Validity of Crystal Plasticity Models Near Grain Boundaries: Contribution of Elastic Strain Measurements at Micron Scale
نویسندگان
چکیده
منابع مشابه
Plasticity at the micron scale
Over a scale which extends from about a fraction of a micron to tens of microns, metals display a strong sizedependence when deformed non uniformly into the plastic range: smaller is stronger. This eect has important implications for an increasing number of applications in electronics, structural materials and MEMS. Plastic behavior at this scale cannot be characterized by conventional plastic...
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Severe plastic deformation is a technical method to produce functional material with special properties such as high strength and specific physical properties. Selection of an efficient severe plastic deformation for grain refinement is a challenging field of study and using a modeling technique to predict the refinement efficiency has gained a lot of attentions. A comparative study was carried...
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Several of the authors of this collection of papers presented at the international meeting on the mechanical behaviour of materials have been working continuously in that field for several decades. In contrast, in this instance we have an example of an author who, having some experience in nanoindentation and surface mechanical research, now pursues interdisciplinary studies of nanoscale proper...
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Geonetric models of grain boundaries have been extensively studied following Bollmann's original ideas. 1hese models apply only for symmorphic structures with one atom per primitive unit cell. These restrictions may be easily avoided by introducing some elementary concepts of crystallography which lead to an unified description of homophase interfaces. Ihe notion of symmetry dictated extrema is...
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High-resolution images can be analysed by geometric phase analysis (GPA) [3] or applying peak-finding routines to determine the positions of individual atomic columns. GPA is best adapted to measuring the deformation of the crystalline lattice, as the example concerning a five-fold twinned Pt nanoparticle will show (Figure 1). These star-shaped particles [4] have a disclination-like strain fiel...
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ژورنال
عنوان ژورنال: JOM
سال: 2019
ISSN: 1047-4838,1543-1851
DOI: 10.1007/s11837-019-03711-5