Mechanical Properties and Structures of High Entropy Alloys and Bulk Metallic Glasses Composites

Abstract:

Bulk metallic glasses (BMGs) and high entropy alloys (HEAs) have unique structures at the length scales of micro- and nano-metre, and exhibit unique properties, which make them potential materials for structural applications. The tensile ductility of dendrite/BMG composites can be greatly improved by Bridgman solidification. The BCC structured HEA with a composition of Ti0.5AlCoCrFeNi exhibits ultrahigh fracture strength which is competitive to most of the BMGs, moreover, the strength can be sustained at high temperatures. The phase changes of HEAs are closely related to the atomic packing efficiency (APE).

• Periodical: Materials Science Forum (Volumes 654-656)
• Pages: 1058-1061
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.654-656.1058
• Online since: June 2010
• Authors: Yong Zhang
• Keywords: BMG Composite, Bridgman Solidification, Bulk Metallic Glass (BMG), Dendrite, High Entropy Alloy, Tensile Elongation

References

[1] W.H. Wang: Advanced Materials Vol. 21 (2009), p.4524.

[2] A. Inoue: Rev. Adv. Mater. Sci. Vol. 18(2008), p.1.

[3] Z.P. Lu, C.T. Liu: J. Mater. Sci. Vol. 39 (2004), P. 3965.

[4] W. L. Johnson: MRS Bull. Vol. 24 (1999), p.42.

[5] J. W. Yeh, S. K. Chen, S. J. Lin, J. Y. Gan, T. S. Chin, T. T. Shun, C. H. Tsau, S. Y. Chang: Adv. Eng. Mater. Vol. 6 (2004), p.299.

[6] Y.J. Zhou, Y. Zhang, Y.L. Wang, G.L. Chen: Applied Physics Letters, Vol. 90 (2007), 181904.

[7] X. F. Wang, Y. Zhang, Y. Qiao and G. L. Chen: Intermetallics Vol. 15 (2007), p.357.

[8] B. Cantor, I. T. H. Chang, P. Knight, A. J. Vincent: Mater. Sci. Eng. A Vol. 375 (2004), p.213.

[9] F.J. Wang, Y. Zhang, G.L. Chen and H.A. Davies: International Journal of Modern Physics B, Vol. 23(6, 7) (2009), p.1254.

[10] F. J Wang, Y. Zhang and G.L. Chen: Journal of Alloys and Compounds, Vol. 478 (2009), p.321.

[11] F.J. Wang, Y. Zhang, G. L. Chen and H.A. Davies: ASME Transaction: Journal of Engineering Materials Science and Technology, Vol. 131 (2009), 034501.

[12] Y.J. Zhou, Y. Zhang, F.J. Wang, G.L. Chen: Applied Physics Letters, Vol. 92 (2008), 241917.

[13] J.W. Qiao, Y. Zhang, P. Feng, Q.M. Zhang, G.L. Chen: Material Science and Engineering A, Vol. 515 (2009), p.141.

[14] J.W. Qiao, S. Wang, Y. Zhang, G.L. Chen and P.K. Liaw: Applied Physics Letters Vol. 94 (2009), 151905.

[15] S. Wang, Y. Zhang: Science in China Series G: Physics, Mechanics & Astronomy, Vol. 52(10) (2009), p.1632.

[16] Y. Zhang, et al, Journal of ASTM, submitted; Y.J. Zhou, PhD Thesis of the USTB, (2008).

[17] Y. Zhang, Y.J. Zhou, J.P. Lin, G.L. Chen, P.K. Liaw: Advanced Engineering Materials, Vol. 10(6) (2008), p.534.