Abstract
The effects of Ti addtions and the heat treatment on the mechanical properties of AlCoCrFeNiTi x (x = 0, 0.2, 0.3, 0.4 and 0.5) high-entropy alloys (HEAs) were studied. The results show that the dendrite phase with a body-centered-cubic (bcc) structure transforms into the interdendrite phase with a new bcc structure. With the increase of the Ti contents and heat-treatment temperature, the average hardness and yield strengths are greatly improved, and the highest hardness and yielding strength are 583 HV and 2.07 GPa, respectively in the investigated HEA system. The as-cast and annealed HEAs exhibit excellent mechanical properties, combining with high yielding strength and plasticity. The solid solution strengthening mechanism of Ti additions is responsible for the strengthening effect of AlCoCrFeNiTi x HEAs.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
J.W. Yeh, S.K. Chen, S.J. Lin, J.Y. Gan, T.S. Chin, T.T. Shun, C.H. Tsau and S.Y. Chang, Adv. Eng. Mater. 6 (2004) 299.
J.M. Zhu, H.F. Zhang, H.M. Fu, A.M. Wang, H. Li and Z.Q. Hu, J. Alloys Compd. 497 (2010) 52.
K.B. Zhang, Z.Y. Fu, J.Y. Zhang, W.M. Wang, H. Wang, Y.C. Wang, Q.J. Zhang and J. Shi, Mater. Sci. Eng. A 508 (2009) 214.
Y. Zhang, S.G. Ma and J.W. Qiao, Metall. Mater. Trans. A 43 (2012) 2625.
Y.J. Zhou, Y. Zhang, Y.L. Wang and G.L. Chen, Mater. Sci. Eng. A 454-455 (2007) 260.
Y.P. Wang, B.S. Li, M.X. Ren, C. Yang and H.Z. Fu, Mater. Sci. Eng. A 491 (2008) 154.
T.T. Shun and Y.C. Du, J. Alloys Compd. 479 (2009) 157.
J.M. Zhu, H.M. Fu, H.F. Zhang, A.M. Wang, H. Li and Z.Q. Hu, Mater. Sci. Eng. A 527 (2010) 7210.
J.W. Qiao, S.G. Ma, E.W. Huang, C.P. Chuang, P.K. Liaw and Y. Zhang, Mater. Sci. Forum. 688 (2011) 419.
Y.J. Zhou, Y. Zhang, Y.L. Wang and G.L. Chen, Appl. Phys. Lett. 90 (2007) 181904.
C.M. Lin, H.L. Tsai and H.Y. Bor, Intermetallics 18 (2010) 1244.
S. Ranganathan, Curr. Sci. 8 (2003) 1404.
C.J. Tong, Y.L. Chen, S.K. Chen, J.W. Yeh, T.T. Shun, C.H. Tsau, S.J. Lin and S.Y. Chang, Metall. Mater. Trans. A 36 (2005) 881.
A. Takeuchi and A. Inoue, Mater. Trans. 46 (2005) 2817.
F.R. Doer, R. Boom, W.C.M. Mattens, A.R. Miedema and A.K. Niessen, Cohesion in Metals, 2nd ed., North-Holland Physics Publishing, Netherlands, 1988.
C.M. Lin and H.L. Tsai, Intermetallics 19 (2011) 288.
W.R. Wang, W.L. Wang, S.C. Wang, Y.C. Tsai, C.H. Lai and J.W. Yeh, Intermetallics 26 (2012) 44.
Y. Zhang, Y.J. Zhou, J.P. Lin, G.L. Chen and P.K. Liaw, Adv. Eng. Mater. 10 (2008) 534.
S.S. Fang, X.S. Xiao, L. Xia, W.H. Li and Y.D. Dong, J. Non-Cryst. Solids 321 (2003) 120.
C. Kittel, Int. to Solid State Phys. 6th ed, John Wiley & Songs. Inc, New York, 1980, p.26.
O.E. Sebaie, A.M. Samuel, F.H. Samuel and H.W. Doty, Mater. Sci. Eng. A 486 (2008) 241.
C. Ng, S. Guo, J.H. Luan, S.Q. Shi and C.T. Liu, Intermetallics, 31 (2012) 165.
J. Rösler, H. Harders and M. Bäker, Mechanical Behaviour of Engineering Materials, Springer Berlin Heidelberg, New York, 2007.
A. Inoue, Mater. Sci. Eng. A 304–306 (2001) 1.
J.W. Qiao, S. Wang, Y. Zhang, P.K. Liaw and G.L. Chen, Appl. Phys. Lett. 94 (2009) 151905.
Y. Zhang, X. Yang and P.K. Liaw, JOM 64 (2012) 830.
C.Y. Hsu, C.C. Juan, W.R. Wang, T.S. Sheu, J.W. Yeh and S.K. Chen, Mater. Sci. Eng. A 528 (2011) 3581.
J.W. Qiao, Y. Zhang and P.K. Liaw, Adv. Eng. Mater. 10 (2008) 1039.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wang, Y., Ma, S., Chen, X. et al. Optimizing mechanical properties of AlCoCrFeNiTi x high-entropy alloys by tailoring microstructures. ACTA METALL SIN 26, 277–284 (2013). https://doi.org/10.1007/s40195-012-0174-5
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s40195-012-0174-5