Coherent twin-oriented Al3Sc-based precipitates in Al matrix. (May 2023)

• Record Type: Journal Article
• Authors: Shanmugam, Sankaran; Peterlechner, Martin; Iskandar, Mohamad Riza; Saikia, Ujjal; Kulitckii, Vladislav; Lipińska-Chwałek, Marta; Mayer, Joachim; Rösner, Harald; Hickel, Tilmann; Divinski, Sergiy V.; Wilde, Gerhard
• Is Part Of: Scripta materialia. Number 229(2023)
• Publication Date: 2023-05
• Subjects: Al-based alloy -- Precipitation -- Twin orientation relationship; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2023.115351
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: 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/Al3 Sc twin-like phase boundary corresponds to a local energy minimum. A model is proposed explaining the formation of the twin orientation relationship of an Al3 Sc nanoparticle with the Al host matrix. Graphical abstract: