Research and Application of Materials Science

Influence of Mn and Mg contents on mechanical properties of the die-casting aluminum alloy HL-111

HEYanyang, XUGang, YUXiguang


In this study, four groups of thin plate samples with a wall thickness of 2.2mm, 2.5mm, 2.7mm, and 3.0mm are prepared by ultra-high vacuum die casting. The effects of Mn, Mg, and Mn/Mg ratio on the microstructure and mechanical properties of samples with different wall thicknesses are obtained by different test and analysis methods. The results show that as the content of Mn is 0.4% ~ 0.65%, the content of Mg is 0.17% ~ 0.5%, and the Mn / Mg ratio reaches 1.69 ~ 1.90, the tensile strength, yield strength, and elongation of HL-111 alloy with a wall thickness of 2 ~ 3mm can reach more than 280MPa, 120MPa and 10% respectively, and the mechanical properties of the material are greatly improved. In addition, the tensile strength, yield strength, and elongation of HL-111 alloy after T5 heat treatment at 165 ℃ for 510min reach 302.36 MPa, 190.32 MPa, and 8.42%. The precipitated phase of Mg2Si leads to changes in strength and elongation.


HL-111 alloy; Mn/Mg element ratio; Microstructure; Mechanical properties

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Cai Z, Zhang C, Wang R, et al., Preparation of Al–Si alloys by

a rapid solidification and powder metallurgy route. Mater.

Des, 2015(87): 996-1002.

Dash S S, Li D J, Zeng X Q, et al., Heterogeneous

microstructure and deformation behavior of an automotive

grade aluminum alloy. Alloys Compd, 2021, 870: 159413.

Meschut G, Matzke M, Hoerhold R, et al., Hybrid

Technologies for Joining Ultra-high-strength Boron Steels

with Aluminum Alloys for Lightweight Car Body Structures.

Procedia CIRP, 2014(23): 19-23.

Jiao X Y, Zhang Y F, Wang J, et al., Characterization of

externally solidified crystals in a high-pressure die-cast

AlSi10MnMg alloy and their effect on porosities and

mechanical properties. J Mater Sci Technol 2021, 298:

Dou K, Lordan E, Zhang Y, et al., A novel approach to

optimize mechanical properties for aluminium alloy in High

pressure die casting (HPDC) process combining experiment

and modelling. J Mater Sci Technol, 2021, 296: 117193.

Liu R, Zheng J, Godlewski L, et al., Influence of pore

characteristics and eutectic particles on the tensile

properties of Al–Si–Mn–Mg high pressure die casting alloy.

Mater. Sci. Eng. A, 2020, 783: 139280.

Qiu K, Wang R C., Peng C Q, et al., Effect of individual and

combined additions of Al–5Ti–B, Mn and Sn on sliding wear

behavior of A356 alloy. Trans. Nonferrous Met. Soc. China

, 25, 3886-3892.

Tan P , Yang Y, Sui Y, et al., The influence of Al–10Sr or/and

Al–5Ti–1B on microstructure and mechanical properties of

Al–12Si–4Cu–2Ni–0.8 Mg alloys. J.Alloys Compd, 2019, 809:

Li P, Liu S, Zhang L, Liu X. Grain refinement of A356 alloy by

Al–Ti–B–C master alloy and its effect on mechanical

properties. Mater. Des 2013, 47, 522-528.

Zhao K, Gao T, Yang H, et al., Influence of a new AlTiC–B

master alloy on the casting and extruding behaviors of 7050

alloys. J. Alloys Compd 2020, 820: 153089.

Wang J, Guo Z, Song J L, et al., On the growth mechanism

of the primary silicon particle in a hypereutectic Al-20 wt%Si

alloy using synchrotron X-ray tomography. Mater. Des 2018,

, 176-183.

Wang S R, Ma R, Wang Y Z, et al., Growth mechanism of

primary silicon in cast hypoeutectic Al-Si alloys. Trans.

Nonferrous Met. Soc. China 2012, 22, 1264-1269.

Fang N, Zou C, Wei Z, et al., Microstructural evolution and

mechanical properties of Al–Si–Cu–(Ge)–(Mg) alloy

solidified under high pressure. Mater. Sci. Eng. A 2021, 827:

Xiao Y, Hu Y. Numerical and Experimental Fracture Study

for 7003 Aluminum Alloy at Different Triaxialities.

Met.Mater. Int 2020, 27, 2499-2511.

Naik S N, Walley S M. The Hall–Petch and inverse Hall–

Petch relations and the hardness of nanocrystalline metals.

J. Mater. Sci 2019, 55, 2661-2681.

Loucif A, Figueiredo R B, Baudin T, et al., Ultrafine grains

and the Hall–Petch relationship in an Al–Mg–Si alloy

processed by high-pressure torsion. Mater. Sci. Eng. A 2012,

, 139-145.

Liu L, Zhang Y, Han J, et al., Nanoprecipitate-Strengthened

High-Entropy Alloys. Adv Sci (Weinh) 2021, 8: e2100870.

Suryanarayana C, Al-Aqeeli N. Mechanically alloyed

nanocomposites. Prog. Mater. Sci. 2013, 58, 383-502.



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