Analysis of plastic strain and deformation mode of a Zr-based two-phase bulk metallic glass in compression

Progressive shear band propagation in metallic glasses under compression

“…In the transition stage, an apparent "work-hardening" behavior can be clearly seen for the two MGs. Examining stress-strain curves in the literature [25,32,33,[41][42][43][44][45][46][47][48][49][50][51][52][53], we found that the apparent work-hardening behavior seems to be a general feature for MGs with compressive plasticity. However, this behavior has rarely been noticed [33].…”

“…To examine if this apparent work-hardening behavior is only limited to the presently studied MGs, we measured the stress-strain curves of some other MGs with certain compressive plasticity reported in literature [23,32,37,41,42,[45][46][47]64] and listed the elastic limit (r el ) and the macroscopic yield stress (r y ) in Table 2. It can be found that r el is always smaller than r y and the ratio of r el /r y lies in the range of 75-99%.…”

“…In Table 2, we list the values of e py and the plastic strain to failure, e f , which were measured from stress-strain curves of some MGs investigated by others [23,32,37,41,42,[45][46][47]64]. It can be seen that the values of e py range from 0.1% to 1.2% in different MG samples, and seem to be related to the global plasticity of materials.…”

Thermoplastic forming ability of a Mg-base bulk metallic glass composites reinforced with porous Mo particles

“…These porous Mo particles divide the amorphous matrix of BMG into the micron-scaled compartments. The small region can undergo great deformation without failure and limit the propensity of forming mature shear bands [25][26][27][28][29][30]. Besides, these porous Mo particles also behave as ductilizers (as in composites) and so as to significantly improve the plasticity.…”

Strain burst speeds in metallic glass micropillars

“…In BMGs, the deformation mode is dominated by single shear along the principal shear plane, and the plastic deformation is accompanied by flow serrations [12,13]. These flow serrations have been demonstrated to be caused by consecutive shear-band propagation on the principal shear plane [14,15], which eventually leads to the macroscopic localized shear.…”