Interface-mediated plasticity of nanoscale Al–Al2Cu eutectics

Liu, Guisen; Wang, Shujuan; Misra, Amit; Wang, Jian

doi:10.1016/j.actamat.2020.01.024

Interface-mediated plasticity of nanoscale Al–Al₂Cu eutectics

Journal Article · Wed Jan 15 23:00:00 EST 2020 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2020.01.024· OSTI ID:1596367

Liu, Guisen ^[1]; ^[2]; Misra, Amit ^[2]; ^[3]

University of Nebraska, Lincoln, NE (United States); University of Michigan
University of Michigan, Ann Arbor, MI (United States)
University of Nebraska, Lincoln, NE (United States)

Laser surface re-melted Al-Al₂Cu eutectic alloy with α-Al and θ-Al₂Cu nanoscale lamellae exhibits high strength and good plasticity at room temperature, implying that the nanoscale θ-Al₂Cu lamellae plastically co-deform with α-Al. Microscopy characterization reveal that plastic deformation of θ-Al₂Cu lamellae is accommodated by localized shear on unusual slip planes of {121}_Al2Cu. Herein, we elucidate interface-mediated deformation mechanisms of nanoscale Al -Al₂Cu eutectics and investigate the structure and properties of the {001}_Al$$\parallel$${001}_Al2Cu interface using atomistic simulations. Simulation results reveal that the interface is composed of two sets of misfit dislocations with the displacement shift complete vectors as Burgers vectors.

View Accepted Manuscript (DOE)

Research Organization:: University of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0016808

OSTI ID:: 1596367

Alternate ID(s):: OSTI ID: 1595155

Journal Information:: Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 186; ISSN 1359-6454

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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