By Mohammed Cherkaoui;Laurent Capolungo
Atomistic and Continuum Modeling of Nanocrystalline Materials
Atomistic and Continuum Modeling of Nanocrystalline Materialsdevelops a whole and rigorous cutting-edge research of the modeling of the mechanical habit of nanocrystalline (NC) fabrics. between different key issues the fabric specializes in the radical suggestions used to foretell the habit of nanocrystalline fabrics. specific cognizance is given to fresh theoretical and computational frameworks combining atomistic and continuum methods. additionally, the main proper deformation mechanisms governing the reaction of nanocrystalline fabrics are addressed and mentioned in correlation with on hand experimental information.
Drawing upon years of sensible and educational event and utilizing various examples, authors Mohammed Cherkaoui and Laurent Capolungo hide a large spectrum of fabric, together with:
New modeling innovations and their power functions and attainable extensions, corresponding to molecular dynamics, pressure gradient established finite aspect simulations, and novel micromechanical schemes
Novel versions describing plastic deformation strategies taking place in nanocrystalline fabrics together with grain boundary dislocation emission
How to build and use a molecular dynamics code for functional use within the modeling of NC fabrics
Atomistic and Continuum Modeling of Nanocrystalline fabricsis a must-have e-book for researchers in addition to graduate scholars who're both coming into those fields for the 1st time, or these already undertaking learn during this region and desiring to expand their wisdom of nanocrystalline materials.
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Additional info for Atomistic and Continuum Modeling of Nanocrystalline Materials: Deformation Mechanisms and Scale Transition
TEM observations revealed that no regular organization of the atoms can be observed in a triple junction. This can be clearly observed in region denoted d in Fig. 5. Also, as in the case of grain boundaries, triple junctions are regions of concentrated defects such as pores, flaws, and impurities. 2 Mechanical Properties Nanocrystalline materials exhibit fascinating properties which are intimately linked to their particular microstructure characterized by a large volume fraction of grain boundaries.
W. Siegel. On the hardening and softening of nanocrystalline materials. Cancun, Mexico, (1993) 29. R. W. Siegel. Mechanical behavior of nanocrystalline Cu, Pd and Ag samples. New Orleans, LA, USA: TMS – Miner. Metals & Mater. , (1991) 30. , A. J. Benson, Progress in Materials Science 51, (2006) 31. , Progress in Materials Science 33, (1989) 32. , Progress in Materials Science 35, (1991) 33. , Journal of Physics E (Scientific Instruments) 10, (1977) 34. G. A. Buhrman, Journal of Applied Physics 47, (1976) 35.
Indeed, one can observe spiral like shape possibly engendered by the scrapper used during the collection of particles produced by condensation on liquid nitrogen cooled cold finger. Although not shown here, as shown by HRTEM observations, each spiral contains nanograins with poor particle bonding . Fig. 2 Powder Consolidation Following the synthesis of nanoparticle powder, which can take the form of nanograin agglomerates in the case of ball milling processed particles, a consolidation step is necessary to ensure of the bonding of particles.