Study on Formation and Evolution Kinetics of Multi - Shear Band in Amorphous Alloy View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2012-2015

FUNDING AMOUNT

280000 CNY

ABSTRACT

Metallic glasses (MGs) have shown wide potential applications as advanced materials in fields such as defense applications, space projects, etc. However, plastic deformation in MGs at room temperature is prone to be localized into nanoscale shear bands and leads to catastrophic failure, accompanied with very limited plasticity. This greatly impedes their structural applications. Lately, the room-temperature plasticity in MGs have been greatly developed by triggering the interaction and multiplication of shear bands, via the introducation of the residual stress, the optimum design of material composites,and the presence of nanoscale or microscale heterogeneities. Nevertheless, the understanding of the behavior of multiple shear bands in MGs is still lacking, and the key proplem is the formation and evolution dynamics of multiple shear bands and their underlying mechanisms. Therefore, this research is aimed to investigate the formation mechanism and dynamic evolution process of multiple shear bands, via systematical experiments, numerical simulation, and theoretical analyses. The evolution of the shear band patterns will be characterized quantitatively and the inherent laws will be uncovered. Then, a new constitutive model of MGs will be established and the whole process of shear band multiplication will be numeri More... »

URL

http://npd.nsfc.gov.cn/projectDetail.action?pid=11202221

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