A Study on the Methodology of the Plasticity Enhancement of Amorphous Alloys

This study demonstrates that preloading via the elastostatic compression imposed on amorphous alloys at room temperature induces homogeneous plastic strain associated with structural disordering. This structural disordering causes disorder, which at room temperature creates excess free volume and in turn enhances the plasticity. In this study, we investigated the effects of various parameters, such as stress level, flow rate and preloading time, on the degree of the structural disordering at room temperature. On the basis of the present findings, we proposed a method of enhancing the plasticity of amorphous alloys.

[1]  Jae-Chul Lee,et al.  Improvement of the plasticity of bulk amorphous alloys via a low-angle shear-deforming process , 2008 .

[2]  M. Huh,et al.  Extraordinary plasticity of an amorphous alloy based on atomistic-scale phase separation , 2008 .

[3]  Jae-Chul Lee,et al.  Irreversible structural change induced by elastostatic stress imposed on an amorphous alloy and its influence on the mechanical properties , 2008 .

[4]  Y. Shibutani,et al.  Origin of the plasticity in bulk amorphous alloys , 2007 .

[5]  Y. Shibutani,et al.  Atomic packing density and its influence on the properties of Cu–Zr amorphous alloys , 2007 .

[6]  Seokmin Lee,et al.  Design of a bulk amorphous alloy containing Cu-Zr with simultaneous improvement in glass-forming ability and plasticity , 2007 .

[7]  S. Lee,et al.  A Cu-based amorphous alloy with a simultaneous improvement in its glass forming ability and plasticity , 2007 .

[8]  Jianzhong Jiang,et al.  Effect of rolling deformation on the microstructure of bulk Cu60Zr20Ti20 metallic glass and its crystallization , 2006 .

[9]  R. Raghavan,et al.  Plastic flow softening in a bulk metallic glass , 2006 .

[10]  Mo Li,et al.  Atomic scale characterization of shear bands in an amorphous metal , 2006 .

[11]  D. Kim,et al.  In situ crystallization and enhanced mechanical properties of the Zr41.2Ti13.8Cu12.5Ni10Be22.5 alloy by cold rolling , 2005 .

[12]  T. Ohkubo,et al.  Phase separation in Cu43Zr43Al7Ag7 bulk metallic glass , 2005 .

[13]  Y. Yokoyama.  Ductility improvement of Zr–Cu–Ni–Al glassy alloy , 2003 .

[14]  I. Škorvánek,et al.  Neutron irradiation effects on the structural, magnetic and mechanical properties of amorphous and nanocrystalline Fe/sub 73.5/Cu/sub 1/Nb/sub 3/Si/sub 13.5/B/sub 9/ , 1994 .

[15]  J. Sietsma,et al.  The glass transition as a free volume related kinetic phenomenon , 1990 .