thin films
Dislocation Climb in Two-Dimensional Discrete Dislocation Dynamics
In this paper, dislocation climb is incorporated in a two-dimensional discrete dislocation dynamics model. Calculations are carried out for polycrystalline thin films, passivated on one or both surfaces. Climb allows dislocations to escape from dislocation pile-ups and reduces the strain-hardening rate, especially for fully passivated films. Within the framework of this model, climb modifies the dislocation structures that develop during plastic deformation and results in the formation of pile-ups on slip planes that do not contain any dislocation sources.
Fatigue of polymer-supported Ag thin films
The fatigue behavior of Ag films on polyethyleneterephthalate substrates was studied using electrical resistance measurements.
Scanning electron microscopy images showed two types of failure: typical fatigue failure with extrusion–intrusion pairs, and ductile
failure with local necking. Once through-thickness cracks are formed in the metal layer, cracks propagate and the resistance increases abruptly for both failure modes. The effect of adhesion on fatigue life is discussed in terms of concurrent delamination, crack initiation and propagation.
International Conference on COMPUTATIONAL MODELLING OF NANOSTRUCTURED MATERIALS
September 4-6, 2013 Frankfurt am Main, Germany
Objectives and topics:
Development
of nanoengineering technologies and creation of nanomaterials opened
new perspectives for a number of areas of industry and everyday life.
These materials demonstrate increased strength, toughness,
biocompatibility, and can ensure higher service properties, reliability
and lifetime of devices and systems.
Having nanostructuring and
nanoengineering technologies as the tools to enhance the service
ASME IMECE 2012: Symposium on Tribology of Thin Films and Small-Scale Structures
Dear Colleagues:
We are currently soliciting abstracts for the 2012 ASME IMECE conference on November 9-15, 2012 in Houston, TX. The symposium is entitled Tribology of Thin Films and Small-Scale Structures and is part of the Mechanics of Solids, Structures and Fluids Track.
Finding a PhD position of 2012 Fall about Materials
Being a undergraduate student of Harbin Institute of Technology,China, I will get my bachelor degree in JUL 2012 majoring in Composite Materials and Engineering. Then I want to find an availible PhD position of 2012 FALL to further my study.
I have studied all the basic courses of materials and mechanics in my bachelor education. Also I have got good scores in both class and lab. And you can see details in my CV and PS attached.
New methods of analyzing indentation experiments on very thin films
Abstract - Indentation experiments on very thin films are analyzed by employing a rigorous solution to model elastic substrate effects. Two cases are discussed: elastic indentations where film and substrate are anisotropic, and elasto-plastic indentations where significant material pile-up occurs. We demonstrate that the elastic modulus of a thin film can be accurately measured in both cases, even if there is significant elastic mismatch between film and substrate.
This manuscript has been accepted for publication in Journal of Materials Research.