0.7Sr alloy, however their creep resistance is better if compared to typical Mg-Al alloys. Creep resistance of Mg-5Si-7Sn alloy is very low.
KW - Creep properties
KW - Mg-Al-Ca-Sr alloys
KW - Mg-Sn-Si alloys
KW - Mg-Zn-RE-Zr alloys
UR - https://www.scopus.com/pages/publications/84960416849
U2 - 10.4028/www.scientific.net/KEM.682.372
DO - 10.4028/www.scientific.net/KEM.682.372
M3 - Conference contribution
AN - SCOPUS:84960416849
SN - 9783038357339
T3 - Key Engineering Materials
SP - 372
EP - 379
BT - Engineering and Technology on Non-Ferrous Metals
A2 - Perek-Nowak, Małgorzata
A2 - Boczkal, Grzegorz
PB - Trans Tech Publications Ltd.
T2 - 2nd International Conference on Non-Ferrous Metals, ICNFM 2015
Y2 - 22 June 2015 through 24 June 2015
ER -