منابع مشابه
Nanoindentation and incipient plasticity
This paper presents a large-scale atomic resolution simulation of nanoindentation into a thin aluminum film using the recently introduced quasicontinuum method. The purpose of the simulation is to study the initial stages of plastic deformation under the action of an indenter. Two different crystallographic orientations of the film and two different indenter geometries (a rectangular prism and ...
متن کاملToy nanoindentation model and incipient plasticity
A toy model of two dimensional nanoindentation in finite crystals is proposed. The crystal is described by periodized discrete elasticity whereas the indenter is a rigid strain field of triangular shape representing a hard knife-like indenter. Analysis of the model shows that there are a number of discontinuities in the load vs penetration depth plot which correspond to the creation of dislocat...
متن کاملIncipient plasticity in 4H-SiC during quasistatic nanoindentation.
Silicon carbide (SiC) is an important orthopedic material due to its inert nature and superior mechanical and tribological properties. Some of the potential applications of silicon carbide include coating for stents to enhance hemocompatibility, coating for prosthetic-bearing surfaces and uncemented joint prosthetics. This study is the first to explore nanomechanical response of single crystal ...
متن کاملProbing incipient plasticity by indenting colloidal glasses
Glasses are lucrative engineering materials owing to their superior mechanical properties such as high strength and large elastic strain. A central question concerns incipient plasticity - the onset of permanent deformation - that is central to their relaxation, aging, yield and fracture. Here, we use an analogue of nano-indentation performed on a colloidal glass to obtain direct images of the ...
متن کاملCrystalline Plasticity on Copper (001), (110), and (111) Surfaces during Nanoindentation
Molecular dynamics (MD) simulations are performed to study crystalline plasticity during nanoindentation by comparing the elastic-plastic response of three copper substrates with surfaces (001), (110), and (111) crystallographic planes. The effects of elastic anisotropy and crystallographic symmetry on the reduced modulus, dislocation nucleation, and subsequent microstructure evolution, are inv...
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ژورنال
عنوان ژورنال: Journal of Materials Research
سال: 1999
ISSN: 0884-2914,2044-5326
DOI: 10.1557/jmr.1999.0300