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金属非晶发展至今已有多种体系并可实现厘米量级的块体制备,其各种性能也都有了广泛的研究.论文主要介绍金属非晶的单轴拉伸、单轴压缩、微柱压缩、薄板弯曲、拉伸-扭转等物理力学特性及关于其变形的理论分析.文章涵盖了金属非晶的以下一些力学特性:金属非晶的弹性模量和其溶剂金属的相近性―金属非晶通常具有2%左右的弹性应变极限,对应着GPa量级的高失效强度;金属非晶单轴拉伸、压缩时的宏观塑性特征及塑性变形的典型机制;金属非晶微观上的短程与中程原子团簇结构特点及其与非晶塑性的关联;金属非晶塑性屈服与静水压力的相关性,拉扭组合时呈现的螺旋断口特征,以及Mohr-Coulomb本构模型对这些屈服特征的适用性.最后,作者也介绍了金属非晶塑性变形的微观物理模型及连续介质力学本构,以及金属非晶的断裂与疲劳特性.
The development of metal amorphous has been a variety of systems and can achieve centimeter order block preparation, and its various properties have also been extensively studied.This paper mainly introduces the metal amorphous uniaxial stretching, uniaxial compression, micro Column compression, sheet bending, tensile-torsion and other physical and mechanical properties and theoretical analysis of its deformation.The article covers some of the following mechanical properties of amorphous metal: elastic modulus of metal and its solvent metal similarities - metal Amorphous usually has an elastic strain limit of about 2%, corresponding to a high failure strength of the GPa order; a typical mechanism of uniaxial stretching of metal, macroscopical plasticity during compression and plastic deformation; metallic short-range And the relationship between the structural characteristics of the middle-range atomic clusters and the amorphous plasticity; the correlation between the amorphous plastic yield and the hydrostatic pressure, the characteristics of the helical fracture presented by the combination of tension and torsion, and the Mohr-Coulomb constitutive model for these yield characteristics Applicability Finally, the author also introduces the micro-physical model of metal amorphous plastic deformation and the continuum mechanics constitutive, as well as the fracture and fatigue characteristics of amorphous metal.