TY - JOUR A1 - Rizzardi, Q. A1 - Derlet, P. M. A1 - Maaß, Robert T1 - Microstructural signatures of dislocation avalanches in a high-entropy alloy T2 - Physical review materials N2 - Here, we trace in situ the slip-line formation and morphological signature of dislocation avalanches in a highentropy alloy with the aim of revealing their microstructural degree of localization. Correlating the intermittent microplastic events with their corresponding slip-line patterns allows defining two main event types, one of which is linked to the formation of new slip lines, whereas the other one involves reactivation of already existing slip lines. The formation of new slip lines reveals statistically larger and faster avalanches. The opposite tendency is seen for avalanches involving reactivation of already existing slip lines. The combination of both these types of events represents the highest degree of spatial avalanche delocalization that spans the entire sample, forming a group of events that determine the truncation length scale of the truncated power-law scaling. These observations link the statistics of dislocation avalanches to a microstructural observable. PB - American Physical Society CY - College Park, MD KW - High-entropy alloy KW - Dislocation avalanches PY - 2021 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/52458 AN - OPUS4-52458 SN - 2475-9953 VL - 5 IS - 4 SP - 3604 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany