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Closed and open-ended stacking fault tetrahedra formation along the interfaces of Cu–Al nanolayered metals

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العنوان: Closed and open-ended stacking fault tetrahedra formation along the interfaces of Cu–Al nanolayered metals
المؤلفون: Huck Beng Chew, Ruizhi Li
المصدر: Philosophical Magazine. 95:2747-2763
بيانات النشر: Informa UK Limited, 2015.
سنة النشر: 2015
مصطلحات موضوعية: Crystallography, Materials science, Condensed matter physics, Tension (geology), Stacking, Tetrahedron, Strain hardening exponent, Deformation (engineering), Dislocation, Plasticity, Condensed Matter Physics, Stacking fault
الوصف: Stacking fault tetrahedra (SFTs) are volume defects that typically form by the clustering of vacancies in face-centred cubic (FCC) metals. Here, we report a dislocation-based mechanism of SFT formation initiated from the semi-coherent interfaces of Cu–Al nanoscale multilayered metals subjected to out-of-plane tension. Our molecular dynamics simulations show that Shockley partials are first emitted into the Cu interlayers from the dissociated misfit dislocations along the Cu–Al interface and interact to form SFTs above the triangular intrinsic stacking faults along the interface. Under further deformation, Shockley partials are also emitted into the Al interlayers and interact to form SFTs above the triangular FCC planes along the interface. The resulting dislocation structure comprises closed SFTs within the Cu interlayers which are tied across the Cu–Al interfaces to open-ended SFTs within the Al interlayers. This unique plastic deformation mechanism results in considerable strain hardening of the Cu–Al ...
تدمد: 1478-6443
1478-6435
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::04745e10a16f7cfdb5b4af5ccfc369d8
https://doi.org/10.1080/14786435.2015.1077283
رقم الأكسشن: edsair.doi...........04745e10a16f7cfdb5b4af5ccfc369d8
قاعدة البيانات: OpenAIRE
الوصف
تدمد:14786443
14786435