{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T09:14:25Z","timestamp":1769159665785,"version":"3.49.0"},"reference-count":44,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2022,12,8]],"date-time":"2022-12-08T00:00:00Z","timestamp":1670457600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Fundamental Research Funds for the Central Universities","award":["JZ2022HGTB0247"],"award-info":[{"award-number":["JZ2022HGTB0247"]}]},{"name":"Fundamental Research Funds for the Central Universities","award":["2022YFE03140000"],"award-info":[{"award-number":["2022YFE03140000"]}]},{"name":"National MCF Energy R&amp;D Program","award":["JZ2022HGTB0247"],"award-info":[{"award-number":["JZ2022HGTB0247"]}]},{"name":"National MCF Energy R&amp;D Program","award":["2022YFE03140000"],"award-info":[{"award-number":["2022YFE03140000"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>As a potential candidate for the next generation of high-temperature alloys, refractory high entropy alloys (RHEAs) have excellent mechanical properties and thermal stability, especially for high-temperature applications, where the processing of RHEAs plays a critical role in engineering applications. In this work, the wire electrical discharge machining (WEDM) performance of WNbMoTaZrx (x = 0.5, 1) RHEAs was investigated, as compared with tungsten, cemented carbide and industrial pure Zr. The cutting efficiency (CE) of the five materials was significantly dependent on the melting points, while the surface roughness (Ra) was not. For the RHEAs, the CE was significantly affected by the pulse-on time (ON), pulse-off time (OFF) and peak current (IP), while the surface roughness was mainly dependent on the ON and IP. The statistical analyses have shown that the CE data of RHEAs have relatively-smaller Weibull moduli than those for the Ra data, which suggests that the CE of RHEAs can be tuned by optimizing the processing parameters. However, it is challenging to tune the surface roughness of RHEAs by tailoring the processing parameters. Differing from the comparative materials, the WEDMed surfaces of the RHEAs showed dense spherical re-solidified particles at upper recast layers, resulting in larger Ra values. The proportion of the upper recast layers can be estimated by the specific discharge energy (SDE). Following the WEDM, the RHEAs maintained the main BCC1 phase, enriched with the W and Ta elements, while the second BCC2 phase in the Zr1.0 RHEA disappeared. Strategies for achieving a better WEDMed surface quality of RHEAs were also proposed and discussed.<\/jats:p>","DOI":"10.3390\/e24121796","type":"journal-article","created":{"date-parts":[[2022,12,9]],"date-time":"2022-12-09T02:20:31Z","timestamp":1670552431000},"page":"1796","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["On the WEDM of WNbMoTaZrx (x = 0.5, 1) Refractory High Entropy Alloys"],"prefix":"10.3390","volume":"24","author":[{"given":"Shunhua","family":"Chen","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Kuang","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Weijie","family":"Chang","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Yong","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Yucheng","family":"Wu","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China"},{"name":"National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1016\/j.msea.2003.10.257","article-title":"Microstructural development in equiatomic multicomponent alloys","volume":"375\u2013377","author":"Cantor","year":"2004","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"eaav2002","DOI":"10.1126\/sciadv.aav2002","article-title":"Outstanding radiation resistance of tungsten-based high-entropy alloys","volume":"5","author":"Li","year":"2019","journal-title":"Sci. Adv."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"107","DOI":"10.1080\/21663831.2014.912690","article-title":"High-Entropy Alloys: A Critical Review","volume":"2","author":"Tsai","year":"2014","journal-title":"Mater. Res. Lett."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1002\/adem.200300567","article-title":"Nanostructured high-entropy alloys with multiple principal elements novel alloy design concepts and outcomes","volume":"6","author":"Yeh","year":"2004","journal-title":"Adv. Eng. Mater."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"515","DOI":"10.1038\/s41578-019-0121-4","article-title":"High-entropy alloys","volume":"4","author":"George","year":"2019","journal-title":"Nat. Rev. Mater."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.pmatsci.2013.10.001","article-title":"Microstructures and properties of high-entropy alloys","volume":"61","author":"Zhang","year":"2014","journal-title":"Prog. Mater. Sci."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"448","DOI":"10.1016\/j.actamat.2016.08.081","article-title":"A critical review of high entropy alloys and related concepts","volume":"122","author":"Miracle","year":"2017","journal-title":"Acta Mater."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1758","DOI":"10.1016\/j.intermet.2010.05.014","article-title":"Refractory high-entropy alloys","volume":"18","author":"Senkov","year":"2010","journal-title":"Intermetallics"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"698","DOI":"10.1016\/j.intermet.2011.01.004","article-title":"Mechanical properties of Nb25Mo25Ta25W25 and V20Nb20Mo20Ta20W20 refractory high entropy alloys","volume":"19","author":"Senkov","year":"2011","journal-title":"Intermetallics"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1016\/j.jallcom.2018.05.067","article-title":"A review on fundamental of high entropy alloys with promising high\u2013temperature properties","volume":"760","author":"Chen","year":"2018","journal-title":"J. Alloys. Compd."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"3092","DOI":"10.1557\/jmr.2018.153","article-title":"Development and exploration of refractory high entropy alloys\u2014A review","volume":"33","author":"Senkov","year":"2018","journal-title":"J. Mater. Res."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1664","DOI":"10.1557\/s43578-022-00569-3","article-title":"Development of high-strength WNbMoTaVZrx refractory high entropy alloys","volume":"37","author":"Li","year":"2022","journal-title":"J. Mater. Res."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1545","DOI":"10.1016\/j.actamat.2012.11.032","article-title":"Low-density, refractory multi-principal element alloys of the Cr\u2013Nb\u2013Ti\u2013V\u2013Zr system: Microstructure and phase analysis","volume":"61","author":"Senkov","year":"2013","journal-title":"Acta Mater."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"153","DOI":"10.1016\/j.matlet.2014.11.162","article-title":"Structure and mechanical properties of a light-weight AlNbTiV high entropy alloy","volume":"142","author":"Stepanov","year":"2015","journal-title":"Mater. Lett."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Zhang, J.S., Chen, S.H., Liu, J.Q., Qing, Z.H., and Wu, Y.C. (2022). Microstructure and Mechanical Properties of Novel High-Strength, Low-Activation Wx(TaVZr)100\u2212x (x = 5, 10, 15, 20, 25) Refractory High Entropy Alloys. Entropy, 24.","DOI":"10.3390\/e24101342"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Chen, S.H., Qi, C., Liu, J.Q., Zhang, J.S., and Wu, Y.C. (2022). Recent Advances in W-Containing Refractory High-Entropy Alloys\u2014An Overview. Entropy, 24.","DOI":"10.3390\/e24111553"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"676","DOI":"10.1016\/j.ijrmhm.2008.10.018","article-title":"Performance of cutting tools in machining Cu\/W alloys for application in EDM electrodes","volume":"27","author":"Davim","year":"2009","journal-title":"Int. J. Refract. Met. Hard Mater."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"919","DOI":"10.1007\/s00170-013-5326-x","article-title":"Problems and solutions in machining of titanium alloys","volume":"70","author":"Pramanik","year":"2013","journal-title":"Int. J. Adv. Manuf. Technol."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Constantin, G., Balan, E., Voiculescu, I., Geanta, V., and Craciun, V. (2020). Cutting Behavior of Al0.6CoCrFeNi High Entropy Alloy. Materials, 13.","DOI":"10.3390\/ma13184181"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"108367","DOI":"10.1016\/j.matdes.2019.108367","article-title":"Investigation on surface morphology and crystalline phase deformation of Al80Li5Mg5Zn5Cu5 high-entropy alloy by ultra-precision cutting","volume":"186","author":"Huang","year":"2020","journal-title":"Mater. Des."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"012008","DOI":"10.1088\/1757-899X\/1147\/1\/012008","article-title":"Influence of the cutting material on tool wear, surface roughness, and force components for different cutting speeds in face turning of CoCrFeNi high-entropy alloys","volume":"1147","author":"Liborius","year":"2021","journal-title":"IOP Conf. Ser. Mater. Sci. Eng."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"308","DOI":"10.1016\/j.cja.2021.01.024","article-title":"Multi-channel discharge characteristics cutting by ultra-fine wire-EDM","volume":"35","author":"Zhang","year":"2022","journal-title":"Chin. J. Aeronaut."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1016\/j.cja.2020.10.034","article-title":"Effect of assisted transverse magnetic field on distortion behavior of thin-walled components in WEDM process","volume":"35","author":"Zhang","year":"2022","journal-title":"Chin. J. Aeronaut."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1247","DOI":"10.1016\/j.ijmachtools.2004.04.017","article-title":"State of the art in wire electrical discharge machining (WEDM)","volume":"44","author":"Ho","year":"2004","journal-title":"Int. J. Mach. Tools. Manuf."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"644","DOI":"10.1016\/j.jmapro.2013.05.001","article-title":"Parametric study along with selection of optimal solutions in dry wire cut machining of cemented tungsten carbide (WC-Co)","volume":"15","author":"Shayan","year":"2013","journal-title":"J. Manuf. Process."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"369","DOI":"10.1016\/j.jmapro.2016.12.010","article-title":"An overview of electric discharge machining of ceramics and ceramic based composites","volume":"25","author":"Pachaury","year":"2017","journal-title":"J. Manuf. Process."},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Sl\u0103tineanu, L., Dodun, O., Cotea\u0163\u0103, M., Nag\u00ee\u0163, G., B\u0103ncescu, I.B., and Hri\u0163uc, A. (2020). Wire Electrical Discharge Machining\u2014A Review. Machines, 8.","DOI":"10.3390\/machines8040069"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"5411","DOI":"10.1007\/s00170-022-09068-5","article-title":"On the wire EDM of metastable atomic structured bulk metallic glasses","volume":"120","author":"Chang","year":"2022","journal-title":"Int. J. Adv. Manuf. Technol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"138","DOI":"10.1016\/j.jmapro.2022.02.013","article-title":"Numerical and experimental study on WEDM of BN-AlN-TiB2 composite ceramics based on a fusion FEM model","volume":"76","author":"Ming","year":"2022","journal-title":"J. Manuf. Process."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"547","DOI":"10.1016\/j.cirpj.2022.05.021","article-title":"WEDM machining of MoNbTaTiZr refractory high entropy alloy","volume":"38","author":"Ceritbinmez","year":"2022","journal-title":"CIRP J. Manuf. Sci. Technol."},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Ceritbinmez, F., G\u00fcnen, A., Akhtar, M.A., Patel, K., Mukherjee, S., Y\u00fcnl\u00fc, L., and Kanca, E. (2022). Surface integrity characteristics in wire-EDM of HfTaTiVZr refractory high entropy alloy. Adv. Mater. Process. Technol., 1\u201318.","DOI":"10.1080\/2374068X.2022.2130869"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"142701","DOI":"10.1016\/j.msea.2022.142701","article-title":"Microstructure and mechanical properties of WNbMoTaZrx (x = 0.1, 0.3, 0.5, 1.0) refractory high entropy alloys","volume":"835","author":"Chen","year":"2022","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"051001","DOI":"10.1115\/1.4049982","article-title":"Temperature of Grinding Carbide With Castor Oil-Based MoS2 Nanofluid Minimum Quantity Lubrication","volume":"13","author":"Sui","year":"2021","journal-title":"J. Therm. Sci. Eng. Appl."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"565","DOI":"10.1016\/j.jmapro.2021.10.055","article-title":"Low-speed machining of a Zr-based bulk metallic glass","volume":"72","author":"Chen","year":"2021","journal-title":"J. Manuf. Process."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"081902","DOI":"10.1063\/1.4986956","article-title":"Thermal conductivity of tungsten: Effects of plasma-related structural defects from molecular-dynamics simulations","volume":"111","author":"Hu","year":"2017","journal-title":"Appl. Phys. Lett."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"1306","DOI":"10.1016\/j.apsusc.2015.08.239","article-title":"On the surface characteristics of a Zr-based bulk metallic glass processed by microelectrical discharge machining","volume":"355","author":"Huang","year":"2015","journal-title":"Appl. Surf. Sci."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"1373","DOI":"10.1016\/j.ijmachtools.2004.04.008","article-title":"Study of specific discharge energy in WEDM and its application","volume":"44","author":"Liao","year":"2004","journal-title":"Int. J. Mach. Tools. Manuf."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1016\/j.jclepro.2018.12.231","article-title":"Comparative study of energy efficiency and environmental impact in magnetic field assisted and conventional electrical discharge machining","volume":"214","author":"Ming","year":"2019","journal-title":"J. Clean. Prod."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"5053","DOI":"10.1016\/j.ijheatmasstransfer.2012.05.004","article-title":"Experimental study of distribution of energy during EDM process for utilization in thermal models","volume":"55","author":"Singh","year":"2012","journal-title":"Int. J. Heat Mass Transf."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"4039","DOI":"10.1007\/s00170-017-0488-6","article-title":"Investigating the energy distribution of workpiece and optimizing process parameters during the EDM of Al6061, Inconel718, and SKD11","volume":"92","author":"Ming","year":"2017","journal-title":"Int. J. Adv. Manuf. Technol."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"3285","DOI":"10.1007\/s00170-017-0772-5","article-title":"Crystallinity, surface morphology, and chemical composition of the recast layer and rutile-TiO2 formation on Ti-6Al-4V ELI by wire-EDM to enhance biocompatibility","volume":"93","author":"Rahman","year":"2017","journal-title":"Int. J. Adv. Manuf. Technol."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"298","DOI":"10.1016\/S0924-0136(03)00765-9","article-title":"The surface characteristics of P\/M high-speed steel (ASP 23) multi-cut with wire electrical discharge machine (WEDM)","volume":"140","author":"Huang","year":"2003","journal-title":"J. Mater. Process. Technol."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1119","DOI":"10.1007\/s12008-018-0474-8","article-title":"Effect of hybrid wire EDM conditions on generation of residual stresses in machining of HCHCr D2 tool steel under ultrasonic vibration","volume":"12","author":"Kumar","year":"2018","journal-title":"Int. J. Interact. Des. Manuf."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"1518","DOI":"10.1080\/10426914.2018.1453143","article-title":"Experimental investigations into electric discharge grinding and ultrasonic vibration-assisted electric discharge grinding of Inconel 601","volume":"33","author":"Mishra","year":"2018","journal-title":"Mater. Manuf. Process."}],"container-title":["Entropy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1099-4300\/24\/12\/1796\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:36:51Z","timestamp":1760146611000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1099-4300\/24\/12\/1796"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,12,8]]},"references-count":44,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2022,12]]}},"alternative-id":["e24121796"],"URL":"https:\/\/doi.org\/10.3390\/e24121796","relation":{},"ISSN":["1099-4300"],"issn-type":[{"value":"1099-4300","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,12,8]]}}}