For the preparation of complex curve coatings via the high-energy micro-arc spark-computer numerical control deposition (HEMAS-CNCD) process, an equi-arc length deposition approach is presented and realised by proposing a new interpolation method of the fixed step plus golden section interpolation (FS + GSI). The simulations and experiments show that the FS + GSI method can carry out the equi-arc length deposition of complex curve coatings with high precision. The AlCoCrFeNi high-entropy alloy coatings are prepared via HEMAS-CNCD using three sets of process parameters. The results of scanning electron microscope and X-ray diffraction show that the three coatings are composed of hexagonal close packed solid solution (as a matrix phase) and body-centred cubic solid solution (as a minor phase).
ChangjunC., MaocaiW., YimingL., DongshengW. and RenJ.: ‘Mass transfer trends and the formation of a single deposition spot during high-energy micro-arc alloying of AZ31 Mg alloy’, J. Mater. Process. Technol., 2008, 198, (1–3), 275–280. doi: 10.1016/j.jmatprotec.2007.07.009
2.
LuoC., XiongX. and DongS.-J.: ‘TiB2/Ni coatings on surface of copper alloy electrode prepared by electrospark deposition’, Trans. Nonferr. Metal. Soc., 2011, 21, (2), 317–321. doi: 10.1016/S1003-6326(11)60715-2
3.
GuoP., ShaoY., ZengC., WuM. and LiW.: ‘Oxidation characterization of FeAl coated 316 stainless steel interconnects by high-energy micro-arc alloying technique for SOFC’, Mater. Lett., 2011, 65, (19–20), 3180–3183. doi: 10.1016/j.matlet.2011.06.032
4.
XieY.-J. and WangM.-C.: ‘A feasibility study of preparing MCrAlX/BN composite coatings by electrospark deposition process’, J. Alloys Compd., 2009, 484, (1–2), 21–24. doi: 10.1016/j.jallcom.2009.05.017
5.
HeardD. W. and BrochuM.: ‘Development of a nanostructure microstructure in the Al–Ni system using the electrospark deposition process’, J. Mater. Process. Technol., 2010, 210, (6–7), 892–898. doi: 10.1016/j.jmatprotec.2010.02.001
6.
CadneyS. and BrochuM.: ‘Formation of amorphous Zr41.2Ti13.8Ni10Cu12.5Be22.5 coatings via the ElectroSpark Deposition process’, Intermetallics, 2008, 16, (4), 518–523. doi: 10.1016/j.intermet.2007.12.013
7.
CadneyS., GoodallG., KimG., MoranA. and BrochuM.: ‘The transformation of an Al-based crystalline electrode material to an amorphous deposit via the electrospark welding process’, J. Alloys Compd., 2009, 476, (1–2), 147–151. doi: 10.1016/j.jallcom.2008.09.017
8.
YehJ.-W., ChenS.-K., LinS.-J., GanJ.-Y., ChinT.-S., ShunT.-T., TsauC.-H. and ChangS.-Y.: ‘Nanostructured high-entropy alloys with multiple principal elements novel alloy design concepts and outcomes’, Adv. Eng. Mater., 2004, 6, (5), 299–303. doi: 10.1002/adem.200300567
9.
CantorB., ChangI. T. H., KnightP. and VincentA. J. B.: ‘Microstructural development in equiatomic multicomponent alloys’, Mater. Sci. Eng. A, 2004, 375–377, 213–218. doi: 10.1016/j.msea.2003.10.257
10.
ZhangH., WuW., HeY., LiM. and GuoS.: ‘Formation of core–shell structure in high entropy alloy coating by laser cladding’, Appl. Surf. Sci., 2016, 363, 543–547. doi: 10.1016/j.apsusc.2015.12.059
11.
ShengW., YangX., WangC. and ZhangY.: ‘Nano-crystallization of high-entropy amorphous NbTiAlSiWxNy films prepared by magnetron sputtering’, Entropy, 2016, 18, (6), 226. doi: 10.3390/e18060226
12.
ShonY., JoshiS. S., KatakamS., Shanker RajamureR. and DahotreN. B.: ‘Laser additive synthesis of high entropy alloy coating on aluminum: corrosion behavior’, Mater. Lett., 2015, 142, 122–125. doi: 10.1016/j.matlet.2014.11.161
13.
WangZ., WangX., YueH., ShiG. and WangS.: ‘Microstructure, thermodynamics and compressive properties of AlCoCrCuMn-x (x = Fe, Ti) high-entropy alloys’, Mater. Sci. Eng. A, 2015, 627, 391–398. doi: 10.1016/j.msea.2015.01.002
14.
LiH. F., XieX. H., ZhaoK., WangY. B., ZhengY. F., WangW. H. and QinL.: ‘In vitro and in vivo studies on biodegradable CaMgZnSrYb high-entropy bulk metallic glass’, Acta Biomater., 2013, 9, (10), 8561–8573. doi: 10.1016/j.actbio.2013.01.029
15.
GludovatzB., HohenwarterA., CatoorD., ChangE. H., GeorgeE. P. and RitchieR. O.: ‘A fracture-resistant high-entropy alloy for cryogenic applications’, Science, 2014, 345, (6201), 1153–1158. doi: 10.1126/science.1254581
16.
ZhangY., ZuoT. T., TangZ., GaoM. C., DahmenK. A., LiawP. K. and LuZ. P.: ‘Microstructures and properties of high-entropy alloys’, Prog. Mater. Sci., 2014, 61, 1–93. doi: 10.1016/j.pmatsci.2013.10.001
17.
ChuangM.-H., TsaiM.-H., WangW.-R., LinS.-J. and YehJ.-W.: ‘Microstructure and wear behavior of AlxCo1.5CrFeNi1.5Tiy high-entropy alloys’, Acta Mater., 2011, 59, (16), 6308–6317. doi: 10.1016/j.actamat.2011.06.041
18.
YuanH., TsaiM.-H., ShaG., LiuF., HoritaZ., ZhuY. and WangJ. T.: ‘Atomic-scale homogenization in an fcc-based high-entropy alloy via severe plastic deformation’, J. Alloys Compd., 2016, 686, 15–23. doi: 10.1016/j.jallcom.2016.05.337
19.
TakeuchiA., AmiyaK., WadaT. and YubutaK.: ‘Dual HCP structures formed in senary ScYLaTiZrHf multi-principal-element alloy’, Intermetallics, 2016, 69, 103–109. doi: 10.1016/j.intermet.2015.10.022
20.
ChenY.-L., TsaiC.-W., JuanC.-C., ChuangM.-H., YehJ.-W., ChinT.-S. and ChenS.-K.: ‘Amorphization of equimolar alloys with HCP elements during mechanical alloying’, J. Alloys Compd., 2010, 506, (1), 210–215. doi: 10.1016/j.jallcom.2010.06.179
LiQ. H., YueT. M., GuoZ. N. and LinX.: ‘Microstructure and corrosion properties of AlCoCrFeNi high entropy alloy coatings deposited on AISI 1045 steel by the electrospark process’, Metall. Mater. Trans. A, 2012, 44, (4), 1767–1778. doi: 10.1007/s11661-012-1535-4
23.
WangX.-R., WangZ.-Q., HeP., LinT.-S. and ShiY.: ‘Microstructure and wear properties of CuNiSiTiZr high-entropy alloy coatings on TC11 titanium alloy produced by electrospark computer numerical control deposition process’, Surf. Coat. Technol., 2015, 283, (15), 156–161. doi: 10.1016/j.surfcoat.2015.10.013
24.
WangX.-R., WangZ.-Q., HeP. and LinT.-S.: ‘The high-energy micro-arc spark—computer numerical control deposition of planar NURBS curve coatings’, Int. J. Adv. Manuf. Technol., 2016, doi:10.1007/s00170-016-8698-x.
25.
WangW.-R., WangW.-L., WangS.-C., TsaiY.-C., LaiC.-H. and YehJ.-W.: ‘Effects of Al addition on the microstructure and mechanical property of AlxCoCrFeNi high-entropy alloys’, Intermetallics, 2012, 26, 44–51. doi: 10.1016/j.intermet.2012.03.005
