Correlations between Shear Bands and Plasticity in Ti-Based Bulk Metallic Glass
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Supported by the State Key Laboratory of Solidification Processing in NWPU (26-TZ-2010) and the Program of Introducing Talents of Discipline to Universities (B08040)
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Abstract:
The compressive plasticity of Ti40Zr25Ni8Cu9Be18 bulk metallic glass with different specimen aspect ratio was investigated. The specimens with aspect ratios A＞1 exhibit a poor plasticity, contrariwise, showing an excellent plasticity. The maximum elongation before failure is up to about 86%. The difference in the plasticity is a result of shear bands behavior due to the geometrical constraints. The results show a linear increase in the density (spacing) of shear bands with increasing of stress, and the hardness decreases linearly with increasing of plastic strain. The results are consistent with a strain-induced local dilatation, and the free volume in the glass increases after deformation relative to the undeformed glass
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[Kou Hongchao, Wang Jun, Ma Weifeng, Chang Hui, Li Jinshan, Zhou Lian. Correlations between Shear Bands and Plasticity in Ti-Based Bulk Metallic Glass[J]. Rare Metal Materials and Engineering,2011,40(3):399~402.] DOI：[doi]