Mapping of residual strains around a shear band in bulk metallic glass by nanobeam X-ray diffraction
| Autor: | Uta Kühn, Ivan Kaban, Mihai Stoica, B. Escher, Siegfried Menzel, Gavin Vaughan, Sergio Scudino, Hamed Shakur Shahabi, Jürgen Eckert |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Amorphous metal Polymers and Plastics Metals and Alloys Nucleation Pair distribution function 02 engineering and technology 021001 nanoscience & nanotechnology Residual 01 natural sciences Electronic Optical and Magnetic Materials Physics::Fluid Dynamics Condensed Matter::Soft Condensed Matter Shear modulus Crystallography Shear (geology) 0103 physical sciences Ceramics and Composites Shear stress Composite material 0210 nano-technology Shear band |
| Zdroj: | Acta Materialia. 111:187-193 |
| ISSN: | 1359-6454 |
| DOI: | 10.1016/j.actamat.2016.03.035 |
| Popis: | Despite recent progress in understanding the outstanding role of shear bands in plastic deformation of metallic glasses, the details of structural changes in the shear-induced zone is not yet known. In order to probe such changes, we determined the distribution of residual strains at short- and medium-range order around a single shear band in cold-rolled Vit105 bulk metallic glass using a nano-focused high energy X-ray beam. Plastic deformation results in significant residual normal and shear strains at distances of more than 15 μm around the shear band. Based on a detailed analysis of the distribution profile, the magnitude and the direction of the residual shear strain, it is suggested that the shear strain plays a dominant role, compared to the normal strains, for triggering nucleation of further shear bands from a mature shear band. |
| Databáze: | OpenAIRE |
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