【摘 要】
：
Metallic glass is one of the most promising engineering material for the high elastic limit,high hardness,good corrosion resistance etc.However,the shortcom
【机 构】
：
ShanghaiInstituteofAerospaceSystemEngineering,Shanghai201109,China;DepartmentofEngineeringMechanicsa
【出 处】
：
The 5th Asian Conference on Mechanics of Functional Material
论文部分内容阅读
Metallic glass is one of the most promising engineering material for the high elastic limit,high hardness,good corrosion resistance etc.However,the shortcoming of brittleness restrict the application of metallic glass in real situation.Numerous methods like adding soft atoms,introducing crystalline/amorphous interfaces and making porous structures are proposed to improve the ductility.Although these methods enhance the plastic deformation ability,they may reduce the strength in the same time.In the paper,the tensile deformation of amorphous/amorphous nanolaminates are investigated by molecular dynamics simulations.It is found that plastic plateaus appear in the stress-strain curves and the ductility of the nanolaminates with small layer thickness is largely improved.That is because multiple shear bands initiate and move to interact with each other in the nanolaminates with small layer thickness.While in the nanolaminates with large layer thickness,shear bands are localized in narrow regions of the soft layers which lead to shear softening and failure of the materials.Moreover,the yield stress is improved in the nanolaminates with small layer thickness due to the interface obstruction of the shear band motion.It is meaningful that the nanolaminates with small layer thickness have both good ductility and high strength.The results can be used to obtain metallic glass with excellent mechanical properties.
其他文献
The concepts of carbon neutrality and biodegradability attract considerable attention from the viewpoint of a recent environmental problem.Materials satisfy
Piezoelectric materials that put less environmental load have attracted considerable attention.Poly-L-lactide-acid (PLLA) is biodegradable and carbon-neutra
Energy self-stabilization of temporally shaped nanosecond laser pulse is realized by combine photoconductive switch and Pockels Cell.
The time-dependent behavior of glass transition can be exploited to achieve shape-memory behavior in amorphous polymers.Modeling the shape-memory effect in
Plane heat conduction problems in functionally graded orthotropic temperature dependent materials are studied theoretically.The material properties such as
Due to the unnecessary introduction of reference beam,phase retrieval based on the optical field diffraction propagation always relate to a simple,compactai
BaTiO3 nanofibers were synthesized using the sol-gel and electrospinning.The variations of morphology and domain switching were observed by piezoresponse fo
In this presentation we take the view that frequency dependence of ferroelectric hysteresis is a result of direct competition between the speed of polarizat
Phononic crystal is a kind of periodic functional materials.The bandgap,a distinguishable feature of these materials which is a frequency range where the pr
This paper presents the theoretical analysis of a multilayered magneto-electro-thermoelastic hollow cylinder which consists of piezoelectric and magnetostri