Micro-alloying was performed using additions of Co and Fe to monolithic Pd40Ni40P20 bulk metallic glass to study selectively the influence on the plastic behavior in uniaxial compression and three-point bending tests. The corresponding Poisson's ratios were determined by ultrasonic measurements. The microstructure of the individual bulk metallic glasses was characterized by electron microscopy, X-ray diffraction and calorimetry. A plastic strain of 13% was found for the Co addition (1 at.%), whereas the Fe addition (0.6 at.%) led to immediate failure after reaching the elastic limit. Surprisingly, the plasticity is not reflected by the high Poisson's ratio of 0.4 since it remained unaffected by the minor alloying.
@article{arxiv.1506.02413,
title = {Impact of micro-alloying on the plasticity of Pd-based Bulk Metallic Glasses},
author = {N. Nollmann and I. Binkowski and V. Schmidt and H. Rösner and G. Wilde},
journal= {arXiv preprint arXiv:1506.02413},
year = {2015}
}