Effect of Aging Treatment on Microstructure and Mechanical Properties of Al0.7CoCrFeNi High Entropy Alloy

Document Type : Original Article

Authors

Faculty of Materials & Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran

Abstract

In this study, the effects of aging times and temperatures on the microstructure, hardness and compression strength of Al0.7CoCrFeNi high entropy alloy have been investigated. The alloy was cast in a vacuum induction melting furnace, homogenized at 1250 ˚C for 6 h; then aged at 700 to 1000˚C for 2-8 h. The as-cast structure is dendritic and includes FCC(A1) and BCC(A2, B2) phases with the hardness of 497 HV. During ageing, B2 precipitates at the grain boundaries at 700˚C and the hardness increases about 7%. The ratio of BCC to FCC phases on the basis of XRD in as-cast alloy is approximately equal which is increased by ageing at 700˚C. At 800˚C, the formation of a destructive and hard phase of σ cause to increases the hardness to 543 HV and the ratio of (A2+B2)/A1 has decreased. At 1000 ˚C, the ratio of (A2+ B2)/A1 increases, and the peak intensity of σ decreases, so that the hardness value decreases to 385 HV. The results of hot deformation test showed that the alloy at the strain rate of 10-3 s-1 and temperatures of 800, 900, 1000 and 1100˚C has a yield strength of 306, 179, 91 and 50 MPa, respectively. 

Keywords

Main Subjects

References

  1. Niu, P., Li, R., Yuan, T., Zhu, S., Chen, C., Wang, M. and Huang, L., "Microstructures and properties of an equimolar alcocrfeni high entropy alloy printed by selective laser melting", Intermetallics, Vol. 104, (2019), 24-32. doi: 10.1016/j.intermet.2018.10.018.
  2. Vyas, A., Menghani, J. and Natu, H., "Metallurgical and mechanical properties of laser cladded alfecucrconi-wc10 high entropy alloy coating", International Journal of Engineering, Transactions A: Basics, Vol. 33, No. 7, (2020), 1397-1402. doi: 10.5829/IJE.2020.33.07A.27.
  3. Murty, B.S., Yeh, J.-W., Ranganathan, S. and Bhattacharjee, P., "High-entropy alloys, Elsevier, (2019).
  4. Shi, Y., Collins, L., Feng, R., Zhang, C., Balke, N., Liaw, P.K. and Yang, B., "Homogenization of alxcocrfeni high-entropy alloys with improved corrosion resistance", Corrosion Science, Vol. 133, (2018), 120-131. doi: 10.1016/j.corsci.2018.01.030.
  5. Wei, L., Liu, X., Gao, Y., Peng, X., Hu, N. and Chen, M., "Phase, microstructure and mechanical properties evaluation of alcocrfeni high-entropy alloy during mechanical ball milling", Intermetallics, Vol. 138, (2021), 107310. doi: 10.1016/j.intermet.2021.107310.
  6. Zhao, C., Li, J., Liu, Y., Ma, X., Jin, Y., Wang, W.Y., Kou, H. and Wang, J., "Optimizing mechanical and magnetic properties of alcocrfeni high-entropy alloy via fcc to bcc phase transformation", Journal of Materials Science & Technology, Vol. 86, (2021), 117-126. doi: 10.1016/j.jmst.2020.12.080.
  7. Munitz, A., Salhov, S., Hayun, S. and Frage, N., "Heat treatment impacts the micro-structure and mechanical properties of alcocrfeni high entropy alloy", Journal of Alloys and Compounds, Vol. 683, (2016), 221-230. doi: 10.1016/j.jallcom.2016.05.034.
  8. Wang, R., Zhang, K., Davies, C. and Wu, X., "Evolution of microstructure, mechanical and corrosion properties of alcocrfeni high-entropy alloy prepared by direct laser fabrication", Journal of Alloys and Compounds, Vol. 694, (2017), 971-981. doi: 10.1016/j.jallcom.2016.10.138.
  9. Butler, T.M. and Weaver, M.L., "Investigation of the phase stabilities in alnicocrfe high entropy alloys", Journal of Alloys and Compounds, Vol. 691, (2017), 119-129. doi: 10.1016/j.jallcom.2016.08.121.
  10. Wang, W.-R., Wang, W.-L. and Yeh, J.-W., "Phases, microstructure and mechanical properties of alxcocrfeni high-entropy alloys at elevated temperatures", Journal of Alloys and Compounds, Vol. 589, (2014), 143-152. doi: 10.1016/j.jallcom.2013.11.084.
  11. Toocharoen, S., Kaewkuekool, S. and Peasura, P., "The rejuvenation heat treatment of nickel base superalloy grade gtd111 after long-term service via the taguchi method for optimization", International Journal of Engineering, Transactions A: Basics, Vol. 34, No. 4, (2021), 956-965. doi: 10.5829/IJE.2021.34.04A.22.
  12. Azadi, M., Iziy, M., Marbout, A. and Rizi, M., "Investigation of the heat treatment effect on microstructures and phases of inconel 713c superalloy", International Journal of Engineering, Transactions A: Basics, Vol. 30, No. 10, (2017), 1538-1544. doi: 10.5829/ije.2017.30.10a.15.
  13. Gwalani, B., Soni, V., Lee, M., Mantri, S., Ren, Y. and Banerjee, R., "Optimizing the coupled effects of hall-petch and precipitation strengthening in a al0. 3cocrfeni high entropy alloy", Materials & Design, Vol. 121, (2017), 254-260. doi: 10.1016/j.matdes.2017.02.072.
  14. Kuwabara, K., Shiratori, H., Fujieda, T., Yamanaka, K., Koizumi, Y. and Chiba, A., "Mechanical and corrosion properties of alcocrfeni high-entropy alloy fabricated with selective electron beam melting", Additive Manufacturing, Vol. 23, (2018), 264-271. doi: 10.1016/j.addma.2018.06.006.
  15. Tang, Z., Senkov, O.N., Parish, C.M., Zhang, C., Zhang, F., Santodonato, L.J., Wang, G., Zhao, G., Yang, F. and Liaw, P.K., "Tensile ductility of an alcocrfeni multi-phase high-entropy alloy through hot isostatic pressing (HIP) and homogenization", Materials Science and Engineering: A, Vol. 647, (2015), 229-240. doi: 10.1016/j.msea.2015.08.078.
  16. Zhao, C., Li, J., Liu, Y., Wang, W.Y., Kou, H., Beaugnon, E. and Wang, J., "Tailoring mechanical and magnetic properties of alcocrfeni high-entropy alloy via phase transformation", Journal of Materials Science & Technology, Vol. 73, (2021), 83-90. doi: 10.1016/j.jmst.2020.08.063.
  17. Strumza, E. and Hayun, S., "Comprehensive study of phase transitions in equiatomic alcocrfeni high-entropy alloy", Journal of Alloys and Compounds, Vol. 856, (2021), 158220. doi: 10.1016/j.jallcom.2020.158220.
  18. Vaidya, M., Trubel, S., Murty, B., Wilde, G. and Divinski, S.V., "Ni tracer diffusion in cocrfeni and cocrfemnni high entropy alloys", Journal of Alloys and Compounds, Vol. 688, (2016), 994-1001. doi: 10.1016/j.jallcom.2016.07.239.
  19. Shivam, V., Basu, J., Pandey, V.K., Shadangi, Y. and Mukhopadhyay, N., "Alloying behaviour, thermal stability and phase evolution in quinary alcocrfeni high entropy alloy", Advanced Powder Technology, Vol. 29, No. 9, (2018), 2221-2230. doi: 10.1016/j.apt.2018.06.006.
  20. Joseph, J., Hodgson, P., Jarvis, T., Wu, X., Stanford, N. and Fabijanic, D.M., "Effect of hot isostatic pressing on the microstructure and mechanical properties of additive manufactured alxcocrfeni high entropy alloys", Materials Science and Engineering: A, Vol. 733, (2018), 59-70. doi: 10.1016/j.msea.2018.07.036.
  21. Uporov, S., Bykov, V., Pryanichnikov, S., Shubin, A. and Uporova, N., "Effect of synthesis route on structure and properties of alcocrfeni high-entropy alloy", Intermetallics, Vol. 83, (2017), 1-8. doi: 10.1016/j.intermet.2016.12.003.
International Journal of Engineering
Volume 36, Issue 6
TRANSACTIONS C: Aspects
June 2023
Pages 1060-1065

Files

Share

How to cite

Statistics