Journal ArticleDOI
Influence of dislocation density on the pop-in behavior and indentation size effect in CaF2 single crystals: Experiments and molecular dynamics simulations
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TLDR
In this paper, the indentation size effect and pop-in behavior are studied for indentations in undeformed and locally pre-deformed CaF 2 single crystals, using both nanoindentation experiments and molecular dynamics simulations.About:
This article is published in Acta Materialia.The article was published on 2011-06-01. It has received 102 citations till now. The article focuses on the topics: Indentation & Nanoindentation.read more
Citations
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Fast parallel algorithms for short-range molecular dynamics
TL;DR: Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems.
Journal ArticleDOI
Plastic deformation in nanoindentation of tantalum: A new mechanism for prismatic loop formation
T. P. Remington,Carlos J. Ruestes,Eduardo M. Bringa,Eduardo M. Bringa,B. A. Remington,Chia-Hui Lu,Bimal K. Kad,Marc A. Meyers +7 more
TL;DR: In this paper, the mechanisms of deformation under a nanoindentation in tantalum, chosen as a model body-centered cubic (bcc) metal, are identified and quantified.
Journal ArticleDOI
Nanoindentation and nanoscratching of iron: Atomistic simulation of dislocation generation and reactions
TL;DR: In this paper, the authors used molecular-dynamics simulation to study nanoindentation and scratching in an Fe (1.0) surface and found an indentation hardness of 20 GPa in good agreement with experiment and previous simulations.
Journal ArticleDOI
Comparative simulation study of the structure of the plastic zone produced by nanoindentation
TL;DR: In this paper, the authors used molecular-dynamics simulation to study nanoindentation in fcc (Cu and Al) and bcc (Fe and Ta) metals by a spherical indenter and investigate the size of the plastic zone generated.
Journal ArticleDOI
Atomistic simulation of tantalum nanoindentation: Effects of indenter diameter, penetration velocity, and interatomic potentials on defect mechanisms and evolution
Carlos J. Ruestes,Carlos J. Ruestes,Carlos J. Ruestes,Alexander Stukowski,Yizhe Tang,Diego Tramontina,Paul Erhart,Bruce Remington,Herbert M. Urbassek,Marc A. Meyers,Eduardo M. Bringa,Eduardo M. Bringa +11 more
TL;DR: In this paper, the authors carried out indentation simulations for bcc tantalum using three different interatomic potentials and presented the defect mechanisms responsible for the creation and expansion of the plastic deformation zone: twins are initially formed, giving rise to shear loop expansion and the formation of sequential prismatic loops.
References
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Journal ArticleDOI
Fast parallel algorithms for short-range molecular dynamics
TL;DR: In this article, three parallel algorithms for classical molecular dynamics are presented, which can be implemented on any distributed-memory parallel machine which allows for message-passing of data between independently executing processors.
Fast parallel algorithms for short-range molecular dynamics
TL;DR: Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems.
Book
Computer simulation using particles
R W Hockney,J W Eastwood +1 more
TL;DR: In this paper, a simulation program for particle-mesh force calculation is presented, based on a one-dimensional plasma model and a collisionless particle model, which is used to simulate collisionless particle models.
Journal ArticleDOI
Indentation size effects in crystalline materials: A law for strain gradient plasticity
William D. Nix,Huajian Gao +1 more
TL;DR: In this article, the indentation size effect for crystalline materials can be accurately modeled using the concept of geometrically necessary dislocations, which leads to the following characteristic form for the depth dependence of the hardness: H H 0 1+ h ∗ h where H is the hardness for a given depth of indentation, h, H 0 is a characteristic length that depends on the shape of the indenter, the shear modulus and H 0.
Book
The Hardness of Metals
TL;DR: Hardness measurements with conical and pyramidal indenters as mentioned in this paper have been used to measure the area of contact between solids and the hardness of ideal plastic metals. But they have not yet been applied to the case of spherical indenters.
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