unravelling microstructure evolution and grain boundary

unravelling microstructure evolution and grain boundary

unravelling microstructure evolution and grain boundary

Microstructure and Phase Evolution Mechanism in Hot-pressed ... The structure evolution mechanism of the grain boundary phase during hot-pressing was studied by TEM analysis, which shows that an overall reaction, Nd + Nd 26 Ga 7 Co 10 + Nd 2 Fe 14 B → Nd 3 Co + Nd 5 Fe 2 B 6 + Nd 6 (Fe,Co) 13 Ga, occurs at 600°C in hot-pressed magnet with Nd 85 Cu 15 addition.

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What is a Grain Boundary? - Definition from Corrosionpedia

The properties of grain boundaries often determine the grains': Formation; Evolution; Stabilization (or dissolution) Grain boundaries have two types, as per their orientation: Low-angle grain boundaries are those with a misorientation less than about 11 degrees. High-angle grain boundaries are whose misorientation is greater than about 11 unravelling microstructure evolution and grain boundary Selective increase in CO2 electroreduction activity at grain unravelling microstructure evolution and grain boundary Bulk defects in a metal, such as grain boundaries, can create regions of increased strain at its surface that could affect its catalytic activity. Mariano et al. studied the electroreduction of CO2 to CO on polycrystalline gold films, a reaction that competes with H2 evolution. By annealing the films to create larger grains, they could change the types and distribution of grain boundaries at unravelling microstructure evolution and grain boundary Related searches unravelling microstructure evolution and grain boundary

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Rapid solidification microstructure evolution and grain unravelling microstructure evolution and grain boundary

In the recrystallization process, the small angle grain boundary rapidly migrates [21,31], leading to the gradual increase of grain boundary orientation difference. The grain boundary becomes more and more straight. The hexagonal grain boundary sursphericals the grain and the microstructure presents regular hexagonal equiaxed grains. Pore and grain boundary migration under a temperature unravelling microstructure evolution and grain boundary @article{osti_1294278, title = {Pore and grain boundary migration under a temperature gradient: A phase-field model study}, author = {Biner, S. B.}, abstractNote = {In this study, the collective migration behavior of pores and grain boundaries under a temperature gradient is studied for simple single crystal, bi-crystal and polycrystal configurations with a phase-field model formulism. Metallurgical and Materials Transactions A | Volume 51, issue 3 Unravelling Microstructure Evolution and Grain Boundary Misorientation in Coarse-Grained Heat-Affected Zone of EH420 Shipbuilding Steel Subject to Varied Welding Heat Inputs Authors (first, second and last of 4)

Mechanisms for microstructure evolution in electroplated unravelling microstructure evolution and grain boundary

Microstructure evolution occurs during a transient period of hours following deposition, and includes an increase in grain size, changes in preferred crystallographic texture, and decreases in resistivity, hardness, and compressive stress. Jincheng SUN | PhD Candidate | Master of Engineering | Tohoku unravelling microstructure evolution and grain boundary Unravelling Microstructure Evolution and Grain Boundary Misorientation in Coarse-Grained Heat-Affected Zone of EH420 Shipbuilding Steel Subject to Varied Welding Heat Inputs Article Jan 2020 Internal length scale and grain boundary yield strength in unravelling microstructure evolution and grain boundary Internal length scale and grain boundary yield strength in gradient models of polycrystal plasticity: How do they relate to the dislocation microstructure? - Volume 29 Issue 18 - Xu Zhang, Katerina E. Aifantis, Jochen Senger, Daniel Weygand, Michael Zaiser

Influence of Cu/Mg ratio on microstructure and mechanical unravelling microstructure evolution and grain boundary

The relationship between microstructure evolution and mechanical performance of AlZnMgCu alloys with varying Cu/Mg ratios was discussed in detail under different two-step aging (T7X). The results showed that the undissolved second-phase particles including -Al7Cu2Fe and T-Al2Mg3Zn occurred in the quenched AlZnMgCu alloys. When the Cu/Mg ratio approaches 1.64, the S-Al2CuMg unravelling microstructure evolution and grain boundary Effects of Ti addition on the microstructure and mechanical unravelling microstructure evolution and grain boundary This is probably related to strengthening by grain boundaries, L1 2 precipitates, and nanoprecipitates (GPII zone and '). The grain boundary strengthening ( g b) was evaluated using Hall-Petch equation, that is, g b = k d 1 / 2 where d is the grain size and k is 0.12 MPa m 1 / 2 for the A7075 alloy. Bridging Grain Boundary Dynamics and Microstructure Evolution unravelling microstructure evolution and grain boundary Many materials of scientific and industrial interest are polycrystalline in nature. That is, they are composed of microscopic crystalline grains, delineated by grain boundaries (GBs). The properties and utility of these materials are highly sensitive to the microstructure, composed of GBs and other defects.

Xiaodong ZOU | PhD Candidate | Northeastern University unravelling microstructure evolution and grain boundary

Unravelling Microstructure Evolution and Grain Boundary Misorientation in Coarse-Grained Heat-Affected Zone of EH420 Shipbuilding Steel Subject to Varied Welding Heat Inputs Article Jan 2020 Unravelling the Effects of Grain Boundary and Chemical Doping unravelling microstructure evolution and grain boundary Advancing organohalide perovskite solar cells requires understanding of carrier dynamics. Electronhole recombination is a particularly important process because it constitutes a major pathway of energy and current losses. Grain boundaries (GBs) are common in methylammonium lead iodine CH3NH3PbI3 (MAPbI3) perovskite polycrystalline films. First-principles calculations have suggested that GBs unravelling microstructure evolution and grain boundary Superplasticity and Grain Boundaries in Ultrafine-Grained unravelling microstructure evolution and grain boundary The role of grain boundaries in processes such as grain boundary diffusion, relaxation and grain growth is investigated. The authors explore the formation and evolution of the microstructure, texture and ensembles of grain boundaries in materials produced by severe plastic deformation.

Research Article Microstructure Evolution and Grain Growth unravelling microstructure evolution and grain boundary

Microstructure Evolution and Grain Growth Model of AZ31 Magnesium Alloy under Condition of Isothermal ZhongtangWang, 1 LingyiWang, 2 andLizhiLiu 3 School of Material Science and Engineering, Shenyang Ligong University, Shenyang , China Shenyang Institute of Technology, Liaoning, Fushun , China Brilliance Auto R and D Center (BARC), Shenyang, China Microstructure and Texture Evolution in a Post-dynamic unravelling microstructure evolution and grain boundary The SPD-induced ultrafine grain (UFG) microstructure can be characterized by the gradual transformation of low-angle into high-angle grain boundaries (LAGBs to HAGBs), that is the essence of cDRX. The dynamic UFG formation is accompanied by a dramatic decrease in dislocation density at the grain interior, while the boundaries are in non unravelling microstructure evolution and grain boundary Microstructure and Phase Evolution Mechanism in Hot-pressed unravelling microstructure evolution and grain boundary The structure evolution mechanism of the grain boundary phase during hot-pressing was studied by TEM analysis, which shows that an overall reaction, Nd + Nd 26 Ga 7 Co 10 + Nd 2 Fe 14 B Nd 3 Co + Nd 5 Fe 2 B 6 + Nd 6 (Fe,Co) 13 Ga, occurs at 600C in hot-pressed magnet with Nd 85 Cu 15 addition.

Microstructure evolution in strontium titanate Investigated unravelling microstructure evolution and grain boundary

Understanding the physical processes during fabrication and annealing of ceramic materials is a long sought goal among material scientists. Using strontium titanate as a model system for perovskite ceramics, the present work combines advanced non-destructive 3D characterization techniques and computational modeling of microstructure evolution in order to link grain morphology, interface unravelling microstructure evolution and grain boundary Microstructure Evolution during Controlled Rolling of an Nb unravelling microstructure evolution and grain boundary The microstructural evolution of an NbTi microalloyed steel with the application of coiled tubing is studied in detail during hot rolling followed by accelerated cooling and simulated coiling by m unravelling microstructure evolution and grain boundary Microstructure Evolution during Controlled Rolling of an Nb unravelling microstructure evolution and grain boundary Request PDF | Microstructure Evolution during Controlled Rolling of an NbTi Microalloyed Steel | The microstructural evolution of an NbTi microalloyed steel with the application of coiled unravelling microstructure evolution and grain boundary

Microstructural evolution during lm growth

Grain coarsening during coalescence of the contacting crys-tals is repeated until the local grain size becomes sufciently large that grain boundaries are immobile. Figure 2 illustrates several coarsening events during coalescence of In islands on amorphous C.45 The SZM in Fig. 3, characterizing microstructure evolu- Microstructural evolution and solidification cracking unravelling microstructure evolution and grain boundary Solidification cracking has been a serious problem in austenitic stainless steels. Since solidification cracking often occurs at the solidification grain boundary, the grain boundary character distribution (GBCD) in the weld metal may affect the solidification cracking susceptibility. On the other hand, the columnar grains of the weld metal are formed by the epitaxial growth from the grains in unravelling microstructure evolution and grain boundary Hiroyuki MATSUURA | Professor (Associate) | Ph. D. | The unravelling microstructure evolution and grain boundary Unravelling Microstructure Evolution and Grain Boundary Misorientation in Coarse-Grained Heat-Affected Zone of EH420 Shipbuilding Steel Subject to Varied Welding Heat Inputs Article Jan 2020

Grain-Boundary Chemistry and Intergranular Fracture in unravelling microstructure evolution and grain boundary

(1999) Influence of heat treatment on grain boundary microstructure in a Ni16Cr10Fe0022C model material. Materials Science and Technology 15:3, 237-245. Online publication date: 1-Mar-1999. Grain microstructure evolution and grain boundary junction unravelling microstructure evolution and grain boundary (2005). Grain microstructure evolution and grain boundary junction engineering. Materials Science and Technology: Vol. 21, No. 11, pp. 1261-1266. Grain boundary evolution of highly nanotwinned alloys: Effect unravelling microstructure evolution and grain boundary The effects of initial twinned microstructure on the grain growth behavior of four sputtered nanotwinned copper alloys were compared. As-deposited films were characterized by transmission electron microscopy and the microstructural evolution of the annealed samples was investigated through electron backscatter diffraction.

Grain Boundary Migration Induced by a Magnetic Field unravelling microstructure evolution and grain boundary

In this chapter, an overview of the recent research on magnetically affected grain boundary dynamics and microstructure evolution in nonferromagnetic materials is presented. Grain boundary migration can be induced by a magnetic field, if the anisotropy of the magnetic susceptibility generates a gradient of the magneticfree energy density unravelling microstructure evolution and grain boundary Grain Boundaries, Misorientation Distributions, Rodrigues unravelling microstructure evolution and grain boundary Grain Boundaries vs. Texture Why use the crystal lattice as a frame? Grain boundary structure is closely related to the rotation axis, i.e. the common crystallographic axis between the two grains. The crystal symmetry applies to both sides of the grain boundary; in order to put the misorientation into the fundamental zone (or Evolution of Microstructure in Pure Nickel during Processing unravelling microstructure evolution and grain boundary Grain boundary engineered (GBE) materials have improved properties that are associated with the high fraction special 3n boundaries in the microstructure, where n = 1,2,3. Previous experimental studies with high purity nickel before and after thermomechanical processing have shown that the fraction of 3 boundaries increased by at least unravelling microstructure evolution and grain boundary

Current understanding and future research directions at the unravelling microstructure evolution and grain boundary

there is significant grain growth, and the microstructure evolution is controlled by the interaction between pores and grain boundaries. During sintering of crystalline powder compacts, both in SSS and LPS, transport of the materials takes place from an atom source(s) to an atom sink(s) via detachment (an

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