Microstructure Evolution of Mg-10Gd-2Y-0.5Zn-0.3Zr Alloy during Isothermal Forging Process

De Bin Shan; X.Z. Han; Wen Chen Xu

doi:10.4028/www.scientific.net/MSF.783-786.485

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Microstructure Evolution of Mg-10Gd-2Y-0.5Zn-0.3Zr Alloy during Isothermal Forging Process
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HomeMaterials Science ForumMaterials Science Forum Vols. 783-786Microstructure Evolution of Mg-10Gd-2Y-0.5Zn-0.3Zr...

Microstructure Evolution of Mg-10Gd-2Y-0.5Zn-0.3Zr Alloy during Isothermal Forging Process

Abstract:

The isothermal forging process of a bracket and its microstructure evolution of Mg-10Gd-2Y-0.5Zn-0.3Zr alloy have been investigated in the present study. The results show that the bracket with thin-web and high-rib is well formed through modifying corners and adding an active damping block into male die. Amounts of lamellae and particles distribute uniformly on the matrix after the isothermal forging process and ageing process. The isothermal forging process has an obvious effect on the precipitation behaviour of secondary phases, while it did not change the grain size greatly. With the increase of ageing time, more secondary phases precipitate from α-Mg matrix until 60h. The optimal ultimate tensile strength and elongation of the peak-aged alloy are 382MPa and 4.03%, respectively. The combined effects of LPO and β′ phases contribute to the high strength of the peak-aged alloy.

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Periodical:

Materials Science Forum (Volumes 783-786)

Pages:

485-490

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.783-786.485

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Online since:

May 2014

Authors:

De Bin Shan, X.Z. Han, Wen Chen Xu

Keywords:

Isothermal Forging Process, Mechanical Property, Mg-10Gd-2Y-0.5Zn-0.3Zr, Secondary Phases

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