Mapping strain fields induced in Zr-based bulk metallic glasses during in-situ nanoindentation by X-ray nanodiffraction

0462281 - FZÚ 2017 RIV US eng J - Journal Article
Gamcová, J. - Mohanty, G. - Michalik, Štefan - Wehrs, J. - Bednarčík, J. - Krywka, C. - Breguet, J.M. - Michler, J. - Franz, H.
Mapping strain fields induced in Zr-based bulk metallic glasses during in-situ nanoindentation by X-ray nanodiffraction.
Applied Physics Letters. Roč. 108, č. 3 (2016), 1-4, č. článku 031907. ISSN 0003-6951. E-ISSN 1077-3118
R&D Projects: GA MŠMT EE2.3.30.0057
Grant - others:OP VK 4 POSTDOK(XE) CZ.1.07/2.3.00/30.0057; AVČR(CZ) M100101221
Institutional support: RVO:68378271
Keywords : X-ray diffraction * hardness * elasticity * nanotechnology * amorphous metals
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 3.411, year: 2016

A pioneer in-situ synchrotron X-ray nanodiffraction approach for characterization and visualization of strain fields induced by nanoindentation in amorphousmaterials is introduced. In-situnanoindentation experiments were performed in transmission mode using a monochromatic and highly focused sub-micron X-ray beam on 40 μm thick Zr-based bulk metallic glass under two loading conditions. Spatially resolved X-ray diffraction scans in the deformed volume of Zr-based bulk metallic glass covering an area of 40 × 40 μm2 beneath the pyramidal indenter revealed two-dimensional map of elastic strains. The largest value of compressive elastic strain calculated from diffraction data at 1 N load was −0.65%. The region of high elastic compressive strains (<−0.3%) is located beneath the indenter tip and has radius of 7 μm.
Permanent Link: http://hdl.handle.net/11104/0261752