Relationship between thermophysical and mechanical properties of metallic glasses

[摘要] Mechanical (elastic moduli, yield strength, hardness) and thermophysical (glass transition, fragility indexes, heat content of shear bands) properties of metallic glasses are discussed and compared using an extensive database containing values for different families of alloys. The relationships between some of the above quantities are analysed to get insight into the shear band energetics and propagation. The failure by shear and the consequent temperature rise due to the release of elastic energy are analysed also with the help of a finite element simulation with attention to the length scales for each process. The data for different families of alloys are compared. The results of analyses and simulation are employed for discussing serrated flow and shear band propagation with an example on an Al-based metallic glass. (C) 2010 Elsevier B.V. All rights reserved.

[发布日期] 2010-08-01

[效力级别]  Proceedings Paper

[关键词] Metallic glasses;Glass transition;Mechanical properties;Shear band