Exploring novel deformation mechanisms in aluminum–copper alloys using in situ 4D nanomechanical testing
| Autor: | Vincent De Andrade, Nikhilesh Chawla, Francesco De Carlo, Tyler Stannard, C. Shashank Kaira |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Polymers and Plastics Alloy Metals and Alloys Nanotechnology 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Electronic Optical and Magnetic Materials Characterization (materials science) Brittleness Deformation mechanism 0103 physical sciences Ceramics and Composites engineering Crystallite Texture (crystalline) Deformation (engineering) 0210 nano-technology Nanoscopic scale |
| Zdroj: | Acta Materialia. 176:242-249 |
| ISSN: | 1359-6454 |
| DOI: | 10.1016/j.actamat.2019.07.016 |
| Popis: | Even after nearly a century of extensive use of aluminum alloys in structural applications, our understanding of such precipitation-strengthened materials is far from complete. With the advent of next generation advanced characterization techniques, our ability to probe materials in unique ways and at different length scales has established a new paradigm for devising new pathways to alloy design by engineering materials and tailoring specific properties at the nanoscale. Here, we perform in situ nanomechanical testing in conjunction with synchrotron-based hard X-ray nanotomography to capture initiation and evolution of damage in 3D in Al–Cu alloys. Precipitates in these alloys are seen to exhibit unprecedented localized deformation in compression, which is attributed to novel observations of kinking in these brittle second-phase particles, accompanied with the generation of a fine polycrystalline texture in the adjacent matrix. We observe a size-dependent transition in precipitate deformation behavior that has been thoroughly investigated using a comprehensive correlative approach. |
| Databáze: | OpenAIRE |
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