Dark-field X-ray microscopy reveals mosaicity and strain gradients across sub-surface TiC and TiN particles in steel matrix composites
| Autor: | Can Yildirim, Gerald Ressel, Carsten Detlefs, Jozef Keckes, M. Kutsal, Werner Ecker, Phil Cook, J. Pörnbacher, K. Hlushko |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Residual strain chemistry.chemical_element 02 engineering and technology 01 natural sciences Mosaicity law.invention law 0103 physical sciences Microscopy General Materials Science Ceramic Composite material Metal matric composites 010302 applied physics Strain (chemistry) Mechanical Engineering Dark-field X-ray microscopy Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Dark field microscopy Synchrotron chemistry Mechanics of Materials visual_art TiN and TiC visual_art.visual_art_medium 0210 nano-technology Tin Crystal orientation Electron backscatter diffraction |
| Zdroj: | Hlushko, K, Keckes, J, Ressel, G, Pörnbacher, J, Ecker, W, Kutsal, M, Cook, P K, Detlefs, C & Yildirim, C 2020, ' Dark-field X-ray microscopy reveals mosaicity and strain gradients across sub-surface TiC and TiN particles in steel matrix composites ', Scripta Materialia, vol. 187, pp. 402-406 . https://doi.org/10.1016/j.scriptamat.2020.06.053 |
| ISSN: | 1359-6462 |
| DOI: | 10.1016/j.scriptamat.2020.06.053 |
| Popis: | Residual strain gradients and crystallographic mosaicity across embedded ceramic particles within metal-matrix composites have remained experimentally inaccessible. In this work, we use synchrotron dark-field X-ray microscopy to characterize strain and orientation gradients across ~20 µm large TiC and TiN particles embedded in a steel matrix annealed at 480 and 600 °C. The results document gradual crystallographic orientation changes across the particles and the presence of sub-grains, in contrast to electron backscatter diffraction data. These gradients appear, however, not directly correlated with the observed strain gradients, which are attributed mainly to the different strain states within particles’ interiors and envelopes. |
| Databáze: | OpenAIRE |
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