In the present study, non-equiatomic AlCrFeMnx−TiNi high-entropy alloys bearing cost-effective elements were developed in light of enhancing mechanical strength. The Al5Cr12Fe35Mn28Ni20 HEA was used as a reference. However, the HEA containing Ti (Ti-HEA) was designed with a composition of Al5Cr12Fe35Mn23Ni20Ti5. The microstructural characteristics were studied by X-ray diffraction, electron probe micro-analysis, and electron backscattering diffraction. Subsequently, the mechanical properties were determined using micro-hardness, tensile and compression tests. Whereas the Ti-free HEA displayed a single FCC structure, a multi-phase structure was observed in the Ti-HEA. The mechanical tests showed that the Ti element significantly enhanced the strength. The strengthening effect was more intense during compression loading as the Ti-HEA exhibited superior combination of compressive strength and ductility (2.35GPa at 50% strain without fracture).
ZhangYZuoTTTangZMicrostructures and properties of high-entropy alloys. Prog Mater Sci. 2013;61:1–93. DOI:10.1016/j.pmatsci.2013.10.001
2.
YehJ.Alloy design strategies and future trends in high-entropy alloys. Miner Met Mater Soc. 2013;65(12):1759–1771. DOI:10.1007/s11837-013-0761-6
3.
SenkovONMillerJDMiracleDBAlloys with solid solution phases. Nat Commun. 2015;6(1):1–10.
4.
ZhaoYJQiaoJWMaSGA hexagonal close-packed high-entropy alloy: the effect of entropy. Mater Des. 2016;96:10–15. DOI:10.1016/j.matdes.2016.01.149
5.
TsaiMYehJTsaiMHigh-entropy alloys: a critical review. Mater Res Lett.2014;2(3):107–123. DOI:10.1080/21663831.2014.912690
6.
ZhangBYZhouYJLinJPSolid-solution phase formation rules for multi-component alloys. Adv Eng Mater. 2008;10(6):534–538. DOI:10.1002/adem.200700240
7.
SenkovONMiracleDB.A new thermodynamic parameter to predict formation of solid solution or intermetallic phases in high entropy alloys. J Alloys Compd. 2016;658:603–607. DOI:10.1016/j.jallcom.2015.10.279
8.
HuangBPYehJ.Multi-principal-element alloys with improved oxidation and wear resistance for thermal spray coating. Adv Eng Mater. 2004;6(12):74–78. DOI:10.1002/adem.200300507
9.
MiracleDBSenkovON.A critical review of high entropy alloys and related concepts. Acta Mater. 2017;122:448–511. DOI:10.1016/j.actamat.2016.08.081
10.
YehJWChenSKLinSJNanostructured high-entropy alloys with multiple principal elements: novel alloy design concepts and outcomes. Adv Eng Mater. 2004;6(5):299–303+274. DOI:10.1002/adem.200300567
11.
ChenYYHongUTShihHCElectrochemical kinetics of the high entropy alloys in aqueous environments—a comparison with type 304 stainless steel. Corros Sci. 2005;47(11):2679–2699. DOI:10.1016/j.corsci.2004.09.026
12.
ZhouYJZhangYWangYLSolid solution alloys of AlCoCrFeNiTix with excellent room-temperature mechanical properties. Appl Phys Lett. 2012;90(18):181904–181904-3. DOI:10.1063/1.2734517
13.
MiracleDBMillerJDSenkovONExploration and development of high entropy alloys for structural applications. Entropy. 2014;16(1):494–525. DOI:10.3390/e16010494
14.
CantorBChangITHKnightPMicrostructural development in equiatomic multicomponent alloys. Mater Sci Eng A. 2004;375–377:213–218. DOI:10.1016/j.msea.2003.10.257
15.
OttoFYangYBeiHRelative effects of enthalpy and entropy on the phase stability of equiatomic high-entropy alloys. Acta Mater. 2013;61(7):2628–2638. DOI:10.1016/j.actamat.2013.01.042
16.
StepanovNTikhonovskyMYurchenkoNEffect of cryo-deformation on structure and properties of CoCrFeNiMn high-entropy alloy. Intermetallics. 2015;59:8–17. DOI:10.1016/j.intermet.2014.12.004
17.
SalishchevGATikhonovskyMAShaysultanovDGEffect of Mn and v on structure and mechanical properties of high-entropy alloys based on CoCrFeNi system. J Alloys Compd. 2014;591:11–24. DOI:10.1016/j.jallcom.2013.12.210
18.
LaplancheGGadaudPHorstOTemperature dependencies of the elastic moduli and thermal expansion coefficient of an equiatomic, single-phase CoCrFeMnNi high-entropy alloy. J Alloys Compd. 2015;623:348–353. DOI:10.1016/j.jallcom.2014.11.061
19.
KaoYFChenTJChenSKMicrostructure and mechanical property of as-cast, -homogenized, and -deformed AlxCoCrFeNi (0 ≤ x ≤ 2) high-entropy alloys. J Alloys Compd. 2009;488(1):57–64. DOI:10.1016/j.jallcom.2009.08.090
20.
HeJYLiuWHWangHEffects of Al addition on structural evolution and tensile properties of the FeCoNiCrMn high-entropy alloy system. Acta Mater. 2014;62:105–113. DOI:10.1016/j.actamat.2013.09.037
21.
HouJZhangMMaSStrengthening in Al0.25CoCrFeNi high-entropy alloys by cold rolling. Mater Sci Eng A. 2017;707:593–601. DOI:10.1016/j.msea.2017.09.089
22.
LuZPAn assessment on the future development of high-entropy alloys: summary from a recent workshop. Intermetallics. 2015;66:67–76.
23.
ElkatatnySGepreelMAHHamadaAS.Effect of cold rolling on the microstructure and hardness of Al5Cr12Fe35Mn28Ni20 high entropy alloy. In: Materials Science Forum. Vol 917. Trans Tech; 2018. p. 241–245. Trans Tech Publications Ltd, 2018.
24.
ElkatatnySGepreelMAHamadaAEffect of Al content and cold rolling on the microstructure and mechanical properties of Al5Cr12Fe35Mn28Ni20 high-entropy alloy. Mater Sci Eng A. 2019;759:380–390.
25.
Abdel-GhanyAWElkatatnySGepreelMAH.Microstructure and mechanical properties investigation of new Al10Cr12Mn28Fe (50-x) Ni (x) high entropy alloys. In Materials Science Forum. Trans Tech Publications Ltd. Vol. 998. Trans Tech; 2020: 9–14.
26.
NgCGuoSLuanJEntropy-driven phase stability and slow diffusion kinetics in an Al0.5CoCrCuFeNi high entropy alloy. Intermetallics. 2012;31:165–172.
27.
LiBSWangYPRenMXEffects of Mn, Ti and V on the microstructure and properties of AlCrFeCoNiCu high entropy alloy. Mater Sci Eng A. 2008;498(1-2):482–486.
28.
TakeuchiAInoueA.Intermetallics mixing enthalpy of liquid phase calculated by miedema's scheme and approximated with sub-regular solution model for assessing forming ability of amorphous and glassy alloys. Intermetallics. 2010;18(9):1779–1789.
29.
YanJFangWHuangJPlastic deformation mechanism of CoCrxNi medium entropy alloys. Mater Sci Eng A. 2021;814:141181.
30.
BatsanovSS.Van der Waals radii of elements. Inorg Mater. 2001;37(9):871–885.
31.
SenkovONMiracleDB.Effect of the atomic size distribution on glass forming ability of amorphous metallic alloys. Mater Res Bull. 2001;36(12):2183–2198.
32.
YiJYangLWangLNovel, equimolar, multiphase CoCuNiTiV high entropy alloy: phase component, microstructure, and compressive properties. Met Mater Int. 2021;27(7):2387–2394.
