Research and Application of Materials Science

Effects of Si Addition on Microstructure, Properties and Serration Behaviors of Lightweight Al-Mg-Zn-Cu Medium-entropy Alloys

LiYasong, LiRuixuan, ZhangYong

Abstract


A series of as-cast lightweight multicomponent alloys Al(86-x)Mg10Zn2 Cu2 Six (x=0, 0.3, 0.6, 0.9, 1.2 at.%) were prepared by a vacuum induction furnace with a steel die. With the addition of Si, the reticular white Al-Cu phase deposited were gradually replaced by the gray eutectic Mg-Si phase, while the compressive strength of the alloys increases first and then decreases slowly. It is particularly noteworthy that the compression plasticity also exhibits this trend. When the Si content is 0.9 at.%, the compressive strength reaches its maximum at 779.11 MPa and the compressive plasticity reaches 20.91%. The effect of the addition of Si on the serration behavior of alloy was also studied; we found that the addition of Si introduces a new MgSi phase, and with the change of Si is significantly affects the morphology of the precipitated phase, which affects the serration behavior of the alloys. The comprehensive mechanical properties of the alloy are optimal at the critical point where the serration behavior disappears.In this work, we have provided a method and a composition for the preparation of a low-cost, high-strength, lightweight medium-entropy alloys.

Keywords


Si Addition; Microstructure and Properties; Serration Behavior; Lightweight, Medium-entropy Alloys

Full Text:

PDF

References


Li H, Cao F, Guo S, et al. Effects of Mg and Cu on microstructures and properties of spray-deposited Al-Zn-Mg-Cualloys[J]. Journal of Alloys and Compounds. 2017, 719: 89-96.

G. M H, Jacobs, Spencer P J. Thermodynamic evaluations of the systems A1-Si-Zn and Cu-Mg-Ni[J]. Journal of Alloys and Compounds. 1995, 220: 15-18.

Shu W X, Hou L G, Zhang C, et al. Tailored Mg and Cu contents affecting the microstructures and mechanical properties of high-strength Al–Zn–Mg–Cu alloys[J]. Materials Science and Engineering: A. 2016, 657: 269-283.

Jung J, Park S H, Yu H, et al. Improved mechanical properties of Mg–7.6Al–0.4Zn alloy through aging prior to extrusion[J].Scripta Materialia. 2014, 93: 8-11.

Li Q, Zhao Y, Luo Q, et al. Experimental study and phase diagram calculation in Al–Zn–Mg–Si quaternary system[J]. Journal of Alloys and Compounds. 2010, 501(2): 282-290.

Li C, Sun J, Li Z, et al. Microstructure and corrosion behavior of Al–10%Mg 2 Si cast alloy after heat treatment[J]. Materials Characterization. 2016, 122: 142-147.

Zhang Y, Zuo T T, Tang Z, et al. Microstructures and properties of high-entropy alloys[J]. Progress in Materials Science. 2014, 61:1-93.

Miracle D B, Senkov O N. A critical review of high entropy alloys and related concepts[J]. Acta Materialia. 2017, 122: 448-511.

Zhang W, Liaw P K, Zhang Y. Science and technology in high-entropy alloys[J]. Science China Materials. 2018, 61(1): 2-22.

Yan X H, Li J S, Zhang W R, et al. A brief review of high-entropy films[J]. Materials Chemistry and Physics. 2018, 210: 12-19.

Cai Z, Cui X, Liu Z, et al. Microstructure and wear resistance of laser cladded Ni-Cr-Co-Ti-V high-entropy alloy coating after laser remelting processing[J]. Optics & Laser Technology. 2018, 99: 276-281.

Gao L, Liao W, Zhang H, et al. Microstructure, Mechanical and Corrosion Behaviors of CoCrFeNiAl0.3 High Entropy Alloy (HEA) Films[J]. Coatings. 2017, 7(10): 156.

Yao Qiu, Sebastian Thomas, Mark A. Gibson, et al. Corrosion of high entropy alloys[J]. npj Materials Degradation. 2017(1): 1-18.

Youssef K M, Zaddach A J, Niu C, et al. A Novel Low-Density, High-Hardness, High-entropy Alloy with Close-packed Single-phase Nanocrystalline Structures[J]. Materials Research Letters. 2015, 3(2): 95-99.

Tseng K, Yang Y, Juan C, et al. A light-weight high-entropy alloy Al20Be20Fe10Si15Ti35[J]. Science China Technological Sciences. 2018, 61(2): 184-188.

Feng R, Gao M C, Zhang C, et al. Phase stability and transformation in a light-weight high-entropy alloy[J]. Acta Materialia. 2018, 146: 280-293.

Du X H, Wang R, Chen C, et al. Preparation of a LightWeight MgCaAlLiCu High-Entropy Alloy[J]. Key Engineering Materials. 2017, 727: 132-135.

Li R, Gao J C, Fan K. Study to Microstructure and Mechanical Properties of Mg Containing High Entropy Alloys[J]. Materials Science Forum. 2010, 650: 265-271.

Li R, Gao J C, Fan K. Microstructure and Mechanical Properties of MgMnAlZnCu High Entropy Alloy Cooling in Three Conditions[J]. Materials Science Forum. 2011, 686: 235-241.

Yang X, Chen S Y, Cotton J D, et al. Phase Stability of Low-Density, Multiprincipal Component Alloys Containing Aluminum, Magnesium, and Lithium[J]. JOM. 2014, 66(10): 2009-2020.

Baek E, Ahn T, Jung J, et al. Effects of ultrasonic melt treatment and solution treatment on the microstructure and mechanical properties of low-density multicomponent Al70Mg10Si10Cu5Zn5 alloy[J]. Journal of Alloys and Compounds. 2017, 696: 450-459.

Ahn T, Jung J, Baek E, et al. Temperature dependence of precipitation behavior of Al–6Mg–9Si–10Cu–10Zn–3Ni natural composite and its impact on mechanical properties[J]. Materials Science and Engineering: A. 2017, 695: 45-54.

Ahn T, Jung J, Baek E, et al. Temporal evolution of precipitates in multicomponent Al–6Mg–9Si–10Cu–10Zn–3Ni alloy studied by complementary experimental methods[J]. Journal of Alloys and Compounds. 2017, 701: 660-668.

Li R, Wang Z, Guo Z, et al. Graded microstructures of Al-Li-Mg-Zn-Cu entropic alloys under supergravity[J]. Science China Materials. 2018.

Hallstedt B. Molar volumes of Al, Li, Mg and Si[J]. Calphad. 2007, 31(2): 292-302.

Liu Y, Zhang Y, Yu W, et al. Pre-nucleation clusters mediated crystallization in Al–Si melts[J]. Scripta Materialia. 2016, 110: 87-91.

Sanchez J, Vicario I, Albizuri J, et al. Compound Formation and Microstructure of As-Cast High Entropy Aluminums[J]. Metals. 2018, 8(3): 167.

Xu X, Yang Z, Ye Y, et al. Effects of various Mg/Si ratios on microstructure and performance property of Al-Mg-Si alloy cables[J]. Materials Characterization. 2016, 119: 114-119.

Tao G H, Liu C H, Chen J H, et al. The influence of Mg/Si ratio on the negative natural aging effect in Al–Mg–Si–Cu alloys[J]. Materials Science and Engineering: A. 2015, 642: 241-248.

Li H, Cao F, Guo S, et al. Microstructures and properties evolution of spray-deposited Al-Zn-Mg-Cu-Zr alloys with scandium addition[J]. Journal of Alloys and Compounds. 2017, 691: 482-488.

Guo M X, Zhang Y, Zhang X K, et al. Non-isothermal precipitation behaviors of Al-Mg-Si-Cu alloys with different Zn contents[J]. Materials Science and Engineering: A. 2016, 669: 20-32.

Shao L, Zhang T, Li L, et al. A Low-Cost Lightweight Entropic Alloy with High Strength[J]. Journal of Materials Engineering and Performance. 2018.

Mccormick P G, Ling C P. Numerical modelling of the Portevin—Le Chatelier effect[J]. Acta Metallurgica et Materialia. 1995, 43(5): 1969-1977.

Zhang S, Mccormick P G, Estrin Y. The morphology of Portevin–Le Chatelier bands: finite element simulation for Al–Mg–Si[J]. Acta Materialia. 2001, 49(6): 1087-1094.

Hutanu R, Clapham L, Rogge R B. Intergranular strain and texture in steel Luders bands[J]. Acta Materialia. 2005, 53: 3517-3524.

Yanga F. Plastic flow in bulk metallic glasses: Effect of strain rate[J]. APPLIED PHYSICS LETTERS. 2007(91).

Wei-Hua W. The nature and properties of amorphous matter[J]. PROGRESS IN PHYSICS. 2013, 33(5): 177-351.

Chen S, Yang X, Dahmen K, et al. Microstructures and Crackling Noise of AlxNbTiMoV High Entropy Alloys[J]. Entropy. 2014, 16(2): 870-884.

Chen S, Li W, Xie X, et al. Nanoscale serration and creep characteristics of Al0.5CoCrCuFeNi high-entropy alloys[J]. Journal of Alloys and Compounds. 2018(752): 464-475.

Chen S, Xie X, Li W, et al. Temperature effects on the serrated behavior of an Al 0.5 CoCrCuFeNi high-entropy alloy[J]. Materials Chemistry and Physics. 2018, 210: 20-28.

Zhang Y, Liu J P, Chen S Y, et al. Serration and noise behaviors in materials[J]. Progress in Materials Science. 2017, 90: 358-460.

Kocks R A M F. New observations on the mechanisms of dynamic strain aging and of jerky flow[J]. Acta Metallurgica. 1979, Issue 7(Volume 27): 1125-1134.

Cottrell A H. CRYSTALS, DISLOCATIONS AND PLASTIC FLOW[Z]. London: OXFORD AT THE CLARENDON PRESS, 1953134.




DOI: https://doi.org/10.33142/msra.v1i1.666

Refbacks

  • There are currently no refbacks.


Copyright (c) 2019 Yasong Li, Ruixuan Li, Yong Zhang

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