Microstructure and Pile-up effect on Nanoindentation measurements of FCC and BCC Metals
A study of effects of crystal orientation and pile-up on mechanical properties of Fe, Ni and Cu is made.
Keywords: nanoindentation
Comparison between Nanoindentation and Scratch Test Hardness (Scratch Hardness) Values of Copper Thin Films on Oxidised Silicon Substrates
We have measured hardness i.e. scratch hardness from the scratch tester usually used for investigating adhesion in thin films and compare this with hardness measured by the nanoindentation technique on copper thin films. We defined [...]
Microfabrication and Mechanical Characterization of Suspended Carbon Microstructures
The idea of suspended carbon micro/nanostructures has been researched by a few research groups ], however, controlled fabrication of suspended carbon micro/nano structures in desired positions and with the desired shape and dimension is still [...]
Multi-scale Discrete Dislocation Plasticity Analysis: Application to Nano-indentation
With the growing utilization of nano-scale components in various technologies like MEMS, NEMS, thin films, medical diagnostics etc, nano-indentation testing is finding new expanding applications towards quantitative determination of mechanical properties at the nano-scale. In [...]
Reliability of Atomistic-Continuum Modeling Simulations for Problems in Molecular Statics
Multi-scale computational modeling aims at developing systematic techniques for bridging scales between atomistic models and continuum models in order to increase the speed of dynamical calculations. Continuum level models can simulate large volumes of material, [...]
Nanomechanical Properties of Silica Coated Multiwall Carbon Nanotubes – Poly(methyl methacrylate) Composites
Nanomechanical properties of polymer composites, reinforced with silica coated multiwall carbon nanotubes (MWNT), have been studied using the nanoindentation technique. The nanohardness and the Young’s modulus have been found to increase strongly with the increasing [...]
Elasto-plastic Properties of Electroplated and Polycrystalline Nickel using Numerical Modelling of the Nanoindentation Test Coupled with an Inverse Method
The aim of this paper is a wide investigation of the nano scale of the elastoplastic properties of electroplated Nickel, which is extensively used in the LIGA techniques and polycrystalline hardened and annealed Nickel with [...]
Orientation E®ects of Elastic-Plastic Deformation at Surfaces: Nanoindentation of Nickel Single Crystals
Orientation effects in nanomechanical properties at the surfaces with molecular dyanmics were observed as a function of indenter size and indenter speed in three crystal orientations: 100, 110, and 111. The force vs displacement curves [...]
Theoretical Strength and Onset of Yielding in Nanoindentation
Quantum-mechanical (ab initio) approach for determining theoretical (ideal) tensile and shear strength in metals and intermetallics is briefly outlined and as an example, tensile test for defect-free MoSi2 is simulated. Theoretical values of tensile and [...]