Skip to main content Accessibility help
×
Home

Precipitation Hardenable High Entropy Alloy for Tooling Applications

  • O. Stryzhyboroda (a1), U. Hecht (a1), V. T. Witusiewicz (a1), G. Laplanche (a2), A. Asabre (a2), M.B. Wilms (a3) and A. Weisheit (a3)...

Abstract

We present a high entropy alloy (HEA) from the system Al-Co-Cr-Fe-Ni with small additions of W, Mo, Si and C which was designed to allow for precipitation hardening by annealing in the temperature range from 600 to 900 °C. The alloy development was supported by thermodynamic computations using ThermoCalc software and the specimens were produced by arc melting. The microstructure of one selected sample in as-cast and annealed conditions was analysed using SEM/EDS, SEM/EBSD and TEM. The as-cast microstructure consists of spinodally decomposed BCC dendrites enveloped by FCC+Cr23C6 eutectic. Upon annealing at 700 °C for 24 h nanoscale precipitates form within the spinodal BCC as well as from FCC. Precipitation is exquisitely uniform leading to an increase in microhardness from 415 HV0.5 in the as-cast state to 560 HV0.5 after annealing. We investigated coarsening of this microstructure using varying holding time for a constant temperature of 700 °C. The microstructure evolution during coarsening and the corresponding mechanical properties obtained from instrumented indentation experiments are presented in this work.

Copyright

Corresponding author

References

Hide All
1.Gao, M.C., Yeh, J.W., Liaw, P.K. and Zhang, Y., High-Entropy Alloys Fundamentals and Applications, edited by Yeh, J.W. (Springer International Publishing, Switzerland, 2016), p.250
2.Seifi, J., Li, D., Yong, Z., Liaw, P.K. and Lewandowski, J.J., JOM 67 (10), 2288-2295 (2015)
3.Huang, P.K., Yeh, J.W., Shun, T.T. and Chen, S.K., Adv. Eng. Mater 6, 74-78 (2004)
4.Wang, W.R., Wang, W.L., Wang, S.C., Tsai, Y.C. and Lai, C.H., Intermtallics 26, 44-51 (2012)
5.Li, C., Li, J.C., Zhao, M. and Jiang, Q., J. Alloy Compd. 5045, 5515-5518 (2010)
6.Sistla, H.R., Newkirk, J.W. and Liou, F.W., Mater. Des. 81, 113-121 (2015)
7.Yang, T., Xia, S., Liu, S., Wang, C., Liu, S., Zhang, Y., Xue, J., Yan, S. and Wang, Y., Mat. Sci. Eng. A 648, 15-22 (2015)
8.Liu, W.H., Lu, Z.P., He, J.Y., Luan, J.H., Wang, Z.J., Liu, B., Liu, Y., Chen, M.W. and Liu, C.T., Acta Mater 116, 332-342 (2016)
9.He, J.Y., Wang, H., Wu, Y., Liu, X.J., Mao, H.H., Nieh, T.G. and Lu, Z.P., Intermtallics 79, 41-52 (2016)
10.He, J.Y., Wang, H., Huang, H.L., Xu, X.D., Chen, M.W., Wu, Y., Liu, X.J., Nieh, T.G., An, K. and Lu, Z.P., Acta Mater. 102, 187-196 (2016)
11.Fan, D.W., Kim, H.S., Birosca, S. and De Cooman, B.C., Critical Review of Hot Stamping Technology for Automotive Steels (MS&T 1, Detroit, MI, 2007) pp. 98
12.Besler, R., Bauer, M., Furlan, K.P., Klein, A.N. and Janssen, R., Mat. Res. 20 (6), 1518-1524 (2017)
13.Wang, W.R., Wang, W.L. and Yeh, J.W., J. Alloy Compd. 589, 143-152 (2014)
14.Goldschmidt, H.J., Acta. Cryst. 10, 727 (1957)
15.Cortes, R.G., Sepulveda, A.O., J. Mater. Sci. 22, 3880-3884 (1987)

Keywords

Related content

Powered by UNSILO

Precipitation Hardenable High Entropy Alloy for Tooling Applications

  • O. Stryzhyboroda (a1), U. Hecht (a1), V. T. Witusiewicz (a1), G. Laplanche (a2), A. Asabre (a2), M.B. Wilms (a3) and A. Weisheit (a3)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.