Research and Application of Materials Science

Role of heat treatment temperatures on mechanical properties and corrosion resistance properties of Mg-10.16Li-8.14Al-1.46Er alloy

LIUShuhao, QIANXiaoyang, ZOUYun


The microstructure and phase evolution of Mg-10.16Li-8.14Al-1.46Er alloy of as-cast, 250 ℃+12 h, 300 ℃+12 h, and 400 ℃+12 h were studied by optical microscopy, scanning electron microscope, and X-ray diffraction. The mechanical properties of Mg-10.16Li-8.14Al-1.46Er alloy in different states were tested by microhardness tester and tension tester. The corrosion resistance of Mg-10.16Li-8.14Al-1.46Er alloy in different states was measured by electrochemical workstation combined with hydrogen evolution and mass loss tests. The results show that the microstructure of as-cast Mg-10.16Li-8.14Al-1.46Er alloy consists of α, β, AlLi, Al3Er and MgAlLi2 phases. Changes of microstructure are morphology and quantity of α phase, and second phases of MgAlLi2 and AlLi by heat treatments at different temperatures. The best comprehensive tensile properties of Mg-10.16Li-8.14Al-1.46Er at 400 ℃ are attributed to the α phase structure, solution strengthening and second phase strengthening. After heat treatments at different temperatures, the corrosion resistance of Mg-10.16Li-8.14Al-1.46Er was improved compared with as-cast samples. The Mg-10.16Li-8.14Al-1.46Er alloy has the best corrosion resistance at 250 ℃ due to the best homogenization at this temperature.


Ultralight Mg-Li alloy; Microstructure; Heat treatments; Mechanical properties; Corrosion resistance properties

Full Text:



Xu W Q, Birbilis N. A high-specific-strength and

corrosion-resistant magnesium alloy. Nature 2015, 14:


Zhao J, Zhang J. Effect of Y content on microstructure and

mechanical properties of as-cast Mg-8Li-3Al-2Zn alloy with

duplex structure. Mater. Sci. Eng. A 2016, 650: 240–247.

Mineta T, Sato H. Simultaneously improved mechanical

properties and corrosion resistance of Mg-Li-Al alloy

produced by severe plastic deformation. Mater. Sci. Eng. A

, 735: 418–422.

Liu T, Yang Q. Stability of twins in Mg alloys – A short review.

J. Magnes. Alloy. 2020, 8: 66–77.

Pu Z, Yang S. Ultrafine-grained surface layer on Mg-Al-Zn

alloy produced by cryogenic burnishing for enhanced

corrosion resistance. Scr. Mater. 2011, 65: 520–523.

Li R G, Li H R. Achieving exceptionally high strength in binary

Mg-13Gd alloy by strong texture and substantial

precipitates. Scr. Mater. 2021, 193: 142–146.

Pugazhendhi B S, Kar A. Effect of aluminium on

microstructure, mechanical property and texture evolution

of dual phase Mg-8Li alloy in different processing conditions.

Arch. Civ. Mech. Eng. 2018, 18: 1332–1344.

He Y, Peng C. Effects of alloying elements on the

microstructure and corrosion behavior of Mg-Li-Al-Y alloys. J.

Alloys Compd. 2020, 834.

Sun Y H, Wang R C. Corrosion behavior and surface

treatment of superlight Mg-Li alloys. T. Nonferr. Metal. Soc.

, 27: 1455–1475.

Guo J, Chang L L. Effect of Sn and Y addition on the

microstructural evolution and mechanical properties of

hot-extruded Mg-9Li-3Al alloy. Mater. Charact. 2019, 148:


Morishige T, Obata Y. Effect of Al composition on the

corrosion resistance of Mg-14 mass% Li system alloy. Mater.

Trans. 2016, 57: 1853–1856.

Zou Y, Zhang L. Improvement of mechanical behaviors of a

superlight Mg-Li base alloy by duplex phases and fine

precipitates. J. Alloys Compd. 2018, 735: 2625–2633.

Cao D, Wu L. Electrochemical behavior of Mg-Li, Mg-Li-Al

and Mg-Li-Al-Ce in sodium chloride solution. J. Power

Sources 2008, 177: 624–630.

Sun Y, Wang R. Microstructure and corrosion behavior of

as-extruded Mg-xLi-3Al-2Zn-0.2Zr alloys (x = 5, 8, 11 wt.%).

Corros. Sci. 2020, 167.

Sun Y, Wang R. Hot deformation behavior of

Mg-8Li-3Al-2Zn-0.2Zr alloy based on constitutive analysis,

dynamic recrystallization kinetics, and processing map.

Mech. Mater. 2019, 131: 158–168.

Cao F, Zhang J. Mechanical properties and microstructural

evolution in a superlight Mg-6.4Li-3.6Zn-0.37Al-0.36Y alloy

processed by multidirectional forging and rolling. Mater. Sci.

Eng. A 2019, 760: 377–393.

Ji H, Liu W. Influence of Er addition on microstructure and

mechanical properties of as-cast Mg-10Li-5Zn alloy. Mater.

Sci. Eng. A 2019, 739: 395–403.

Wang G W, Song D. Developing improved mechanical

property and corrosion resistance of Mg-9Li Alloy via

solid-solution treatment. Metals 2019, 9.

Li J, An J. Effects of solution heat treatment on the

microstructure and hardness of Mg-5Li-3Al-2Zn-2Cu alloy.

Mater. Sci. Eng. A 2010, 527: 7138–7142.

Pradeep Kumar P, Raj Bharat A. Role of microstructure and

secondary phase on corrosion behavior of heat treated AZ

series magnesium alloys. Mater. Today 2019, 18: 175-181.

Maurya R, Mittal D. Effect of heat-treatment on

microstructure, mechanical and tribological properties of

Mg-Li-Al based alloy. J. Mater. Res. Technol. 2020, 9: 4749–

Wang B, Xu K. Anisotropic corrosion behavior of hot-rolled

Mg-8 wt.%Li alloy. J. Mater. Sci. Technol. 2020, 53: 102–111.

Shi Z, Liu M. Measurement of the corrosion rate of

magnesium alloys using Tafel extrapolation. Corros. Sci.

, 52: 579–588.

Shi Z, Atrens A. An innovative specimen configuration for

the study of Mg corrosion. Corros. Sci. 2011, 53: 226–246.

Wu R, Zhang M. Microstructure, mechanical properties and

aging behavior of Mg-5Li-3Al-2Zn-xAg. Mater. Sci. Eng. A

, 520: 36–39.

Guo X, Wu R. Influences of solid solution parameters on

the microstrucuture and hardness of Mg-9Li-6Al and

Mg-9Li-6Al-2Y. Mater. Des. 2014, 53: 528-533.

Kral M V, Muddle B C. Crystallography of the bcc/hcp

transformation in a Mg-8Li alloy. Mater. Sci. Eng. A 2007,


Song G S, Staiger M. Some new characteristics of the

strengthening phase in β-phase magnesium-lithium alloys

containing aluminum and beryllium. Mater. Sci. Eng. A 2004,

: 371–376.



  • There are currently no refbacks.

Copyright (c) 2022 Shuhao LIU, Xiaoyang QIAN, Yun ZOU

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.