TY - JOUR
T1 - The microstructures and mechanical properties of cast Mg-Zn-Al-RE alloys
AU - Xiao, Wenlong
AU - Jia, Shusheng
AU - Wang, Lidong
AU - Wu, Yaoming
AU - Wang, Limin
PY - 2009/7/8
Y1 - 2009/7/8
N2 - The microstructures and mechanical properties of cast Mg-Zn-Al-RE alloys with 4 wt.% RE and variable Zn and Al contents were investigated. The results show that the alloys mainly consist of α-Mg, Al2REZn2, Al4RE and τ-Mg32(Al,Zn)49 phases, and a little amount of the β-Mg17Al12 phase will also be formed with certain Zn and Al contents. When increasing the Zn or Al content, the distribution of the Al2REZn2 and Al4RE phases will be changed from cluster to dispersed, and the content of τ-Mg32(Al,Zn)49 phase increased gradually. The distribution of the Al2REZn2 and Al4RE phases, and the content of β- or τ-phase are critical to the mechanical properties of Mg-Zn-Al-RE alloys. The Mg-6Zn-5Al-4RE alloy with cluster Al2REZn2 phase and low content of β-phase, exhibits the optimal mechanical properties, and the ultimate tensile strength, yield strength and elongation are 242 MPa, 140 MPa and 6.4% at room temperature, respectively.
AB - The microstructures and mechanical properties of cast Mg-Zn-Al-RE alloys with 4 wt.% RE and variable Zn and Al contents were investigated. The results show that the alloys mainly consist of α-Mg, Al2REZn2, Al4RE and τ-Mg32(Al,Zn)49 phases, and a little amount of the β-Mg17Al12 phase will also be formed with certain Zn and Al contents. When increasing the Zn or Al content, the distribution of the Al2REZn2 and Al4RE phases will be changed from cluster to dispersed, and the content of τ-Mg32(Al,Zn)49 phase increased gradually. The distribution of the Al2REZn2 and Al4RE phases, and the content of β- or τ-phase are critical to the mechanical properties of Mg-Zn-Al-RE alloys. The Mg-6Zn-5Al-4RE alloy with cluster Al2REZn2 phase and low content of β-phase, exhibits the optimal mechanical properties, and the ultimate tensile strength, yield strength and elongation are 242 MPa, 140 MPa and 6.4% at room temperature, respectively.
KW - Mechanical properties
KW - Mg-Zn-Al-RE alloys
KW - Microstructures
KW - Phase transformation
KW - Strengthening
UR - https://www.scopus.com/pages/publications/67349117749
U2 - 10.1016/j.jallcom.2009.02.087
DO - 10.1016/j.jallcom.2009.02.087
M3 - 快报
AN - SCOPUS:67349117749
SN - 0925-8388
VL - 480
SP - L33-L36
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 2
ER -