WebApr 13, 2024 · Microstructural paths of hydrogen-assisted fatigue crack growth (HAFCG) in tempered martensitic steels were investigated relying on martensite boundary characteristics. Factors determining the HAFCG paths were tensile strength (TS)-dependent. HAFCG paths occurred preferentially along prior austenite grain boundaries … WebIn order to get familiar with the concept, it is easiest, to consider the environment of the Σ = 1 grain boundary, i.e. the boundary between two crystals with almost identical orientation. This kind of boundary is known …
Martensite Boundary Characteristics on Cycle- and Time
WebAug 24, 2024 · Figure 1. (a) Tilt grain-boundary geometry for two grains with their corresponding coordinate system, rotation axis, and misorientation angle θ. (b) Different inclinations for the same misorientation of the two grains. (c) Coincidence site lattice (CSL) of two cubic grains misoriented by θ = 36.87° around the [001] rotation axis. WebHigh-angle grain boundaries are associated with higher grain boundary energy and are generally thought to promote GBS. In this work grain boundaries are modeled as planar and bicrystalline structures specified by CSL models. birth luck
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WebJun 18, 2024 · The low angle grain boundaries (LAGBs) are dominant in the cold-rolled samples, but high angle grain boundaries (HAGBs) form in the annealed samples, indicating that the grains are refined under the action of dislocations. During cold rolling, high-density dislocations are initially introduced in the samples, which contributes to a … WebGrain boundary diffusion is the most commonly observed route for solute migration in polycrystalline materials. It is generally accepted that diffusion in crystalline solids … WebMay 28, 2024 · Low-angle grain boundaries were defined by misorientation angles ranging from 2 to 20°. The cutoff at 20° was chosen based on the observations of Heinemann et al. ( 2005) of low-angle … birth machine poster