Effect of strain rate on yielding strength of a Zr-based bulk metallic glass

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:680

Article

Li, M. C.¹  Jiang, M. Q.²  Yang, S.¹  Jiang, F.¹  He, L.¹  Sun, J.¹ 

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[2] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China

关键词: Bulk metallic glasses;    Strain rate;    Yielding strength;    Free volume;    Thermal softening;   

DOI  :  10.1016/j.msea.2016.10.081

来源: Elsevier

【 摘 要 】

Uniaxial tension and compression experiments were performed on a typical Zr52.5Cu17.9N44.6Al10Ti5 (Vit 105) bulk metallic glass over a wide range of strain rates at room temperature. It is found that the strain rate effect of the yielding strength will change from insensitive to negative with increasing strain rate above a critical value. This phenomenon can be quantitatively described by a modified cooperative-shear model of shear transformation zones that takes the adiabatic temperature rise into account. The model predicts well the present and other experimental data.

【 授权许可】

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