2017/01/24 by Sergiy V. Divinski, Divinski, Sergiy V., Vladislav Kulitcki +13
Engineering · Materials Science · Physics and Astronomy · #Aluminum Alloy Microstructure Properties #Aluminum Alloys Composites Properties #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Microstructure and mechanical properties #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1701.06694
13 pages, 7 figures
arxiv created 2017/01/24 · openalex publication_date 2017/01/24 · arxiv updated 2017/01/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Grain boundary diffusion in severely deformed Al-based AA5024 alloy is investigated. Different states are prepared by combination of equal channel angular processing and heat treatments, with the radioisotope 57Co being employed as a sensitive probe of a given grain boundary state. Its diffusion rates near room temperature (320~K) are utilized to quantify the effects of severe plastic deformation and a presumed formation of a previously reported deformation-modified state of grain boundaries, solute segregation at the interfaces, increased dislocation content after deformation and of the precipitation behavior on the transport phenomena along grain boundaries. The dominant effect of nano-sized Al3Sc-based precipitates is evaluated using density functional theory and the Eshelby model for the determination of elastic stresses around the precipitates.