Temperature and Orientation Dependence of the Mechanical Properties of Al0.3CoCrFeNi High-Entropy Alloy Single Crystals Hardened by Non-Coherent β- Phase Particles
I. V. Kireeva, Yu. I. Chumlyakov, Z. V. Pobedennaya, A. V. Vyrodova, A. A. Saraeva, I. G. Bessonova, I. V. Kuksgauzen, D. A. Kuksgauzen
Российский физический журнал
https://doi.org/10.1007/s11182-020-02012-8
Aging of the Al0.3CoCrFeNi high-entropy alloy single crystals for 50 h at a temperature of 973 K leads to the precipitation of non-coherent non-equiaxed β-phase particles with B2-type ordering, average length l =250–350 nm, width d = 30–45 nm, and interparticle distance L = 500–750 nm. It is shown that the interaction of slip dislocations with β-phase particles is realized by the rounding mechanism. The β-phase particles increase critical shear stresses τcr by 30–50 MPa in the temperature range of 77–973 K compared to the quenched single crystals. The deformation of [\( \overline{1}11 \)] - and [001]-oriented single crystals in the temperature range of 77–973 K is realized by slip, and τcr are independent of the crystal orientation. It is shown that the strain hardening coefficient Θ = dσ/dε and the plasticity εpl during tensile strain in [\( \overline{1}11 \)]- and [001]-oriented single crystals, on the contrary, depend on the crystal orientation. The maximum value of Θ = dσ/dε = 3400 MPa and the minimum value of εpl = 8% are observed in [\( \overline{1}11 \)]-oriented single crystals at 77 K. Twinning in [\( \overline{1}11 \)]- oriented single crystals with the β-phase particles was not detected at tension before failure at 77 and 296 K.
- V. D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University, Tomsk, RussiaI. V. Kireeva, Yu. I. Chumlyakov, Z. V. Pobedennaya, A. V. Vyrodova, A. A. Saraeva, I. G. Bessonova, I. V. Kuksgauzen & D. A. Kuksgauzen
- Y. Zhang, T. T. Zuo, Z. Tang, et al., Prog. Mater. Sci., 61, 1–93 (2014).
- P. Wilson, R. Field, and M. Kaufman, Intermetallics, 75, 15–24 (2016).
- F. Otto, A. Dlouhy, Ch. Somsen, et al., Acta Mater., 61, 5743–5755 (2013).
- I. V. Kireeva, Yu. I. Chumlyakov, Z. V. Pobedennaya, et al., Russ. Phys. J., 59, No. 8, 1242–1250 (2016).
- I. V. Kireeva, Yu. I. Chumlyakov, Z. V. Pobedennaya, et al., Mater. Sci. Eng. A., 737, 47–60 (2018).
- B. Gwalani, V. Soni, M. Lee, et al., Mater. Des., 121, 254–260 (2017).
- J. V. He, H. Wang, H. L. Huang, et al., Acta Mater., 102, 187–196 (2016).
- Ya. D. Vishnyakov, A. A. Babaréko, S. A. Vladimirov, and I. V. Égiz, Theory of Texture Formation in Metals and Alloys [in Russian], Nauka, Moscow (1979).
- E. Nembach, Particle Strengthening of Metals and Alloys, John Wiley & Sons, Inc., New York; Chichester; Brisbane; Toronto; Singapure; Weinheim (1997).
- R. Berner and G. Kronmuller, Plastic Deformation of Single Crystals [Russian translation], Mir, Moscow (1969).
- I. V. Kireeva, Yu. I. Chumlyakov, Z. V. Pobedennaya, et al., Pis’ma Zh. Tekh. Fiz., 43, No. 13, 51–57 (2017).
- U. F. Koks, A. S. Aragon, and M. F. Ashby, Thermodynamics and Kinetics of Slip, Pergamon Press, Oxford (1975).
- G. Laplanche, P. Gadaud, O. Horst, et al., J. Alloys Compd., 623, 348–353 (2015).
- Yu. I. Chumljakov, I. V. Kireeva, E. Yu. Panchenko, et al., Russ. Phys. J., 54, No. 8, 937–950 (2011).
- I. Kireeva, Yu. Chumlyakov, Z. Pobedennaya, et al., AIP Conf. Proc., 2167, 020159 (1–4) (2019).