Dynamic Deformation and Fracture Behavior of Zr-Based Bulk Metallic Glasses

Abstract:

Dynamic deformation and fracture behavior of Zr-based bulk metallic glass (BMG) and BMG composite containing dendritic β phases was investigated in this study. Dynamic compressive test results indicated that both maximum compressive stress and total strain of the BMG and BMG composite decreased with increasing test temperature because shear bands could propagate rapidly as the adiabatic heating effect was added at high temperatures. Above the glass transition temperature, total strain decreased more abruptly due to crystallization of amorphous phases. Maximum compressive stress and total strain of the BMG composite were higher than those of the BMG because β phases played a role in forming multiple shear bands. The BMG composite having more excellent dynamic properties than the BMG can be more reliably applied to the structures or parts requiring dynamic properties.

• Periodical: Key Engineering Materials (Volumes 345-346)
• Pages: 629-632
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.345-346.629
• Online since: August 2007
• Authors: Dong Geun Lee, Yang Gon Kim, Byoung Chul Hwang, Sung Hak Lee, Nack Kim
• Keywords: Amorphous Alloy, Bulk Amorphous Alloy, Composite, Crystallization, Dynamic Deformation, Glass Transition Temperature

References

[1] Z.F. Zhang, J. Eckert, and L. Schultz: Acta Mater., Vol. 51(2003), p.1167.

[2] F. Szuecs, C.P. Kim, and W.L. Johnson: Acta Mater., Vol. 49(2001), p.1507.

[3] Y. -S. Na, J. -H. Lee: Met. Mater. Int. Vol. 12 (2006), p.115.

[4] H. Choi-Yim, R. Busch, U. Koster, and W.L. Johnson: Acta Mater., Vol. 47(1999), p.2455.

[5] J. Lu, G. Ravichandran, and W.L. Johnson: Acta Mater., Vol. 51(2003), p.3429.

[6] H.A. Bruck, A.J. Rosakis, and W.L. Johnson: J. Mater. Res., Vol. 11(1996), p.503.

[7] G. Subhash, R.J. Dowding, and L.T. Kecskes: Mater. Sci. Eng. A, Vol. A334(2002), p.33.

[8] S. B Lee and NACK J. Kim: Philosophical Magazine, Vol. 85(2005), p.139.