Microstructure and Properties of As-cast Mg-8Zn-4Al-0.5Cu-0.5Mn-xLi Alloys with High Modulus

doi:10.11901/1005.3093.2023.130

Chinese Journal of Materials Research

2024, Vol. 38

Issue (3): 187-196 DOI: 10.11901/1005.3093.2023.130

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Microstructure and Properties of As-cast Mg-8Zn-4Al-0.5Cu-0.5Mn-xLi Alloys with High Modulus

LIU Chenye¹^,², LUO Tianjiao¹(

), LI Yingju¹, FENG Xiaohui¹, HUANG Qiuyan¹, ZHENG Ce¹, ZHU Cheng¹, YANG Yuansheng¹

^1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^2.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

Cite this article:

LIU Chenye, LUO Tianjiao, LI Yingju, FENG Xiaohui, HUANG Qiuyan, ZHENG Ce, ZHU Cheng, YANG Yuansheng. Microstructure and Properties of As-cast Mg-8Zn-4Al-0.5Cu-0.5Mn-xLi Alloys with High Modulus. Chinese Journal of Materials Research, 2024, 38(3): 187-196.

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Abstract

Aiming at the demand of high stiffness light metal structure materials, high specific modulus Mg-alloys Mg-8Zn-4Al-0.5Cu-0.5Mn-xLi (x = 0, 3, 5, 7) (%, mass fraction) (namely ZA84-xLi) were designed and prepared, as well as and then optimized. When the Li content in the alloy is 3.14% and 5.37%, the alloy matrix is composed mainly of single-phase α-Mg, while the skeletal-like Mg₃₂(Al, Zn)₄₉ phase is precipitated near grain boundaries, and there is a granular-like Mg₅Al₂Zn₂ phase and Al₂Mn phase inside the grain; when the Li content is 7.57%, the alloy matrix is mainly a dual-phase structure α-Mg + β-Li. After the addition of Li, many eutectic structures are formed near the grain boundaries, which are composed of α-Mg phase and lamellar-like AlLi phase, and with the increase of Li content, the amount of lamellar-like AlLi phase also gradually increases. The yield strength of the alloy increases gradually with the increase of Li content, while the tensile strength remains basically unchanged. The elastic modulus of the alloy increases first and then decreases with the increase of Li content. For the as-cast ZA84-5Li, the elastic modulus can reach 51.89 GPa, which is 7 GPa higher than that of pure Mg, while the mechanical properties of the alloy basically keeps unchanged. Namely, the yield strength, tensile strength and density is 141 MPa, 189 MPa and 1.71 g/cm³ respectively for the cast alloy.

Key words: metallic materials magnesium alloy second phases reinforcement microstructure elastic modulus

Received: 15 February 2023

ZTFLH:

TG146.22

Fund: National Key R&D Program of China(2021YFB3701100)

Corresponding Authors: LUO Tianjiao, Tel:(024)23971109,13514252330, E-mail: tjluo@imr.ac.cn

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	LIU Chenye
	LUO Tianjiao
	LI Yingju
	FENG Xiaohui
	HUANG Qiuyan
	ZHENG Ce
	ZHU Cheng
	YANG Yuansheng

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https://www.cjmr.org/EN/10.11901/1005.3093.2023.130 OR https://www.cjmr.org/EN/Y2024/V38/I3/187

Table 1 Chemical composition of ZA84-xLi alloys (mass fraction, %)

Fig.1 XRD patterns of ZA84-xLi alloys

Fig.2 Microstructure of ZA84-xLi alloys (a) x = 0; (b) x = 3; (c) x = 5; (d) x = 7

Fig.3 Average grain size of ZA84-xLi alloys

Fig.4 SEM images of the ZA84-xLi alloys (a) x = 0; (b) x = 3; (c) x = 5; (d) x = 7

Fig.5 Content of the second phase in ZA84-xLi alloys

Fig.6 EDS analyses of the ZA84-5Li alloy (a) SEM image; (b) A; (c) B; (d) C

Fig.7 SIMS of ZA84-5Li alloy (a) Li; (b) Mg; (c) Al; (d) Zn; (e) Cu; (f) Mn

Fig.8 TEM of ZA84-3Li alloy (a) Bright field phase; (b) Mg; (c) Zn; (d) Al; (e) Cu; (f) Mn

Fig.9 Density of ZA84-xLi alloys

Fig.10 Hardness of ZA84-xLi alloys

Fig11 Tensile property of ZA84-xLi alloys

Fig.12 Metallographic photographs of tensile fracture longitude sections of the ZA84-xLi alloys (a) x = 0; (b) x = 3; (c) x = 5; (d) x = 7

Fig.13 SEM images of the stretched fracture morphology of the ZA84-xLi alloys (a) x = 0; (b) x = 3; (c) x = 5; (d) x = 7

Fig.14 Elasticity modulus of ZA84-xLi alloys

Table 2 Matrix and grain boundary second phase elastic modulus of ZA84-xLi alloys

Fig.15 Nanoindentation analysis of the ZA84-xLi alloys (a) load-displacement curve; (b) elastic modulus of α-Mg matrix

1	Wu R Z, Yan Y, Wang G, et al. Recent progress in magnesium-lithium alloys [J]. Int. Mater. Rev., 2014, 60(2): 65 doi: 10.1179/1743280414Y.0000000044
2	Ding H B, Liu Q, Zhou H T, et al. Effect of thermal-mechanical processing on microstructure and mechanical properties of duplex-phase Mg-8Li-3Al-0.4Y alloy [J]. T. Nonferr. Metal. Soc., 2017, 27(12): 2587 doi: 10.1016/S1003-6326(17)60286-3
3	Ji Q, Wang Y, Wu R Z, et al. High specific strength Mg-Li-Zn-Er alloy processed by multi deformation processes [J]. Mater. Charact., 2020, 160: 110
4	Zhang X S, Chen Y J, Hu J L. Recent advances in the development of aerospace materials [J]. Prog. Aerosp. Sci., 2018, 97: 22 doi: 10.1016/j.paerosci.2018.01.001
5	Frankel G S. Magnesium alloys: Ready for the road [J]. Nat. Mater., 2015, 14(12): 1189 doi: 10.1038/nmat4453 pmid: 26480230
6	Chen X Y, Zhang Y, Cong M Q, et al. Effect of Sn content on microstructure and tensile properties of as-cast and as-extruded Mg-8Li-3Al-(1, 2, 3)Sn alloys [J]. T. Nonferr. Metal. Soc., 2020, 30(8): 2079 doi: 10.1016/S1003-6326(20)65362-6
7	Villuendas A, Jorba J, Roca A. The role of precipitates in the behavior of Young's modulus in aluminum alloys [J]. Metall. Mater. Trans. A, 2014, 45(9): 3857 doi: 10.1007/s11661-014-2328-8
8	Huang W, Li D. Effects of isothermal heat-treatment at 300^oC on microstructure and mechanical properties of AZ91D die cast magnesium alloy [J]. Trans. Mater. Heat Treat., 2006, (2): 37
	黄巍, 李荻. 300℃等温处理时间对AZ91D压铸镁合金组织和性能的影响 [J]. 材料热处理学报, 2006, (2): 37
9	Wang C Y, Wu K, Wang J J, et al. A study of microstructures and properties of extruded MB15 magnesium alloy [J]. J. Heilongjiang Inst. Techn., 2013, 27(4): 68
	王春艳, 吴昆, 王佳杰等. 挤压态MB15镁合金的显微组织与力学性能研究 [J]. 黑龙江工程学院学报(自然科学版), 2013, 27(4): 68
10	Xi Y L, Zhang W X, Chai D L, et al. Fabricating process and mechanical properties of SiC particulates-reinforced magnesium matrix composites by powder metallurgy [J]. Hot Work. Techn., 2001, 5: 24
	郗雨林, 张文兴, 柴东琅等. 粉末冶金法制备SiC颗粒增强镁基复合材料工艺及性能的研究 [J]. 热加工工艺, 2001, 5: 24
11	Li J G. Study on the interfacial and hybrid behaviors of magnesium matrix composites reinforced with magnesium borate whisker [D]. Shanghai: Shanghai Jiao Tong University, 2013
	李建国. 硼酸镁晶须增强镁基复合材料界面及混杂行为研究 [D]. 上海: 上海交通大学, 2013
12	Zhang X M, Hu J L, Ye L Y, et al. Effects of Si addition on microstructure and mechanical properties of Mg-8Gd-4Y-Nd-Zr alloy [J]. Mater. Design, 2013, 43: 74 doi: 10.1016/j.matdes.2012.06.022
13	Tu T, Chen X H, Zhao C Y, et al. A simultaneous increase of elastic modulus and ductility by Al and Li additions in Mg-Gd-Zn-Zr-Ag alloy [J]. Mater. Sci. Eng. A, 2020, 771: 138576 doi: 10.1016/j.msea.2019.138576
14	Zhao D, Chen X H, Yuan Y, et al. Development of a novel Mg-Y-Zn-Al-Li alloy with high elastic modulus and damping capacity [J]. Mater. Sci. Eng. A, 2020, 790: 139744 doi: 10.1016/j.msea.2020.139744
15	Shi H L, Xu C, Hu X S, et al. Improving the Young's modulus of Mg via alloying and compositing-A short review [J]. J. Magnesium Alloy., 2022, 10(8): 2009 doi: 10.1016/j.jma.2022.07.011
16	Yang M B, Zhu Y, Pan F S, et al. Effects of Minor Sr on As-Cast Microstructure and Mechanical Properties of ZA84 Magnesium Alloy [J]. T. Nonferr. Metal. Soc., 2010, 20: s306 doi: 10.1016/S1003-6326(10)60488-8
17	Yuan G Y, Kato H, Amiya K, et al. Excellent creep properties of Mg-Zn-Cu-Gd-based alloy strengthened by quasicrystals and Laves phases [J]. J. Mater. Res., 2005, 20(5): 1278 doi: 10.1557/JMR.2005.0156
18	Liu Y, Yuan G Y, Lu C, et al. Microstructure and mechanical properties of Mg-Zn-Gd-based alloys strengthened with quasicrystal and Laves phase [J]. T. Nonferr. Metal. Soc., 2007, 17: s353
19	Kaya A A, Uzan P, Eliezer D, et al. Electron microscopical investigation of as cast AZ91D alloy [J]. Mater. Sci. Techn., 2000, 16(9): 1001 doi: 10.1179/026708300101508955
20	Kham S A, Miyashita Y, Mutoh Y, et al. Influence of Mn content on mechanical properties and fatigue behavior of extruded Mg alloys [J]. Mater. Sci. Eng. A, 2006, 420: 315 doi: 10.1016/j.msea.2006.01.091
21	Oliver W C, Pharr G M. Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology [J]. J. Mater. Res., 2004, 19: 3 doi: 10.1557/jmr.2004.19.1.3
22	Rahulan N, Gopalan S, Kumaran S. Mechanical behavior of Mg-Li-Al alloys [J]. Mater. Today: Proc., 2018, 5: 17935
23	Peng X, Sun J W, Liu H J, et al. Microstructure and corrosion behavior of as-homogenized and as-extruded Mg-xLi-3Al-2Zn-0.5Y alloys (x = 4, 8, 12) [J]. T. Nonferr. Metal. Soc., 2022, 32: 134 doi: 10.1016/S1003-6326(21)65783-7
24	Sun Y H, Wang R C, Peng C Q, et al. Effects of Sn and Y on the microstructure, texture, and mechanical properties of as-extruded Mg-5Li-3Al-2Zn alloy [J]. Mater. Sci. Eng. A, 2018, 733: 429 doi: 10.1016/j.msea.2018.05.030
25	Zhang H J. Microalloying effects of rare element of Nd, Y on the Mg-6Zn-1Mn magnesium alloy [D]. Chongqing: Chongqing University, 2015
	张红菊. 稀土Nd、Y对Mg-6Zn-1Mn镁合金微合金化效应的研究 [D]. 重庆: 重庆大学, 2015
26	Peng X, Liu W C, Wu G H. Effects of Li content on microstructure and mechanical properties of as-cast Mg-xLi-3Al-2Zn-0.5Y alloys [J]. T. Nonferr. Metal. Soc., 2022, 32: 838 doi: 10.1016/S1003-6326(22)65837-0
27	Hu W Y, Le Q Z, Zhang Z Q, et al. Effect of lithium on microstructures and mechanical properties of GW82K magnesium alloy [J]. Foundry, 2017, 66(5): 445
	胡文义, 乐启炽, 张志强等. Li对GW82K镁合金组织与性能的影响 [J]. 铸造, 2017, 66(5): 445
28	Ma T, Xu C J, Feng G W, et al. Effect of Li content on microstructure and properties of Mg-Li alloy [J]. Foundry Technology, 2016, 37(5): 863
	马涛, 徐春杰, 冯港雯等. Li含量对Mg-Li合金组织与性能的影响 [J]. 铸造技术, 2016, 37(5): 863
29	Dorin T, Vahid A, Lamb J. Fundamentals of Aluminium Metallurgy: Chapter11, Aluminium Lithium Alloys [M]. Woodhead publishing series in metals and surface engineering, 2018: 378
30	Han J, Su X M, Jin Z H, et al. Basal-plane stacking-fault energies of Mg: A first-principles study of Li- and Al-alloying effects [J]. Scripta Mater., 2011, 64(8): 693 doi: 10.1016/j.scriptamat.2010.11.034
31	Xu Y L, Wang L, Huang M, et al. The Effect of Solid Solute and Precipitate Phase on Young's Modulus of Binary Mg-RE Alloys [J]. Adv. Eng. Mater., 2018, 20(10): 1800271 doi: 10.1002/adem.v20.10

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