TY - JOUR

T1 - Fabrication of a high strength Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy by thermomechanical treatments

AU - Yu, Zijian

AU - Huang, Yuanding

AU - Qiu, Xin

AU - Wang, Guanfu

AU - Meng, Fanzhi

AU - Hort, Norbert

AU - Meng, Jian

PY - 2015/1/12

Y1 - 2015/1/12

N2 - A high strength Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy has been successfully fabricated via hot extrusion, cold rolling and ageing treatment. The alloy exhibits an average 0.2% proof stress (YS) of 481.6±19.9MPa, an average ultimate tensile strength (UTS) of 517.4±27.5MPa and an average elongation to failure of 2.0±0.4% at room temperature. The best mechanical property obtained in the present study has a YS of 502.0MPa, an UTS of 546.8MPa and an elongation to failure of 2.6%. The high strength of this alloy is attributed to the fine grains, stacking faults (SFs), long period stacking ordered (LPSO) phase, and precipitates of Mg5RE phase at grain boundaries and of β' phase inside the grains. Cold rolling improves the mechanical properties and enhances the ageing hardening response, but decreases the ductility. Two texture components are found simultaneously in the deformed alloy. One is the typical Mg-RE texture and another one is the unusual prismatic texture.

AB - A high strength Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy has been successfully fabricated via hot extrusion, cold rolling and ageing treatment. The alloy exhibits an average 0.2% proof stress (YS) of 481.6±19.9MPa, an average ultimate tensile strength (UTS) of 517.4±27.5MPa and an average elongation to failure of 2.0±0.4% at room temperature. The best mechanical property obtained in the present study has a YS of 502.0MPa, an UTS of 546.8MPa and an elongation to failure of 2.6%. The high strength of this alloy is attributed to the fine grains, stacking faults (SFs), long period stacking ordered (LPSO) phase, and precipitates of Mg5RE phase at grain boundaries and of β' phase inside the grains. Cold rolling improves the mechanical properties and enhances the ageing hardening response, but decreases the ductility. Two texture components are found simultaneously in the deformed alloy. One is the typical Mg-RE texture and another one is the unusual prismatic texture.

KW - High strength

KW - Magnesium alloy

KW - Mechanical property

KW - Microstructure

KW - Thermomechanical treatment

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=84911901069&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2014.10.077

DO - 10.1016/j.msea.2014.10.077

M3 - Journal articles

AN - SCOPUS:84911901069

VL - 622

SP - 121

EP - 130

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

SN - 0921-5093

ER -