Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-28T02:21:35.079Z Has data issue: false hasContentIssue false
  • English
  • Français

Phase stability as a function of temperature in a refractory high-entropy alloy

Published online by Cambridge University Press:  17 July 2018

Vishal Soni ,
Bharat Gwalani ,
Oleg N. Senkov ,
Babu Viswanathan ,
Talukder Alam ,
Daniel B. Miracle  and
Rajarshi Banerjee
Vishal Soni
Affiliation:
Advanced Materials and Manufacturing Processes Institute, University of North Texas, Denton, Texas 76207, USA; and Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76207, USA
Bharat Gwalani
Affiliation:
Advanced Materials and Manufacturing Processes Institute, University of North Texas, Denton, Texas 76207, USA; and Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76207, USA
Oleg N. Senkov
Affiliation:
Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, USA; and Materials and Processes Division, UES Inc., Beavercreek, Ohio 45432, USA
Babu Viswanathan
Affiliation:
Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, USA; and Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 4310, USA
Talukder Alam
Affiliation:
Advanced Materials and Manufacturing Processes Institute, University of North Texas, Denton, Texas 76207, USA; and Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76207, USA
Daniel B. Miracle
Affiliation:
Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, USA
Rajarshi Banerjee*
Affiliation:
Advanced Materials and Manufacturing Processes Institute, University of North Texas, Denton, Texas 76207, USA; and Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76207, USA
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

Refractory high-entropy alloys (RHEAs) have recently attracted much attention, primarily due to their mechanical properties at elevated temperatures. However, the equilibrium phase-stability of these alloy systems is not well established. The present investigation focuses on the phase stability of Al0.5NbTa0.8Ti1.5V0.2Zr RHEA at temperatures ranging from 600 to 1200 °C. The detailed phase characterization involves coupling of scanning electron microscopy, transmission electron microscopy, and atom probe tomography. The stable phases present at these temperatures are (i) 1200 °C—body-centered cubic (BCC) matrix with nano-B2 precipitates; (ii) 1000 °C and 800 °C—a BCC matrix phase with Al–Zr rich hexagonal closed packed intermetallic precipitates and, (iii) 600 °C—a BCC + B2 microstructure, comprising a continuous BCC matrix with discrete B2 precipitates. These results highlight the substantial changes in phase stability as a function of temperature in RHEAs, and high-entropy alloys in general, and also the importance of accounting for these changes especially while designing alloys for high temperature applications.

Keywords

alloyannealingmicrostructurephase equilibria
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 19: Focus Issue: Fundamental Understanding and Applications of High-Entropy Alloys , 14 October 2018 , pp. 3235 - 3246
Copyright
Copyright © Materials Research Society 2018 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

b)

These authors contributed equally to this work.

c)

This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/editor-manuscripts/.

References

REFERENCES

Yeh, J.W., Chen, S.K., Lin, S.J., Gan, J.Y., Chin, T.S., Shun, T.T., Tsau, C.H., and Chang, S.Y.: Nanostructured high-entropy alloys with multiple principal elements: Novel alloy design concepts and outcomes. Adv. Eng. Mater. 6, 5 (2004).CrossRefGoogle Scholar
Jien-Wei, Y.: Recent progress in high entropy alloys. Ann. Chimie Sci. Matériaux 31, 633 (2006).Google Scholar
Miracle, D.B. and Senkov, O.N.: A critical review of high entropy alloys and related concepts. Acta Mater. 122, 448 (2017).CrossRefGoogle Scholar
Cantor, B., Chang, I.T.H., Knight, P., and Vincent, A.J.B.: Microstructural development in equiatomic multicomponent alloys. Mater. Sci. Eng., A 375, 231 (2004).Google Scholar
Ranganathan, S.: Alloyed pleasures: Multimetallic cocktails. Curr. Sci. 85, 1404 (2003).Google Scholar
Borkar, T., Gwalani, B., Choudhuri, D., Mikler, C.V., Yannetta, C.J., Chen, X., Ramanujan, R.V., Styles, M.J., Gibson, M.A., and Banerjee, R.: A combinatorial assessment of AlxCrCuFeNi2 (0 < x < 1.5) complex concentrated alloys: Microstructure, microhardness, and magnetic properties. Acta Mater. 116, 63 (2016).CrossRefGoogle Scholar
Diao, H.Y., Feng, R., Dahmen, K.A., and Liaw, P.K.: Fundamental deformation behavior in high-entropy alloys: An overview. Curr. Opin. Solid State Mater. Sci. 21, 252 (2017).CrossRefGoogle Scholar
Senkov, O.N., Scott, J.M., Senkova, S.V., Miracle, D.B., and Woodward, C.F.: Microstructure and room temperature properties of a high-entropy TaNbHfZrTi alloy. J. Alloys Compd. 509, 6043 (2011).CrossRefGoogle Scholar
Senkov, O.N., Wilks, G.B., Miracle, D.B., Chuang, C.P., and Liaw, P.K.: Refractory high-entropy alloys. Intermetallics 18, 1758 (2010).CrossRefGoogle Scholar
Senkov, O.N., Wilks, G.B., Scott, J.M., and Miracle, D.B.: Mechanical properties of Nb25Mo25Ta25W25 and V20Nb20Mo20Ta20W20 refractory high entropy alloys. Intermetallics 19, 698 (2011).CrossRefGoogle Scholar
Senkov, O.N. and Woodward, C.F.: Microstructure and properties of a refractory NbCrMo0.5Ta0.5TiZr alloy. Mater. Sci. Eng., A 529, 311 (2011).CrossRefGoogle Scholar
Feuerbacher, M., Lienig, T., and Thomas, C.: A single-phase bcc high-entropy alloy in the refractory Zr–Nb–Ti–V–Hf system. Scr. Mater. 152, 40 (2018).CrossRefGoogle Scholar
Senkov, O.N., Senkova, S.V., Woodward, C., and Miracle, D.B.: Low-density, refractory multi-principal element alloys of the Cr–Nb–Ti–V–Zr system: Microstructure and phase analysis. Acta Mater. 61, 1545 (2013).CrossRefGoogle Scholar
Senkov, O.N., Senkova, S.V., Miracle, D.B., and Woodward, C.: Mechanical properties of low-density, refractory multi-principal element alloys of the Cr–Nb–Ti–V–Zr system. Mater. Sci. Eng., A 565, 51 (2013).CrossRefGoogle Scholar
Senkov, O.N., Woodward, C., and Miracle, D.B.: Microstructure and properties of aluminum-containing refractory high-entropy alloys. JOM 66, 2030 (2014).CrossRefGoogle Scholar
Senkov, O.N., Senkova, S.V., and Woodward, C.: Effect of aluminum on the microstructure and properties of two refractory high-entropy alloys. Acta Mater. 68, 214 (2014).CrossRefGoogle Scholar
Senkov, O.N., Jensen, J.K., Pilchak, A.L., Miracle, D.B., and Fraser, H.L.: Compositional variation effects on the microstructure and properties of a refractory high-entropy superalloy AlMo0.5NbTa0.5TiZr. Mater. Des. 139, 498 (2018).CrossRefGoogle Scholar
Stepanov, N.D., Shaysultanov, D.G., Salishchev, G.A., and Tikhonovsky, M.A.: Structure and mechanical properties of a light-weight AlNbTiV high entropy alloy. Mater. Lett. 142, 153 (2015).CrossRefGoogle Scholar
Stepanov, N.D., Yurchenko, N.Y., Sokolovsky, V.S., Tikhonovsky, M.A., and Salishchev, G.A.: An AlNbTiVZr0.5 high-entropy alloy combining high specific strength and good ductility. Mater. Lett. 161, 136–139 (2015).CrossRefGoogle Scholar
Gorsse, S., Miracle, D.B., and Senkov, O.N.: Mapping the world of complex concentrated alloys. Acta Mater. 135, 177–187 (2017).CrossRefGoogle Scholar
Senkov, O.N., Isheim, D., Seidman, D.N., and Pilchak, A.L.: Development of a Refractory High Entropy Superalloy (Postprint), AFRL Materials and Manufacturing Directorate Wright Patterson Air Force Base United States, 2016.Google Scholar
Duhl, D.N., Tien, J.K., and Caulfield, T.: Superalloys, Supercomposites and Superceramics (AcademicPress, New York, 1989).Google Scholar
Han, Z.D., Chen, N., Zhao, S.F., Fan, L.W., Yang, G.N., Shao, Y., and Yao, K.F.: Effect of Ti additions on mechanical properties of NbMoTaW and VNbMoTaW refractory high entropy alloys. Intermetallics 84, 153–157 (2017).CrossRefGoogle Scholar
Han, Z.D., Luan, H.W., Liu, X., Chen, N., Li, X.Y., Shao, Y., and Yao, K.F.: Microstructures and mechanical properties of TixNbMoTaW refractory high-entropy alloys. Mater. Sci. Eng., A 712, 380–385 (2018).CrossRefGoogle Scholar
Wang, S.P. and Xu, J.: (TiZrNbTa)–Mo high-entropy alloys: Dependence of microstructure and mechanical properties on Mo concentration and modeling of solid solution strengthening. Intermetallics 95, 59–72 (2018).CrossRefGoogle Scholar
Gwalani, B., Soni, V., Lee, M., Mantri, S.A., Ren, Y., and Banerjee, R.: Optimizing the coupled effects of Hall–Petch and precipitation strengthening in Al0.3CoCrFeNi high entropy alloy. Mater. Des. 121, 254–260 (2017).CrossRefGoogle Scholar
Gwalani, B., Soni, V., Choudhuri, D., Lee, M., Hwang, J.Y., Nam, S.J., Ryu, H., Hong, S.H., and Banerjee, R.: Stability of ordered L12 and B2 precipitates in face centered cubic based high entropy alloys-Al0.3CoFeCrNi and Al0.3CuFeCrNi2. Scr. Mater. 123, 130 (2016).CrossRefGoogle Scholar
Choudhuri, D., Gwalani, B., Gorsse, S., Mikler, C.V., Ramanujan, R.V., Gibson, M.A., and Banerjee, R.: Change in the primary solidification phase from fcc to bcc-based B2 in high entropy or complex concentrated alloys. Scr. Mater. 127, 186 (2017).CrossRefGoogle Scholar
Yao, J.Q., Liu, X.W., Gao, N., Jiang, Q.H., Li, N., Liu, G., Zhang, W.B., and Fan, Z.T.: Phase stability of a ductile single-phase BCC Hf0.5Nb0.5Ta0.5Ti1.5Zr refractory high-entropy alloy. Intermetallics 98, 79 (2018).CrossRefGoogle Scholar
Stepanov, N.D., Yurchenko, N.Y., Zherebtsov, S.V., Tikhonovsky, M.A., and Salishchev, G.A.: Aging behavior of the HfNbTaTiZr high entropy alloy. Mater. Lett. 211, 87 (2018).CrossRefGoogle Scholar
Wu, Y., Si, J., Lin, D., Wang, T., Wang, W.Y., Wang, Y., Liu, Z., and Hui, X.: Phase stability and mechanical properties of AlHfNbTiZr high-entropy alloys. Mater. Sci. Eng., A 724, 249 (2018).CrossRefGoogle Scholar
Jensen, J.K.: Characterization of a high strength, refractory high entropy alloy, AlMo0.5NbTa0.5TiZr. Ph. D. dissertation, The Ohio State University, Columbus, Ohio, 2017.Google Scholar
Hellman, O.C., Vandenbroucke, J.A., Rüsing, J., Isheim, D., and Seidman, D.N.: Analysis of three-dimensional atom-probe data by the proximity histogram. Microsc. Microanal. 6, 437 (2000).Google ScholarPubMed
Caron, P. and Khan, T.: Improvement of creep strength in a nickel-base single-crystal superalloy by heat treatment. Mater. Sci. Eng. 61, 173 (1983).CrossRefGoogle Scholar
Soffa, W.A. and Laughlin, D.E.: Decomposition and ordering processes involving thermodynamically first-order order → disorder transformations. Acta Metall. 37, 3019 (1989).CrossRefGoogle Scholar
Bendersky, L.A., Boettinger, W.J., Burton, B.P., Biancaniello, F.S., and Shoemaker, C.B.: The formation of ordered ω-related phases in alloys of composition Ti4Al3Nb. Acta Metall. Mater. 38, 931 (1990).CrossRefGoogle Scholar
Hickman, B.S.: The formation of omega phase in titanium and zirconium alloys: A review. J. Mater. Sci. 4, 554 (1969).CrossRefGoogle Scholar
Ng, H.P., Devaraj, A., Nag, S., Bettles, C.J., Gibson, M., Fraser, H.L., Muddle, B.C., and Banerjee, R.: Phase separation and formation of omega phase in the beta matrix of a Ti–V–Cu alloy. Acta Mater. 59, 2981 (2011).CrossRefGoogle Scholar
De Fontaine, D., Paton, N.E., and Williams, J.C.: The omega phase transformation in titanium alloys as an example of displacement controlled reactions. Acta Metall. 19, 1153 (1971).CrossRefGoogle Scholar
Supplementary material: File

Soni et al. supplementary material

Soni et al. supplementary material 1

Download Soni et al. supplementary material(File)
File 892.9 KB