TY - JOUR
T1 - Effect of Al addition on microstructure and mechanical properties of Mg−Zn−Sn−Mn alloy
AU - HOU, Cai hong
AU - YE, Zhi song
AU - QI, Fu gang
AU - WANG, Qing
AU - LI, Lian hui
AU - OUYANG, Xiao ping
AU - ZHAO, Nie
N1 - Publisher Copyright:
© 2021 The Nonferrous Metals Society of China
PY - 2021/7
Y1 - 2021/7
N2 - The microstructure and properties of the as-cast, as-homogenized and as-extruded Mg−6Zn−4Sn−1Mn (ZTM641) alloy with various Al contents (0, 0.5, 1, 2, 3 and 4 wt.%) were investigated by OM, XRD, DSC, SEM, TEM and uniaxial tensile tests. The results show that when the Al content is not higher than 0.5%, the alloys are mainly composed of α-Mg, Mg2Sn, Al8Mn5 and Mg7Zn3 phases. When the Al content is higher than 0.5%, the alloys mainly consist of α-Mg, Mg2Sn, MgZn, Mg32(Al,Zn)49, Al2Mg5Zn2, Al11Mn4 and Al8Mn5 phases. A small amount of Al (≤1%) can increase the proportion of fine dynamic recrystallized (DRXed) grains during hot-extrusion process. The room- temperature tensile test results show that the ZTM641−1Al alloy has the best comprehensive mechanical properties, in which the ultimate tensile strength is 332 MPa, yield strength is 221 MPa and the elongation is 15%. Elevated- temperature tensile test results at 150 and 200 °C show that ZTM641−2Al alloy has the best comprehensive mechanical properties.
AB - The microstructure and properties of the as-cast, as-homogenized and as-extruded Mg−6Zn−4Sn−1Mn (ZTM641) alloy with various Al contents (0, 0.5, 1, 2, 3 and 4 wt.%) were investigated by OM, XRD, DSC, SEM, TEM and uniaxial tensile tests. The results show that when the Al content is not higher than 0.5%, the alloys are mainly composed of α-Mg, Mg2Sn, Al8Mn5 and Mg7Zn3 phases. When the Al content is higher than 0.5%, the alloys mainly consist of α-Mg, Mg2Sn, MgZn, Mg32(Al,Zn)49, Al2Mg5Zn2, Al11Mn4 and Al8Mn5 phases. A small amount of Al (≤1%) can increase the proportion of fine dynamic recrystallized (DRXed) grains during hot-extrusion process. The room- temperature tensile test results show that the ZTM641−1Al alloy has the best comprehensive mechanical properties, in which the ultimate tensile strength is 332 MPa, yield strength is 221 MPa and the elongation is 15%. Elevated- temperature tensile test results at 150 and 200 °C show that ZTM641−2Al alloy has the best comprehensive mechanical properties.
KW - Al
KW - Mg−Zn−Sn−Mn alloy
KW - dynamic recrystallization
KW - mechanical properties
KW - microstructure
KW - nucleation
UR - https://www.scopus.com/pages/publications/85111862676
U2 - 10.1016/S1003-6326(21)65629-7
DO - 10.1016/S1003-6326(21)65629-7
M3 - 文章
AN - SCOPUS:85111862676
SN - 1003-6326
VL - 31
SP - 1951
EP - 1968
JO - Transactions of Nonferrous Metals Society of China (English Edition)
JF - Transactions of Nonferrous Metals Society of China (English Edition)
IS - 7
ER -