Strain-induced clustering in Al alloys
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in: Materialia, Jahrgang 32.2023, Nr. December, 101964, 11.11.2023.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Strain-induced clustering in Al alloys
AU - Aster, Philip
AU - Dumitraschkewitz, Phillip
AU - Uggowitzer, Peter
AU - Schmid, Florian
AU - Falkinger, Georg
AU - Strobel, Katharina
AU - Kutleša, Peter
AU - Tkadletz, Michael
AU - Pogatscher, Stefan
N1 - Publisher Copyright: © 2023
PY - 2023/11/11
Y1 - 2023/11/11
N2 - Solute clusters represent the start of decomposition during aging of aluminum alloys and can generate strengthening while keeping the strain hardening high in comparison with shearable precipitates. In this study, clusters in a pre-aged AlMgSiCu 6xxx-series and a recently developed AlMgZnCu crossover alloy were investigated by atom probe tomography (APT) and tensile testing before and after straining. Pre-aging was performed at 100 °C and 60 °C respectively, and a tensile strain of 5% was applied. The key feature detected was the formation of clusters during plastic deformation, referred to here as “strain-induced clustering”. It is explained based on diffusion enhancement by the strain-induced formation of excess vacancies during tensile testing, and evaluated by means of a simple modeling approach. In addition to the significant intrinsic contribution of clusters to strain hardening via dislocations, strain-induced clustering adds a hypothetical non-dislocation-based component to strain hardening.
AB - Solute clusters represent the start of decomposition during aging of aluminum alloys and can generate strengthening while keeping the strain hardening high in comparison with shearable precipitates. In this study, clusters in a pre-aged AlMgSiCu 6xxx-series and a recently developed AlMgZnCu crossover alloy were investigated by atom probe tomography (APT) and tensile testing before and after straining. Pre-aging was performed at 100 °C and 60 °C respectively, and a tensile strain of 5% was applied. The key feature detected was the formation of clusters during plastic deformation, referred to here as “strain-induced clustering”. It is explained based on diffusion enhancement by the strain-induced formation of excess vacancies during tensile testing, and evaluated by means of a simple modeling approach. In addition to the significant intrinsic contribution of clusters to strain hardening via dislocations, strain-induced clustering adds a hypothetical non-dislocation-based component to strain hardening.
UR - http://www.scopus.com/inward/record.url?scp=85177030339&partnerID=8YFLogxK
U2 - 10.1016/j.mtla.2023.101964
DO - 10.1016/j.mtla.2023.101964
M3 - Article
VL - 32.2023
JO - Materialia
JF - Materialia
SN - 2589-1529
IS - December
M1 - 101964
ER -