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A comparative study on the evolution of microstructure and hardness during monotonic and cyclic high pressure torsion of CoCuFeMnNi high entropy alloy

Published online by Cambridge University Press:  06 February 2019

Reshma Sonkusare ,
Nimish Khandelwal ,
Pradipta Ghosh ,
Krishanu Biswas  and
Nilesh Prakash Gurao Open the ORCID record for Nilesh Prakash Gurao [Opens in a new window]
Reshma Sonkusare
Affiliation:
Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
Nimish Khandelwal
Affiliation:
Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India; and Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology Jaipur, Jaipur 302017, India
Pradipta Ghosh
Affiliation:
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Leoben 8700, Austria
Krishanu Biswas
Affiliation:
Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
Nilesh Prakash Gurao*
Affiliation:
Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
*
a)Address all correspondence to this author. e-mail: npgurao@iitk.ac.in
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Abstract

Discs of CoCuFeMnNi face centered cubic high entropy alloy were subjected to monotonic and cyclic high pressure torsion (HPT) in a single step and multiple steps of 5° forward and reverse cycle for 100° and 360° twist, respectively, under 5 GPa pressure at room temperature. It was observed that the 100° cyclic HPT sample shows the highest hardness at the periphery comparable to 360° monotonic HPT sample, while the cyclic 360° HPT sample shows the lowest hardness throughout the sample. High hardness of 100° cyclic HPT sample can be attributed to finer grain size and unstable dislocation substructure by continuous change in strain path from initial compression to forward–reverse torsion, while stable dislocation structure corresponding to shear contributes to increase in hardness from 100° to 360° for monotonic HPT sample. The unstable dislocation substructure promotes grain boundary migration–enabled grain growth leading to low hardness throughout the 360° cyclic HPT sample.

Keywords

dislocationsgrain sizehardness
Type
Invited Paper
Information
Journal of Materials Research , Volume 34 , Issue 5: Focus Issue: Nanocrystalline High Entropy Materials: Processing Challenges and Properties , 14 March 2019 , pp. 732 - 743
Copyright
Copyright © Materials Research Society 2019 

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References

Valiev, R.Z., Islamgaliev, R.K., and Alexandrov, I.V.: Bulk nanostructured materials from sever plastic deformation. Prog. Mater. Sci. 45, 103–189 (2000).CrossRefGoogle Scholar
Valiev, R.Z.: Nanostructuring of metals by severe plastic deformation for advanced properties. Nat. Mater. 3, 511–516 (2004).CrossRefGoogle ScholarPubMed
Langdon, T.G.: Twenty-five years of ultrafine-grained materials: Achieving exceptional properties through grain refinement. Acta Mater. 61, 7035–7059 (2013).CrossRefGoogle Scholar
Valiev, R.Z. and Langdon, T.G.: Principles of equal-channel angular pressing as a processing tool for grain refinement. Prog. Mater. Sci. 51, 881–981 (2006).CrossRefGoogle Scholar
Zhu, Y.T. and Lowe, T.C.: Observations and issues on mechanisms of grain refinement during ECAP process. Mater. Sci. Eng., A 291, 46–53 (2000).CrossRefGoogle Scholar
Biswas, S. and Suwas, S.: Evolution of sub-micron grain size and weak texture in magnesium alloy Mg–3Al–0.4Mn by a modified multi-axial forging process. Scr. Mater. 66, 89–92 (2012).CrossRefGoogle Scholar
Kumar, P., Gurao, N.P., Haldar, A., and Suwas, S.: Texture and microstructural evolution in pearlitic steel during triaxial compression. Metall. Mater. Trans. A 43, 2043–2055 (2012).CrossRefGoogle Scholar
Pippan, R., Scheriau, S., Taylor, A., Hatok, M., Hohenwarter, A., and Bachmaier, A.: Saturation of fragmentation during severe plastic deformation. Annu. Rev. Mater. Res. 40, 319–343 (2010).CrossRefGoogle Scholar
Hohenwarter, A., Bachmaier, A., Gludovatz, B., Scheriau, S., and Pippan, R.: Technical parameters affecting grain refinement by high pressure torsion. Int. J. Mater. Res. 100, 1653–1661 (2009).CrossRefGoogle Scholar
Wetscher, F. and Pippan, R.: Cyclic high pressure torsion of nickel and Armco iron. Philos. Mag. 86, 5867–5883 (2006).CrossRefGoogle Scholar
Kawasaki, M. and Langdon, T.G.: The significance of strain reversals during processing by high pressure torsion. Mater. Sci. Eng., A 498, 341–348 (2008).CrossRefGoogle Scholar
Zhang, J., Starnik, M.J., Gao, N., and Zhou, W.: Effect of Mg addition on strengthening of aluminium alloys subjected to different strain paths in high pressure torsion. Mater. Sci. Eng., A 528, 2093–2099 (2011).CrossRefGoogle Scholar
Zhang, J., Gao, N., and Starnik, M.J.: Microstructure development and hardening during high pressure torsion of commercially pure aluminium: Strain reversal experiments and a dislocation based model. Mater. Sci. Eng. A528, 2581–2591 (2011).CrossRefGoogle Scholar
Wetscher, F. and Pippan, R.: Hardening and softening behaviour of cyclic high pressure torsion. Metall. Mater. Trans. A 40, 3258–3263 (2009).CrossRefGoogle Scholar
Kawasaki, M., Ahn, B., and Langdon, T.G.: Significance of strain reversals in a two-phase alloy processed by high pressure torsion. Mater. Sci. Eng. A527, 7008–7016 (2010).CrossRefGoogle Scholar
Ma, X., Li, F., Mao, X., Yuan, S., and Wang, J.: Effect of strain reversal on microstructure and mechanical properties of Ti–6Al–4V alloy under cyclic torsion deformation. Procedia Eng. 201, 1469–1474 (2017).CrossRefGoogle Scholar
Sharma, A.S., Yadav, S., Biswas, K., and Basu, B.: High-entropy alloys and metallic nanocomposites: Processing challenges, microstructure development and property enhancement. Mater. Sci. Eng., R 131, 1–42 (2018).CrossRefGoogle Scholar
Ma, D., Grabowski, B., Körmann, F., Neugebauer, J., and Raabe, D.: Ab initio thermodynamics of the CoCrFeMnNi high entropy alloy: Importance of entropy contributions beyond the configurational one. Acta Mater. 100, 90–97 (2015).CrossRefGoogle Scholar
Gao, M.C., Yeh, J.W., Liaw, P.K., and Zhang, Y.: High-Entropy Alloys: Fundamentals and Applications (Springer, Basel, Switzerland, 2015).Google Scholar
Miracle, D.B. and Senkov, O.N.: A critical review of high entropy alloys and related concepts. Acta Mater. 122, 448–511 (2017).CrossRefGoogle Scholar
Mridha, S., Samal, S., Khan, P.Y., and Biswas, K.: Processing and consolidation of nanocrystalline Cu–Zn–Ti–Fe–Cr high-entropy alloys via mechanical alloying. Metall. Mater. Trans. A 44, 4532–4541 (2013).CrossRefGoogle Scholar
Mohanty, S., Maity, T.N., Mukhopadhyay, S., Sarkar, S., Gurao, N.P., Bhowmick, S., and Biswas, K.: Powder metallurgical processing of equiatomic AlCoCrFeNi high entropy alloy: Microstructure and mechanical properties. Mater. Sci. Eng., A 679, 299–313 (2017).CrossRefGoogle Scholar
Mohanty, S., Gurao, N.P., and Biswas, K.: Sinter ageing of equiatomic Al20Co20Cu20Zn20Ni20 high entropy alloy via mechanical alloying. Mater. Sci. Eng., A 617, 211–218 (2014).CrossRefGoogle Scholar
Mishra, A.K., Samal, S., and Biswas, K.: Solidification behaviour of Ti-Cu-Fe-Co-Ni high entropy alloys. Trans. Indian Inst. Met. 65, 725–730 (2012).CrossRefGoogle Scholar
Samal, S., Mohanty, S., Mishra, A.K., Biswas, K., Govind, R.: Mechanical behaviour of novel suction-cast Ti-Cu-Fe-Co-Ni high entropy alloys. Mater. Sci. Forum 790, 503–508 (2014).CrossRefGoogle Scholar
Mishra, R.S., Kumar, N., and Komarasamy, M.: Lattice strain framework for plastic deformation in complex concentrated alloys including high entropy alloys. Mater. Sci. Technol. 31, 1259–1263 (2015).CrossRefGoogle Scholar
Komarasamy, M., Kumar, N., Mishra, R.S., and Liaw, P.K.: Anomalies in the deformation mechanism and kinetics of coarse-grained high entropy alloy. Mater. Sci. Eng., A 654, 256–263 (2016).CrossRefGoogle Scholar
Schuh, B., Mendez-Martin, F., Völker, B., George, E.P., Clemens, H., Pippan, R., and Hohenwarter, A.: Mechanical properties, microstructure and thermal stability of a nanocrystalline CoCrFeMnNi high-entropy alloy after severe plastic deformation. Acta Mater. 96, 258–268 (2015).CrossRefGoogle Scholar
Yuan, H., Tsai, M-H., Sha, G., Liu, F., Horita, Z., Zhu, Y., and Wang, J.T.: Atomic-scale homogenization in a fcc-based high-entropy alloy via severe plastic deformation. J. Alloys Compd. 686, 15–23 (2016).CrossRefGoogle Scholar
Tang, Q.H., Huang, Y., Huang, Y.Y., Liao, X.Z., Langdon, T.G., and Dai, P.Q.: Hardening of an Al0.3CoCrFeNi high entropy alloy via high pressure torsion and thermal annealing. Mater. Lett. 151, 126–129 (2015).CrossRefGoogle Scholar
Yu, P.F., Cheng, H., Zhang, L.J., Zhang, H., Jing, Q., Ma, M.Z., Liaw, P.K., Li, G., and Liu, R.P.: Effect of high pressure torsion on microstructures and properties of an Al0.1CoCrFeNi high-entropy alloy. Mater. Sci. Eng., A 655, 283–291 (2016).CrossRefGoogle Scholar
Shahmir, H., Nili-Ahmadabadi, M., Shaifee, A., Andrzejczuk, M., and Langdon, L.G.: Effect of Ti on phase stability and strengthening mechanisms of a nanocrystalline CoCrFeMnNi high-entropy alloy. Mater. Sci. Eng. A725, 196–206 (2018).CrossRefGoogle Scholar
Moon, J., Qi, Y., Tabachnikova, E., Estrin, Y., Choi, W-M., Joo, S-H., Lee, B-J., Podolskiy, A., Tikhonovsky, M., and Kim, H.S.: Microstructure and mechanical properties of high entropy alloy Co20Cr26Fe20Mn20Ni14 processed by high pressure torsion at 77 K and 300 K. Sci. Rep. 8, 11074 (2018).CrossRefGoogle ScholarPubMed
Maity, T., Prashanth, K.G., Balci, O., Kim, J.T., Schoberl, T., Wang, Z., and Eckert, J.: Influence of severe straining and strain rate on the evolution of dislocation substructures during micro-nano indentation in high entropy lamellar eutectics. Int. J. Plast. 109, 121–136 (2018).CrossRefGoogle Scholar
Tazuddin, , Biswas, K., and Gurao, N.P.: Deciphering micro-mechanisms of plastic deformation in a novel single phase fcc based MnFeCoNiCu high entropy alloy using crystallographic texture. Mater. Sci. Eng., A 657, 224–233 (2016).CrossRefGoogle Scholar
Tazuddin, , Gurao, N.P., and Biswas, K.: In the quest of single phase multi-component multiprincipal high entropy alloy. J. Alloys Compd. 697, 434–442 (2017).CrossRefGoogle Scholar
Sonkusare, R., Divya-Janini, P., Gurao, N.P., Sarkar, S., Sen, S., Pradeep, K.G., and Biswas, K.: Phase equilibria in equiatomic CoCuFeMnNi high entropy alloy. Mater. Chem. Phys. 210, 269–278 (2018).CrossRefGoogle Scholar
Agarwal, R., Sonkusare, R., Jha, S.R., Gurao, N.P., Biswas, K., and Nayan, N.: Understanding the deformation behaviour of CoCuFeMnNi high entropy alloy by investigating mechanical properties of binary, ternary and quaternary alloy subsets. Mater. Des. 157, 539–550 (2018).CrossRefGoogle Scholar
Zhong, Y., Yin, F., Sakaguchi, T., Nagai, K., and Yang, K.: Dislocation structure evolution and characterization in the compression deformed Mn–Cu alloy. Acta Mater. 55 2747–2756 (2007).CrossRefGoogle Scholar
Suwas, S. and Gurao, N.P.: Development of microstructures and textures by cross rolling. In Comprehensive Materials Processing, Vol. 3, Hashmi, M. S. J., editor-in-chief (Elsevier Ltd., Amsterdam, 2014); pp. 81–106.CrossRefGoogle Scholar
Gurao, N.P., Sethuraman, S., and Suwas, S.: Effect of strain path change on the evolution of texture and microstructure during rolling of copper and nickel. Mater. Sci. Eng. A528, 7739–7750 (2011).CrossRefGoogle Scholar
Ungar, T., Toth, L.S., Illy, J., and Kovacs, L.: Dislocation structure and work hardening in polycrystalline OFHC copper rods deformed by torsion and tension. Acta Metall. 34, 1257–1267 (1986).CrossRefGoogle Scholar
Correa, E.C.S., Aguilar, M.T.P., and Cetlin, P.R.: The effect of tension/torsion strain path changes on the work hardening of Cu–Zn brass. J. Mater. Process. Technol. 124, 384–388 (2002).CrossRefGoogle Scholar
Wilson, D.V. and Bate, P.S.: Influence of cell walls and grain boundaries on transient responses of an IF steel to changes in strain path. Acta Metall. Mater. 42, 1099–1111 (1994).CrossRefGoogle Scholar
Canova, G.R., Kocks, U.F., and Jonas, J.J.: Theory of torsion texture development. Acta Metall. 32, 211–226 (1984).CrossRefGoogle Scholar
Hallberg, H., Wallin, M., and Ristinmaa, M.: Modeling of continuous dynamic recrystallization in commercial-purity aluminium. Mater. Sci. Eng. A572, 1126–1134 (2010).CrossRefGoogle Scholar
Bacca, M., Hayhurst, D.R., and McMeeking, R.M.: Continuous dynamic recrystallization during severe plastic deformation. Mech. Mater. 90, 148–156 (2015).CrossRefGoogle Scholar
Renk, O., Hohenwarter, A., Wurster, S., and Pippan, R.: Direct evidence for grain boundary motion as the dominant restoration mechanism in the steady-state regime of extremely cold-rolled copper. Acta Mater. 77, 401–410 (2014).CrossRefGoogle ScholarPubMed
Yu, T., Hansen, N., Huang, X., and Godfrey, A.: Observation of a new mechanism balancing hardening and softening in metals. Mater. Res. Lett. 2, 160–165 (2014).CrossRefGoogle Scholar
Kapp, M.W., Renk, O., Leitner, T., Ghosh, P., Yang, B., and Pippan, R.: Cyclically induced grain growth within shear bands investigated in UFG Ni by cyclic high pressure torsion. J. Mater. Res. 32, 4317–4326 (2017).CrossRefGoogle Scholar
Hughes, D.A., Charzan, D.C., Liu, Q., and Hansen, N.: Scaling of misorientation angle distributions. Phys. Rev. Lett. 81, 4664–4667 (1998).CrossRefGoogle Scholar
Field, D.P., Trivedi, P.B., and Wright, S.I.: Analysis of local orientation gradients in deformed single crystals. Ultramicroscopy 103, 33–39 (2005).CrossRefGoogle ScholarPubMed