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Effect of ageing treatment on the microstructure, texture and mechanical properties of extruded Mg–8.2Gd–3.8Y–1Zn–0.4Zr (wt%) alloy

Authors :
Chi, Y.Q.
Zheng, M.Y.
Xu, C.
Du, Y.Z.
Qiao, X.G.
Wu, K.
Liu, X.D.
Wang, G.J.
Lv, X.Y.
Source :
Materials Science & Engineering: A. Mar2013, Vol. 565, p112-117. 6p.
Publication Year :
2013

Abstract

Abstract: Extruded Mg–8.2Gd–3.8Y–1Zn–0.4Zr (wt%) alloy was subjected to ageing treatment at 200°C. The microstructures, textures and mechanical properties of the as-extruded and peak-aged alloys were investigated. Recrystallization occurred during ageing treatment. A large number of β′ phases were observed in the peak-aged alloy, accompanied with the decrease of the volume fraction of LPSO phases. A basal fiber texture and an unusual texture component with basal planes perpendicular to the extrusion direction were found in the as-extruded alloy, and the basal fiber texture was strengthened after ageing treatment. The peak-aged alloy exhibited a tensile yield strength (TYS), an ultimate tensile strength (UTS) and an elongation to failure of 395MPa, 470MPa and 8%, respectively, at ambient temperature, and 271MPa, 311MPa and 19%, respectively, at 300°C. The superior strength of the peak-aged alloy was mainly attributed to the precipitation of fine β′ phases, the remaining LPSO phases and the texture modification. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
09215093
Volume :
565
Database :
Academic Search Index
Journal :
Materials Science & Engineering: A
Publication Type :
Academic Journal
Accession number :
85615057
Full Text :
https://doi.org/10.1016/j.msea.2012.11.125