Study of structure and mechanical properties of cu-femn-ni multicomponent alloys with al and si additions in the as-cast and splat-quenched state

V. F. Bashev, O. I. Kushnerov

Abstract


Abstract. Purpose. This work is dedicated to establishing the effects of the composition and the melt cooling rate on microhardness, phase composition and parameters of the fine structure of multicomponent high-entropy alloys (HEA) of Cu-Fe-MnNi system with Al and Si additions in the as-cast and splat-quenched state. Methodology. As-cast alloy samples were obtained by a laboratory Tamman furnace using a copper mold (cooling rate ~ 102 K/s). Quenching from a liquid state was carried out by a known technique of splat-quenching (SQ). Cooling rate estimated by foil thickness was ~ 106 K/s. The X-ray diffraction analysis was carried out with the use of the DRON-2.0 diffractometer.  Microhardness was measured on the PMT-3 microhardnessmeter. Selection of components of the studied HEAs was carried out on the basis of the criteria adopted in the literature for the HEA composition based on a calculation of the entropy and enthalpy of mixing, valence electron concentrations as well as the difference between the atomic radii of the components. Findings. Simple solid solutions with a face-centered cubic structure are obtained in all of the splatquenched alloys. The as-cast alloys also have a simple face-centered cubic structure, with the exception of CuFeMnNiSi0.5, in which the intermetallic phases are found. The values of lattice parameters of the investigated alloys indicate that solid solutions are formed on the base of the γ-Fe lattice, taking into account its higher melting temperature. The positive influence of microstrains level and dislocation density on the microhardness values of alloys are established. The obtained results clearly indicate also a strong dependence between the measured microhardness and content of Si and Al, thus improved mechanical characteristics are obviously ensured by the strong distortion of the crystal lattice due to the differences in atomic radii of elements. Originality. At present work were first obtained and studied HEAs of Al-Cu-Fe-Mn-Ni-Si system in the as-cast and splat-quenched state. These compositions are free of Co and Cr, which are usually used in HEA and favor an increase in their operating characteristics but substantially increase the alloy cost. Practical value. The HEAs possess many attractive properties, such as high hardness, outstanding wear resistance, irradiation resistance, excellent high-temperature strength, good thermal stability, biocompatibility and corrosion resistance.

Keywords


high-entropy alloy; splat-quenching; phase composition; structure; microhardness

Full Text:

PDF

References


Bashev V. F. and Kushnerov O.I. Structure and properties of cast and splat-quenched high-entropy Al–Cu–Fe–Ni–Si alloys// The Physics of Metals and Metallography. –2017, –V. 118, No. 1,–P. 39–47.

Bashev V. F. and Kushnerov O.I. Structure and properties of high entropy CoCrCuFeNiSnx alloys // The Physics of Metals and Metallography. –2014, –V. 115, No. 7,–P. 692–696.

Firstov G.S., Kosorukova T.A., Koval Y.N. and Odnosum V.V. High entropy shape memory alloys // Materials Today: Proceedings. – 2015. – V. 2. – P. S499–S503.

Gao M. C., Carney C.S., Doğan Ö. N., Jablonksi P. D., Hawk J. A. and Alman D. E. Design of refractory high-entropy alloys// JOM. – 2015. – V. 67, No. 11. –Р. 2653-2669.

Gao M. C., Yeh J.-W., Liaw P. K. and Zhang Y. High-entropy alloys. Fundamentals and Applications.– Springer International Publishing, 2016. – 516 p.

Guo S. and Liu C.T. Phase stability in high entropy alloys: Formation of solid-solution phase or amorphous phase// Progress in Natural Science: Materials International.–2011.–V. 21, Iss. 6, –P. 433–446.

Li W.K., Zhou G.D. and Mak T.C.W. Advanced Structural Inorganic Chemistry. –New York: Oxford University Press, 2008. – 688 p.

Nadutov V.M., Makarenko S. Yu. and Volosevich P. Yu. Study of structure and distribution of chemical elements in cast highentropy alloys of AlxFeNiCoCuCr system // Metallofiz. Noveishie Tekhnol. – 2014. – V. 36, No. 10. – P. 1327–1341.

Qi T., Li Y., Takeuchi A., Xie G. and Miao H. Soft magnetic Fe25Co25Ni25(B,Si )25 high entropy bulk metallic glasses // Intermetallics. – 2015. –V. 66. – P. 8–12.

Ruhl R.C. and Cohen M. Splat quenching of iron-carbon alloys// Trans Met Soc AIME. -1969. -V. 245, № 2. -P. 241–251.

Takeuchi A. and Inoue A. Classification of bulk metallic glasses by atomic size difference, heat of mixing and period of constituent elements and its application to characterization of the main alloying element// Materials Transactions.–2005. –V. 46 – P. 2817-2829.

Veronesi P., Colombini E., Rosa R., Leonelli C. and Rosi F. Microwave assisted synthesis of Si-modified Mn25FexNi25Cu(50−x) high entropy alloys // Materials Letters. – 2016. – V. 162. – P. 277–280.

Wang Z., Wang Z., Huang Y, Yang Y., Wang J., and Liu C.T. Atomic-size effect and solid solubility of multicomponent alloys // Scripta Materialia. – 2015. – V. 94. – P. 28–31. Стаття рекомендована до публікації д.т.н., наук, проф. Лаухіним Д.В., д.т.н., проф. Сухомлиним Г.Д. (Україна)


GOST Style Citations


1. Bashev V. F. and Kushnerov O.I. Structure and properties of cast and splat-quenched high-entropy Al–Cu–Fe–Ni–Si alloys// The Physics of Metals and Metallography. –2017, –V. 118, No. 1,–P. 39–47.

2. Bashev V. F. and Kushnerov O.I. Structure and properties of high entropy CoCrCuFeNiSnx alloys // The Physics of Metals and Metallography. –2014, –V. 115, No. 7,–P. 692–696.

3. Firstov G.S., Kosorukova T.A., Koval Y.N. and Odnosum V.V. High entropy shape memory alloys // Materials Today: Proceedings. – 2015. – V. 2. – P. S499–S503.

4. Gao M. C., Carney C.S., Doğan Ö. N., Jablonksi P. D., Hawk J. A. and Alman D. E. Design of refractory high-entropy alloys// JOM. – 2015. – V. 67, No. 11. –Р. 2653-2669.

5. Gao M. C., Yeh J.-W., Liaw P. K. and Zhang Y. High-entropy alloys. Fundamentals and Applications.– Springer International Publishing, 2016. – 516 p.

6. Guo S. and Liu C.T. Phase stability in high entropy alloys: Formation of solid-solution phase or amorphous phase// Progress in Natural Science: Materials International.–2011.–V. 21, Iss. 6, –P. 433–446.

7. Li W.K., Zhou G.D. and Mak T.C.W. Advanced Structural Inorganic Chemistry. –New York: Oxford University Press, 2008. – 688 p.

8. Nadutov V.M., Makarenko S. Yu. and Volosevich P. Yu. Study of structure and distribution of chemical elements in cast highentropy alloys of AlxFeNiCoCuCr system // Metallofiz. Noveishie Tekhnol. – 2014. – V. 36, No. 10. – P. 1327–1341.

9. Qi T., Li Y., Takeuchi A., Xie G. and Miao H. Soft magnetic Fe25Co25Ni25(B,Si )25 high entropy bulk metallic glasses // Intermetallics. – 2015. –V. 66. – P. 8–12.

10. Ruhl R.C. and Cohen M. Splat quenching of iron-carbon alloys// Trans Met Soc AIME. -1969. -V. 245, № 2. -P. 241–251.

11. Takeuchi A. and Inoue A. Classification of bulk metallic glasses by atomic size difference, heat of mixing and period of constituent elements and its application to characterization of the main alloying element// Materials Transactions.–2005. –V. 46 – P. 2817-2829.

12. Veronesi P., Colombini E., Rosa R., Leonelli C. and Rosi F. Microwave assisted synthesis of Si-modified Mn25FexNi25Cu(50−x) high entropy alloys // Materials Letters. – 2016. – V. 162. – P. 277–280.

13. Wang Z., Wang Z., Huang Y, Yang Y., Wang J., and Liu C.T. Atomic-size effect and solid solubility of multicomponent alloys // Scripta Materialia. – 2015. – V. 94. – P. 28–31. Стаття рекомендована до публікації д.т.н., наук, проф. Лаухіним Д.В., д.т.н., проф. Сухомлиним Г.Д. (Україна)



Refbacks

  • There are currently no refbacks.