High temperature strength retention of Cu/Nb nanolaminates through dynamic strain ageing

نویسندگان

چکیده

Abstract The mechanical properties of Cu/Nb metallic nanolaminates with different layer thickness (7, 16, 34 and 63 nm) were studied by means micropillar compression tests from room temperature to 400 °C. Both strain-rate jump constant strain rate carried out they showed evidence dynamic ageing in the 7, 16 34 nm deformed at 200 °C. Dynamic was accompanied a reduction sensitivity 0, high strength retention 200 °C development shear localization deformation low strains (5%–6%) that took place along Nb layers nanolaminates. Atom probe tomography specimens revealed presence O solid solution but not Cu layers. Thus, diffusion atoms mobile dislocations found be origin around This mechanism higher (400 °C) because mainly controlled stress-assisted discovery shows novel strategy enhance through one phases.

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ژورنال

عنوان ژورنال: Materials Science and Engineering A-structural Materials Properties Microstructure and Processing

سال: 2021

ISSN: ['0921-5093', '1873-4936']

DOI: https://doi.org/10.1016/j.msea.2020.140117