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Development of High‐Performance Mg Alloy via Introducing Profuse Long Period Stacking Ordered Phase and Stacking Faults
Author(s) -
Jiao Yufeng,
Zhang Jinghuai,
Jing Yongbin,
Xu Chi,
Liu Shujuan,
Zhang Li,
Xu Longjiang,
Zhang Milin,
Wu Ruizhi
Publication year - 2015
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201400369
Subject(s) - materials science , stacking , ultimate tensile strength , alloy , extrusion , volume fraction , phase (matter) , casting , metallurgy , magnesium alloy , composite material , chemistry , physics , organic chemistry , nuclear magnetic resonance
Due to low density and other features, magnesium (Mg) alloys are becoming one of key engineering structural materials for aerospace and automotive industries. In the meantime, conventional Mg alloys are limited because of their low mechanical properties, especially at high temperatures. In this study, a new Mg–12Ymm–4Zn (Ymm = Y‐rich misch metal, wt%) extruded alloy was prepared by water‐cooled mold casting and hot extrusion, and its ultimate tensile strength (UTS) and tensile yield strength (TYS) could reach 314 and 231 MPa at 300 °C, which were slightly lower than those at room temperature (338 and 278 MPa). To date, there is rare report on such high strength for Mg alloys at 300 °C, and it has been confirmed that introducing a large volume fraction of long‐period stacking ordered (LPSO) phase in combination with nano‐spaced stacking faults (SFs) is an effective pathway to develop deformed Mg alloys with high strength at elevated temperatures.