Theoretical prediction of temperature dependent shear modulus of bulk metallic glasses

被引：5

作者：

Zhang, Xianhe ^{[1
]}

Li, Weiguo ^{[1
]}

Li, Ying ^{[1
]}

Ma, Jianzuo ^{[1
]}

Deng, Yong ^{[1
]}

Shao, Jiaxing ^{[1
]}

Wu, Xiaozhi ^{[2
,3
]}

机构：

[1] Chongqing Univ, Coll Aerosp Engn, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Inst Struct & Funct, Chongqing 400044, Peoples R China

[3] Chongqing Univ, Coll Phys, Chongqing 400044, Peoples R China

来源：

INTERMETALLICS | 2017年 / 91卷

基金：

中国国家自然科学基金;

关键词：

A. Metallic glasses; B. Elastic properties; B. Thermodynamic properties; E. Mechanical properties theory; E. Yield behavior; PLASTIC-DEFORMATION; ELASTIC PROPERTIES; STRENGTH; SIZE; FLOW;

D O I：

10.1016/j.intermet.2017.08.013

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A model of temperature dependent shear modulus and Young's modulus in bulk metallic glasses is established. The inherent relationship between the glass transition temperatures, the Debye temperature and shear modulus of bulk metallic glasses is revealed. The temperature dependent shear modulus can be predicted by our model without any fitting parameter. The model is presented based on a critical energy density criterion for plastic yielding which is derived from fundamental thermodynamics. This critical energy density consists of two parts: the heat added to the system and the input of mechanical energy, which are not completely equivalent. The agreement between theoretical results and experimental results is striking. And it is found that the temperature dependent Young's modulus could also be predicted pretty well by our model.

引用

页码：86 / 89

页数：4

共 42 条

[1]

[Anonymous], 1988, International series of monographs on physics

[2] PLASTIC-DEFORMATION IN METALLIC GLASSES [J].