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Precipitation Hardenable High Entropy Alloy for Tooling Applications

Published online by Cambridge University Press:  22 February 2019

O. Stryzhyboroda ,
U. Hecht ,
V. T. Witusiewicz ,
G. Laplanche ,
A. Asabre ,
M.B. Wilms  and
A. Weisheit
O. Stryzhyboroda*
Affiliation:
ACCESS e.V., Intzestraße 5, D-52072 Aachen, Germany
U. Hecht
Affiliation:
ACCESS e.V., Intzestraße 5, D-52072 Aachen, Germany
V. T. Witusiewicz
Affiliation:
ACCESS e.V., Intzestraße 5, D-52072 Aachen, Germany
G. Laplanche
Affiliation:
Institut für Werkstoffe, Ruhr-Universität Bochum, D-44780 Bochum, Germany
A. Asabre
Affiliation:
Institut für Werkstoffe, Ruhr-Universität Bochum, D-44780 Bochum, Germany
M.B. Wilms
Affiliation:
Fraunhofer-Institut für Lasertechnik ILT, Steinbachstraße 15, 52074Aachen, Germany
A. Weisheit
Affiliation:
Fraunhofer-Institut für Lasertechnik ILT, Steinbachstraße 15, 52074Aachen, Germany
*
*(Email: [email protected])
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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.

Keywords

additive manufacturingcrystalmicrostructuremodelingthermodynamics
Type
Articles
Information
MRS Advances , Volume 4 , Issue 25-26: Processing and Manufacturing , 2019 , pp. 1427 - 1433
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Copyright
Copyright © Materials Research Society 2019 

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References

REFERENCES

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.250CrossRefGoogle Scholar
Seifi, J., Li, D., Yong, Z., Liaw, P.K. and Lewandowski, J.J., JOM 67 (10), 2288-2295 (2015)CrossRefGoogle Scholar
Huang, P.K., Yeh, J.W., Shun, T.T. and Chen, S.K., Adv. Eng. Mater 6, 74-78 (2004)10.1002/adem.200300507CrossRefGoogle Scholar
Wang, W.R., Wang, W.L., Wang, S.C., Tsai, Y.C. and Lai, C.H., Intermtallics 26, 44-51 (2012)CrossRefGoogle Scholar
Li, C., Li, J.C., Zhao, M. and Jiang, Q., J. Alloy Compd. 5045, 5515-5518 (2010)Google Scholar
Sistla, H.R., Newkirk, J.W. and Liou, F.W., Mater. Des. 81, 113-121 (2015)CrossRefGoogle Scholar
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)CrossRefGoogle Scholar
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)CrossRefGoogle Scholar
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)10.1016/j.intermet.2016.09.005CrossRefGoogle Scholar
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)CrossRefGoogle Scholar
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. 98Google Scholar
Besler, R., Bauer, M., Furlan, K.P., Klein, A.N. and Janssen, R., Mat. Res. 20 (6), 1518-1524 (2017)CrossRefGoogle Scholar
Wang, W.R., Wang, W.L. and Yeh, J.W., J. Alloy Compd. 589, 143-152 (2014)CrossRefGoogle Scholar
Goldschmidt, H.J., Acta. Cryst. 10, 727 (1957)Google Scholar
Cortes, R.G., Sepulveda, A.O., J. Mater. Sci. 22, 3880-3884 (1987)CrossRefGoogle Scholar