TY - JOUR A1 - Shanmugam, Sankaran A1 - Peterlechner, Martin A1 - Iskandar, Mohamad Riza A1 - Saikia, Ujjal A1 - Kulitckii, Vladislav A1 - Lipińska-Chwałek, Marta A1 - Mayer, Joachim A1 - Rösner, Harald A1 - Hickel, Tilmann A1 - Divinski, Sergiy V. A1 - Wilde, Gerhard T1 - Coherent twin-oriented Al3Sc-based precipitates in Al matrix JF - Scripta Materialia N2 - Al3(Sc,Zr,Ti) nanoparticles with an ideal twin-type orientation relationship to Al host matrix were found in cold-rolled and subsequently annealed Al-based alloy. Atomic-scale investigations using high-resolution scanning transmission electron microscopy identified particles that form prominent coherent (111) twin-type interfaces along their longer facets and semi-coherent twin interfaces on their shorter facets. Ab-initio calculations showed that a coherent Al/Al3Sc twin-like phase boundary corresponds to a local energy minimum. A model is proposed explaining the formation of the twin orientation relationship of an Al3Sc nanoparticle with the Al host matrix. KW - Al-based alloy KW - Precipitation KW - Twin orientation relationship KW - Ab initio calculations KW - Transition electron microscopy PY - 2023 DO - https://doi.org/10.1016/j.scriptamat.2023.115351 SN - 1359-6462 VL - 229 SP - 1 EP - 6 PB - Elsevier BV AN - OPUS4-58789 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -