Crystal Plasticity at Micro- and Nano-scale Dimensions
Armstrong, Ronald W.
Crystal Plasticity at Micro- and Nano-scale Dimensions - Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute 2021 - 1 electronic resource (322 p.)
Open Access
The present collection of articles focuses on the mechanical strength properties at micro- and nanoscale dimensions of body-centered cubic, face-centered cubic and hexagonal close-packed crystal structures. The advent of micro-pillar test specimens is shown to provide a new dimensional scale for the investigation of crystal deformation properties. The ultra-small dimensional scale at which these properties are measured is shown to approach the atomic-scale level at which model dislocation mechanics descriptions of crystal slip and deformation twinning behaviors are proposed to be operative, including the achievement of atomic force microscopic measurements of dislocation pile-up interactions with crystal grain boundaries or with hard surface coatings. A special advantage of engineering designs made at such small crystal and polycrystalline dimensions is the achievement of an approximate order-of-magnitude increase in mechanical strength levels. Reasonable extrapolation of macro-scale continuum mechanics descriptions of crystal strength properties at micro- to nano-indentation hardness measurements are demonstrated, in addition to reports on persistent slip band observations and fatigue cracking behaviors. High-entropy alloy, superalloy and energetic crystal properties are reported along with descriptions of deformation rate sensitivities, grain boundary structures, nano-cutting, void nucleation/growth micromechanics and micro-composite electrical properties.
Creative Commons
English
books978-3-0365-0875-7 9783036508740 9783036508757
10.3390/books978-3-0365-0875-7 doi
Technology: general issues
crystal strength micro-crystals nano-crystals nano-polycrystals nano-wires whiskers pillars dislocations hardness crystal size dependencies fracture strain rate sensitivity temperature effect indentation size effect theoretical model nano-indentation crack growth dislocation models pile-ups kitagawa-takahashi diagram fracture mechanics internal stresses molecular dynamics simulations BCC Fe nanowires twin boundaries de-twinning micromechanical testing micro-pillar bi-crystal discrete dislocation pile-up grain boundary free surface anisotropic elasticity crystallographic slip molecular dynamics nanocutting iron cutting theory ab initio calculations hydrogen embrittlement cohesive strength multiaxial loading strain rate molecular dynamics simulation activation volume grain growth indentation creep size effect geometrically necessary dislocations FeCrAl micropillar dislocation strain hardening crystal plasticity simulations persistent slip band surface hard coating fatigue crack initiation fatigue cyclic deformation internal stress copper single crystal rafting behavior phase-field simulation crystal plasticity theory mechanical property ultrafine-grained materials intermetallic compounds B2 phase strain hardening behavior synchrotron radiation X-ray diffraction HMX elastic properties linear complexions strength lattice distortive transformations dislocation emission grain boundaries nanomaterials Hall-Petch relation metals and alloys interfacial delamination nucleation void formation cracking alloys nanocrystalline thermal stability IN718 alloy dislocation plasticity twinning miniaturised testing in situ electron microscopy magnesium anode tin sulfide lithium ion battery conversion reaction nanoflower rapid solidification compression
Crystal Plasticity at Micro- and Nano-scale Dimensions - Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute 2021 - 1 electronic resource (322 p.)
Open Access
The present collection of articles focuses on the mechanical strength properties at micro- and nanoscale dimensions of body-centered cubic, face-centered cubic and hexagonal close-packed crystal structures. The advent of micro-pillar test specimens is shown to provide a new dimensional scale for the investigation of crystal deformation properties. The ultra-small dimensional scale at which these properties are measured is shown to approach the atomic-scale level at which model dislocation mechanics descriptions of crystal slip and deformation twinning behaviors are proposed to be operative, including the achievement of atomic force microscopic measurements of dislocation pile-up interactions with crystal grain boundaries or with hard surface coatings. A special advantage of engineering designs made at such small crystal and polycrystalline dimensions is the achievement of an approximate order-of-magnitude increase in mechanical strength levels. Reasonable extrapolation of macro-scale continuum mechanics descriptions of crystal strength properties at micro- to nano-indentation hardness measurements are demonstrated, in addition to reports on persistent slip band observations and fatigue cracking behaviors. High-entropy alloy, superalloy and energetic crystal properties are reported along with descriptions of deformation rate sensitivities, grain boundary structures, nano-cutting, void nucleation/growth micromechanics and micro-composite electrical properties.
Creative Commons
English
books978-3-0365-0875-7 9783036508740 9783036508757
10.3390/books978-3-0365-0875-7 doi
Technology: general issues
crystal strength micro-crystals nano-crystals nano-polycrystals nano-wires whiskers pillars dislocations hardness crystal size dependencies fracture strain rate sensitivity temperature effect indentation size effect theoretical model nano-indentation crack growth dislocation models pile-ups kitagawa-takahashi diagram fracture mechanics internal stresses molecular dynamics simulations BCC Fe nanowires twin boundaries de-twinning micromechanical testing micro-pillar bi-crystal discrete dislocation pile-up grain boundary free surface anisotropic elasticity crystallographic slip molecular dynamics nanocutting iron cutting theory ab initio calculations hydrogen embrittlement cohesive strength multiaxial loading strain rate molecular dynamics simulation activation volume grain growth indentation creep size effect geometrically necessary dislocations FeCrAl micropillar dislocation strain hardening crystal plasticity simulations persistent slip band surface hard coating fatigue crack initiation fatigue cyclic deformation internal stress copper single crystal rafting behavior phase-field simulation crystal plasticity theory mechanical property ultrafine-grained materials intermetallic compounds B2 phase strain hardening behavior synchrotron radiation X-ray diffraction HMX elastic properties linear complexions strength lattice distortive transformations dislocation emission grain boundaries nanomaterials Hall-Petch relation metals and alloys interfacial delamination nucleation void formation cracking alloys nanocrystalline thermal stability IN718 alloy dislocation plasticity twinning miniaturised testing in situ electron microscopy magnesium anode tin sulfide lithium ion battery conversion reaction nanoflower rapid solidification compression