{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,5]],"date-time":"2026-03-05T04:07:16Z","timestamp":1772683636279,"version":"3.50.1"},"reference-count":42,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2018,11,6]],"date-time":"2018-11-06T00:00:00Z","timestamp":1541462400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004083","name":"Ministry of Science ICT and Future Planning","doi-asserted-by":"publisher","award":["NRF- 2016M3D1A1023383"],"award-info":[{"award-number":["NRF- 2016M3D1A1023383"]}],"id":[{"id":"10.13039\/501100004083","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004083","name":"Ministry of Science ICT and Future Planning","doi-asserted-by":"publisher","award":["KRF-2017H1D3A1A01013666"],"award-info":[{"award-number":["KRF-2017H1D3A1A01013666"]}],"id":[{"id":"10.13039\/501100004083","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>Annealing of severely plastic deformed materials is expected to produce a good combination of strength and ductility, which has been widely demonstrated in conventional materials. In the present study, high-pressure torsion processed CoCrNi medium entropy alloy consisting of a single face-centered cubic (FCC) phase with a grain size of ~50 nm was subjected to different annealing conditions, and its effect on microstructure and mechanical behavior was investigated. The annealing of high-pressure torsion processed CoCrNi alloy exhibits partial recrystallization and near full recrystallization based on the annealing temperature and time. The samples annealed at 700 \u00b0C for 2 min exhibit very fine grain size, a high fraction of low angle grain boundaries, and high kernel average misorientation value, indicating partially recrystallized microstructure. The samples annealed for a longer duration (&gt;2 min) exhibit relatively larger grain size, a low fraction of low angle grain boundaries, and low kernel average misorientation value, indicating nearly full recrystallized microstructure. The annealed samples with different microstructures significantly influence the uniform elongation, tensile strength, and work hardening rate. The sample annealed at 700 \u00b0C for 15 min exhibits a remarkable combination of tensile strength (~1090 MPa) and strain to failure (~41%).<\/jats:p>","DOI":"10.3390\/e20110849","type":"journal-article","created":{"date-parts":[[2018,11,7]],"date-time":"2018-11-07T03:45:22Z","timestamp":1541562322000},"page":"849","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":54,"title":["Effect of Annealing on Microstructure and Tensile Behavior of CoCrNi Medium Entropy Alloy Processed by High-Pressure Torsion"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8803-3509","authenticated-orcid":false,"given":"Praveen","family":"Sathiyamoorthi","sequence":"first","affiliation":[{"name":"Department of Material Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"},{"name":"Center for High Entropy Alloys, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"}]},{"given":"Jae Wung","family":"Bae","sequence":"additional","affiliation":[{"name":"Department of Material Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"},{"name":"Center for High Entropy Alloys, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"}]},{"given":"Peyman","family":"Asghari-Rad","sequence":"additional","affiliation":[{"name":"Department of Material Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"},{"name":"Center for High Entropy Alloys, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"}]},{"given":"Jeong Min","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Material Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"},{"name":"Center for High Entropy Alloys, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"}]},{"given":"Jung Gi","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Material Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3155-583X","authenticated-orcid":false,"given":"Hyoung Seop","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Material Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"},{"name":"Center for High Entropy Alloys, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"},{"name":"Graduate Institute of Ferrous Technology (GIFT), Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea"}]}],"member":"1968","published-online":{"date-parts":[[2018,11,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1700645","DOI":"10.1002\/adem.201700645","article-title":"High-Entropy Alloys: Potential Candidates for High-Temperature Applications\u2014An Overview","volume":"20","author":"Praveen","year":"2018","journal-title":"Adv. Eng. Mater."},{"key":"ref_2","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_3","doi-asserted-by":"crossref","first-page":"15719","DOI":"10.1038\/ncomms15719","article-title":"Cryogenic strength improvement by utilizing room-temperature deformation twinning in a partially recrystallized VCrMnFeCoNi high-entropy alloy","volume":"8","author":"Jo","year":"2017","journal-title":"Nat. Commun."},{"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","unstructured":"Murty, B.S., Yeh, J.-W., and Ranganathan, S. (2014). High-Entropy Alloys, Butterworth-Heinemann.","DOI":"10.1016\/B978-0-12-800251-3.00002-X"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2254","DOI":"10.1007\/s11837-015-1583-5","article-title":"Physical Metallurgy of High-Entropy Alloys","volume":"67","author":"Yeh","year":"2015","journal-title":"JOM"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"338","DOI":"10.1016\/j.msea.2018.07.107","article-title":"Annealing-induced hardening in high-pressure torsion processed CoCrNi medium entropy alloy","volume":"734","author":"Praveen","year":"2018","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"10602","DOI":"10.1038\/ncomms10602","article-title":"Exceptional damage-tolerance of a medium-entropy alloy CrCoNi at cryogenic temperatures","volume":"7","author":"Gludovatz","year":"2016","journal-title":"Nat. Commun."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1016\/j.scriptamat.2017.02.042","article-title":"Friction stress and Hall-Petch relationship in CoCrNi equi-atomic medium entropy alloy processed by severe plastic deformation and subsequent annealing","volume":"134","author":"Yoshida","year":"2017","journal-title":"Scr. Mater."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"407","DOI":"10.1016\/j.actamat.2018.02.016","article-title":"Dynamic shear deformation of a CrCoNi medium-entropy alloy with heterogeneous grain structures","volume":"148","author":"Ma","year":"2018","journal-title":"Acta Mater."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"324","DOI":"10.1016\/j.msea.2017.07.079","article-title":"Trade-off between tensile property and formability by partial recrystallization of CrMnFeCoNi high-entropy alloy","volume":"703","author":"Bae","year":"2017","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"5743","DOI":"10.1016\/j.actamat.2013.06.018","article-title":"The influences of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy","volume":"61","author":"Otto","year":"2013","journal-title":"Acta Mater."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"74","DOI":"10.1016\/j.intermet.2013.03.018","article-title":"Tensile properties of high- and medium-entropy alloys","volume":"39","author":"Gali","year":"2013","journal-title":"Intermetallics"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Wu, Z., Guo, W., Jin, K., Poplawsky, J.D., Gao, Y., and Bei, H. (2018). Enhanced strength and ductility of a tungsten-doped CoCrNi medium-entropy alloy. J. Mater. Res., 1\u20139.","DOI":"10.1557\/jmr.2018.247"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1016\/j.matdes.2017.07.054","article-title":"Enhanced strength and ductility of bulk CoCrFeMnNi high entropy alloy having fully recrystallized ultrafine-grained structure","volume":"133","author":"Sun","year":"2017","journal-title":"Mater. Des."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"366","DOI":"10.1016\/j.actamat.2018.04.004","article-title":"Boron doped ultrastrong and ductile high-entropy alloys","volume":"151","author":"Seol","year":"2018","journal-title":"Acta Mater."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"88","DOI":"10.1016\/j.scriptamat.2017.05.019","article-title":"Precipitation strengthening of ductile Cr 15 Fe 20 Co 35 Ni 20 Mo 10 alloys","volume":"137","author":"Ming","year":"2017","journal-title":"Scr. Mater."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1016\/j.intermet.2014.05.014","article-title":"Microstructural evolution after thermomechanical processing in an equiatomic, single-phase CoCrFeMnNi high-entropy alloy with special focus on twin boundaries","volume":"54","author":"Otto","year":"2014","journal-title":"Intermetallics"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"428","DOI":"10.1016\/j.actamat.2014.08.026","article-title":"Temperature dependence of the mechanical properties of equiatomic solid solution alloys with face-centered cubic crystal structures","volume":"81","author":"Wu","year":"2014","journal-title":"Acta Mater."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1016\/j.intermet.2018.07.014","article-title":"Effect of annealing on the microstructure and texture of cold rolled CrCoNi medium-entropy alloy","volume":"101","author":"Skrotzki","year":"2018","journal-title":"Intermetallics"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"419","DOI":"10.1016\/j.actamat.2017.09.018","article-title":"Using heat treatments, high-pressure torsion and post-deformation annealing to optimize the properties of Ti-6Al-4V alloys","volume":"141","author":"Shahmir","year":"2017","journal-title":"Acta Mater."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"893","DOI":"10.1016\/j.pmatsci.2008.03.002","article-title":"Using high-pressure torsion for metal processing: Fundamentals and applications","volume":"53","author":"Zhilyaev","year":"2008","journal-title":"Prog. Mater. Sci."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Torbati-Sarraf, S.A., Sabbaghianrad, S., and Langdon, T.G. (2018). Using Post-Deformation Annealing to Optimize the Properties of a ZK60 Magnesium Alloy Processed by High-Pressure Torsion. Adv. Eng. Mater., 20.","DOI":"10.1002\/adem.201700703"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"394","DOI":"10.1016\/j.msea.2018.08.079","article-title":"Ultra-high tensile strength nanocrystalline CoCrNi equi-atomic medium entropy alloy processed by high-pressure torsion","volume":"735","author":"Praveen","year":"2018","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"150","DOI":"10.1016\/j.intermet.2017.09.002","article-title":"Severe plastic deformation driven nanostructure and phase evolution in a Al 0.5 CoCrFeMnNi dual phase high entropy alloy","volume":"91","author":"Reddy","year":"2017","journal-title":"Intermetallics"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"11813","DOI":"10.1007\/s10853-018-2456-4","article-title":"Effect of carbon content and annealing on structure and hardness of CrFe2NiMnV0.25 high-entropy alloys processed by high-pressure torsion","volume":"53","author":"Shahmir","year":"2018","journal-title":"J. Mater. Sci."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"258","DOI":"10.1016\/j.actamat.2015.06.025","article-title":"Mechanical properties, microstructure and thermal stability of a nanocrystalline CoCrFeMnNi high-entropy alloy after severe plastic deformation","volume":"96","author":"Schuh","year":"2015","journal-title":"Acta Mater."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"7148","DOI":"10.1007\/s10853-008-3021-3","article-title":"Deformation mechanism and texture and microstructure evolution during high-speed rolling of AZ31B Mg sheets","volume":"43","author":"Li","year":"2008","journal-title":"J. Mater. Sci."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1016\/j.matdes.2013.12.029","article-title":"Effect of prestrain on tensile properties and ratcheting behaviour of Ti-stabilised interstitial free steel","volume":"57","author":"De","year":"2014","journal-title":"Mater. Des."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1581","DOI":"10.4028\/www.scientific.net\/AMR.168-170.1581","article-title":"Effects of Low-Angle Grain Boundaries on the Yield-Strength Ratio of High Grade Pipeline Steels","volume":"168\u2013170","author":"Xu","year":"2010","journal-title":"Adv. Mater. Res."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"285","DOI":"10.1016\/S0921-5093(00)00796-6","article-title":"Comparison of fatigue cracking possibility along large- and low-angle grain boundaries","volume":"284","author":"Zhang","year":"2000","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"4171","DOI":"10.1016\/S1359-6454(99)00275-X","article-title":"The control of brittleness and development of desirable mechanical properties in polycrystalline systems by grain boundary engineering","volume":"47","author":"Watanabe","year":"1999","journal-title":"Acta Mater."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"227","DOI":"10.1016\/j.scriptamat.2011.10.043","article-title":"Enhanced strength\u2013ductility synergy in nanostructured Cu and Cu\u2013Al alloys processed by high-pressure torsion and subsequent annealing","volume":"66","author":"An","year":"2012","journal-title":"Scr. Mater."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"912","DOI":"10.1038\/nature01133","article-title":"High tensile ductility in a nanostructured metal","volume":"419","author":"Wang","year":"2002","journal-title":"Nature"},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Chang, L., Zhou, C.-Y., and He, X.-H. (2017). The Effects of Prestrain and Subsequent Annealing on Tensile Properties of CP-Ti. Metals, 7.","DOI":"10.3390\/met7030099"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"16707","DOI":"10.1038\/srep16707","article-title":"Significant contribution of stacking faults to the strain hardening behavior of Cu-15%Al alloy with different grain sizes","volume":"5","author":"Tian","year":"2015","journal-title":"Sci. Rep."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1080\/21663831.2014.958586","article-title":"Effect of Microstructure on the Deformation Mechanism of Friction Stir-Processed Al0.1CoCrFeNi High Entropy Alloy","volume":"3","author":"Komarasamy","year":"2014","journal-title":"Mater. Res. Lett."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"40704","DOI":"10.1038\/srep40704","article-title":"Interstitial atoms enable joint twinning and transformation induced plasticity in strong and ductile high-entropy alloys","volume":"7","author":"Li","year":"2017","journal-title":"Sci. Rep."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"125","DOI":"10.1016\/j.scriptamat.2017.08.006","article-title":"Remarkable strength of CoCrFeNi high-entropy alloy wires at cryogenic and elevated temperatures","volume":"141","author":"Huo","year":"2017","journal-title":"Scr. Mater."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"801","DOI":"10.1016\/j.scriptamat.2004.06.002","article-title":"Hall\u2013Petch relation and boundary strengthening","volume":"51","author":"Hansen","year":"2004","journal-title":"Scr. Mater."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"269","DOI":"10.1016\/j.intermet.2017.10.004","article-title":"Stacking fault energy of face-centered-cubic high entropy alloys","volume":"93","author":"Liu","year":"2018","journal-title":"Intermetallics"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"35863","DOI":"10.1038\/srep35863","article-title":"Size effect, critical resolved shear stress, stacking fault energy, and solid solution strengthening in the CrMnFeCoNi high-entropy alloy","volume":"6","author":"Okamoto","year":"2016","journal-title":"Sci. Rep."}],"container-title":["Entropy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1099-4300\/20\/11\/849\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T15:28:08Z","timestamp":1760196488000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1099-4300\/20\/11\/849"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,11,6]]},"references-count":42,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2018,11]]}},"alternative-id":["e20110849"],"URL":"https:\/\/doi.org\/10.3390\/e20110849","relation":{},"ISSN":["1099-4300"],"issn-type":[{"value":"1099-4300","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,11,6]]}}}