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In this work, the solidification process of the high-temperature materials NiAl-34Cr und Nb-Si is investigated with the phase-field method. This work includes an entire investigation chain from the modeling of the material systems to the conduction of representative phase-field simulations, and finally to the analyzation of the resulting microstructures.
Mechanical engineering & materials --- Phasenfeldsimulationen --- Modellierung --- gerichtete Erstarrung --- Mikrostrukturanalyse --- Phase-field Simulation --- Modeling --- Directional Solidification --- Microstructure analysis
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phase-field simulation --- fracture formation --- crystallization --- crystal dissolution --- microstructure analysis --- Mechanical engineering & materials --- Rissausbreitung --- Kristallisation
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The Special Issue ‘Physical Metallurgy of High Manganese Steels’ addresses the highly fascinating class of manganese-alloyed steels with manganese contents well above 3 mass%. The book gathers manuscripts from internationally recognized researchers with stimulating new ideas and original results. It consists of fifteen original research papers. Seven contributions focus on steels with manganese contents above 12 mass%. These contributions cover fundamental aspects of process-microstrcuture-properties relationships with processes ranging from cold and warm rolling over deep rolling to heat treatment. Novel findings regarding the fatigue and fracture behavior, deformation mechanisms, and computer-aided design are presented. Additionally, the Special Issue also reflects the current trend of reduced Mn content (3-12 mass%) in advanced high strength steels (AHSS). Eight contributions were dedicated to these alloys, which are often referred to as 3rd generation AHSS, medium manganese steels or quenching and partitioning (Q&P/Q+P) steels. The interplay between advanced processing, mainly novel annealing variants, and microstructure evolution has been addressed using computational and experimental approaches. A deeper understanding of strain-rate sensitivity, hydrogen embrittlement, phase transformations, and the consequences for the materials’ properties has been developed. Hence, the topics included are manifold, fundamental-science oriented and, at the same time, relevant to industrial application.
n/a --- TRIP --- microstructure --- medium-manganese steel --- dislocation density --- V alloying --- ultrafine grains --- intercritical annealing --- medium manganese steel --- fracture --- precipitations --- twinning induced plasticity --- deformation behavior --- fatigue --- austenite-reversed-transformation --- medium-manganese --- Lüders band --- medium-Mn steel --- fatigue behavior --- alloy design --- austenitic high nitrogen steel (HNS) --- high-entropy alloys --- mechanical properties --- retained austenite --- high-manganese steel --- localized deformation --- phase transformation --- austenite stability --- processing --- strain-hardening behavior --- TWIP steel --- recrystallization annealing --- damage --- strengthening --- cold rolling --- ultrafine-grained microstructure --- serrated flow --- multiscale simulation --- deformation twinning --- annealing --- high-Mn steels --- corrosion resistance --- TWIP --- quenching and partitioning --- high manganese steel --- lightweight --- residual stresses --- in-situ DIC tensile tests --- crash box --- deep rolling --- high strength steel --- plastic deformation --- MMn steel X20CrNiMnVN18-5-10 --- neutron diffraction --- phase field simulation --- dynamic strain aging --- cold deformation --- near surface properties --- P steel --- continuous annealing --- texture --- hydrogen embrittlement --- hot-stamping --- warm rolling --- strain-rate sensitivity --- austenite reversion --- D& --- forging --- high-manganese steels --- grain refinement --- double soaking
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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.
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 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
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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.
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
Choose an application
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.
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
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