Effect of Quenching Treatment on Microstructure and Hardness of Mg-9Li-4Al-1Zn-0.5Y Alloy

Chao Duan; Jin Liang Huang

doi:10.4028/www.scientific.net/KEM.748.245

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 748Effect of Quenching Treatment on Microstructure...

Effect of Quenching Treatment on Microstructure and Hardness of Mg-9Li-4Al-1Zn-0.5Y Alloy

Abstract:

This paper studies the effect of different solution temperature and quenching medium on Microstructure and hardness of Mg-9Li-4Al-1Zn-0.5Y alloy by means of optical microscope (OM), X-ray diffraction (XRD) and hardness testing. The results show that in the solution process, the higher of the solution temperature is, more of the second phase dissolved in β phase. In the quenching process, the higher of the cooling rate is, more of the second phase dissolved in the β phase precipitates from the super-saturation β matrix, which can greatly weaken the solution strengthening effect. The hardness of the investigated alloy reaches its highest value with solution treatment at 648K and water-quenched treatment, increased from 58HB to 108HB.

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Periodical:

Key Engineering Materials (Volume 748)

Pages:

245-249

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.748.245

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Online since:

August 2017

Authors:

Chao Duan, Jin Liang Huang*

Keywords:

Cooling Rate, Hardness, Mg-Li Alloy, Microstructure, Quenching Temperature

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