State Key Laboratory of Nonlinear Mechanics, Chinese Academy of Sciences, Beijing 100190, China
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DOI:
10.7502/j.issn.1674-3962.2014.05.01
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Abstract:
Amorphous alloys represent a class of new materials with both glassy structure and atomic bonding, showing widely potential applications in fields of defense and aerospace projects. Atomic packing is long-range disordered in amorphous alloy, without traditional crystalline defects such as dislocations and grain boundaries. Therefore, the classical theory of plasticity based on dislocations and twins poses a great challenge to describe the plasticity of amorphous alloys. In this paper, we briefly review several representative theories for amorphous plasticity including free volume theory, shear transformation theory, shear transformation zone theory and cooperative shear model. In addition, our recent advances in understanding the plastic flow localization into shear-bands are reviewed. Finally, we identify a number of important points that deserve further investigation in this field. Keywords: amorphous alloy; plastic flow; plasticity theory; flow localization