Grain boundary phases in bcc metals

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August undefined, 2024

WebJun 4, 1998 · The zero‐temperature energies and equilibrium volume expansions of point‐defect‐free asymmetrical grain boundaries (GBs) in bcc metals are determined … WebFeb 6, 2024 · The concentration of Al at the grain boundaries of medium-entropy alloy CrCoNiAl 0.014 was higher at 300 k than at 700 k (Figure 5e,f and Figure 6e,f). The formation of the BCC crystal structure on the grain boundary surface of the medium-entropy alloy CrCoNiAl 0.014 is related to the increase in the concentration of Al at the …

Grain boundary phases in bcc metals - Nanoscale (RSC Publishing)

WebFeb 1, 2024 · Thus, Gunkelmann et al. , using the modified version of the Ackland EAM potential to study the behavior of polycrystalline iron at a strain rate of about 10 9 s −1, showed that yielding occurs through dislocation activities around the grain boundary at 10 GPa with the onset stress of a structural bcc-to-hcp phase transformation σ T of about ... WebApr 11, 2024 · The compression test and molecular dynamics simulations reveals that high strength and hardening ability of Al–Fe alloys could be attributed to the 9R phase and nanoscale grain sizes. Richter et.al [27] synthesized Al-Zr and Al-Ti films containing significant incoherent twin boundaries and 9R phases by magnetron sputtering method. … fish and chips in etobicoke

Grain boundary phases in bcc metals (Journal Article)

WebGrain boundary phases in bcc metals - Nanoscale (RSC Publishing) Maintenance work is planned for Wednesday 5th April 2024 from 09:00 to 10:30 (BST). During this time the performance of our website may be affected - searches may run slowly and some pages … WebMay 1, 2024 · Grain boundary phases in bcc metals. fish and chips in edmonton ab

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Grain boundary phases in bcc metals. - Abstract - Europe PMC

WebSep 17, 2024 · The IGC samples consist of equiaxed nano-sized grains (15.4 ± 3 nm) as shown in Fig. 1a and exclusively of the BCC phase as detected by XRD and TEM (Supplementary Fig. 1 ). The IGC nanograined... WebNov 18, 2024 · While grain boundary structures created by the \gamma-surface method as a union of two perfect half crystals have been studied extensively, it is known that the method has limitations and does not always predict the correct ground states. fish and chips in falmouthWebMar 18, 2024 · The theory of grain boundary (the interface between crystallites, GB) structure has a long history 1 and the concept of GBs undergoing phase transformations was proposed 50 years ago 2, 3. The ... fish and chips in faversham

"WebJan 29, 2024 · Grain boundaries (GBs) can be treated as two-dimensional (2-D) interfacial phases (also called “complexions”) that can undergo interfacial phase-like transitions. " - Grain boundary phases in bcc metals

Grain boundary phases in bcc metals

$Segregation of Refractory Metals at Grain Boundaries in High$

WebJun 30, 2016 · The grain boundaries of three Laves phase-related body-center-cubic (bcc) solid-solution, metal hydride (MH) alloys with different phase abundances were closely examined by scanning electron … WebApr 10, 2024 · In this study, we focus on two tilt symmetric grain boundaries (GBs) Σ5(210) and Σ5(310) commonly observed in the polycrystalline metals and alloys [].In order to …

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WebFeb 1, 2024 · We predict structure and energy of low-angle (1 1 ¯ 0) pure twist grain boundaries (GBs) in five BCC transition metals (β-titanium, molybdenum, niobium, … WebMar 18, 2024 · The theory of grain boundary (the interface between crystallites, GB) structure has a long history1 and the concept of GBs undergoing phase transformations …

http://mimp.materials.cmu.edu/rohrer/papers/2015_03.pdf WebMar 29, 2024 · We report a computational discovery of novel grain boundary structures and multiple grain boundary phases in elemental body-centered cubic (bcc) metals …

WebNov 30, 2024 · In practice, most components often receive impact loads during service. In order to ensure the service safety of components, impact toughness evaluation is essential. To the best of our knowledge, the previous studies were mainly focused on the quasi-static tensile deformation, and the impact toughness of bimodal grain structured metals have … WebOct 15, 2024 · We use atomistic simulations to investigate grain boundary (GB) phase transitions in elemental body-centered cubic (bcc) metal tungsten. Motivated by recent …

WebAbstract. We report a computational discovery of novel grain boundary structures and multiple grain boundary phases in elemental bcc tungsten. While grain boundary structures created by the \gamma-surface method as a union of two perfect half crystals have been studied extensively, it is known that the method has limitations and does not …

WebFeb 1, 1995 · In grain boundaries with a high segregation level the nature and content of the major element strongly vary with GB crystallographic parameters, depending on the orientation of the grain boundary plane. HREM studies of grain boundary structure do not reveal any intergranular glassy phase in the material. References (39) P.H. Pumphrey cam screening for deliriumWebEstimation of grain boundary segregation enthalpy and its role in stable nanocrystalline alloy design. Grain boundary segregation provides a method for stabilization of nanocrystalline metals—an alloying element that will segregate to the boundaries can lower the grain boundary energy, attenuating the…. cams crestviewWebOct 9, 2015 · For example, Cu-Al-Mn shape memory alloys that undergo a β 1 (bcc) ↔ β 1 ʹ (monoclinic) martensitic transformation exhibit superelasticity. Their recoverable strain is significantly improved when microstructural parameters, such as crystallographic orientation, grain size, and constituent phases, are optimized [1,2]. cams crawleyWebWe report a computational discovery of novel grain boundary structures and multiple grain boundary phases in elemental bcc tungsten. While grain boundary structures created … fish and chips in fairfieldWebFeb 21, 2015 · A grain can be single crystal or exhibits two or more crystalline domains, in which the crystalline lattice exhibit distinct crystallographic orientations, the boundaries of these domains... fish and chips industryWebSimilar grain sizes as well as bimodal grain size distributions have been reported in the milling of W [25,36] and other BCC metals such as Fe . The Rietveld refinements also … fish and chips in ferndownWebThe grain boundaries separate variously-oriented crystal regions (polycrystalline) in which the crystal structures are identical. Figure 3(b) represents four grains of different … camscrestview automobile machine shop