2018/12/18 by Flemming J.H. Ehlers, Flemming J. H. Ehlers, Mahamadou Seydou +12
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Metal and Thin Film Mechanics #Microstructure and mechanical properties #Non-Destructive Testing Techniques #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1812.07291
9 pages, 3 figures
arxiv created 2018/12/18 · openalex publication_date 2018/12/18 · arxiv updated 2018/12/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The uniaxial tensile test response of a H decorated Σ 5 [100] twist grain boundary (GB) in face-centered-cubic Al has been examined with first principles. The impurity shows a strong tendency to relocate during loading. To capture these H movements, the standard model framework was extended to probe loading-unloading hysteresis. If the maximum tensile stress accepted by the H decorated GB in the slow fracture limit is reached before the maximum acceptable strain, exceeding this stress may trigger a H influx-controlled destabilization, as opposed to 'immediate' breakage. Such 'delayed' failure appears likely whenever the H attraction to a GB displays a monotonic decrease with increased loading.