Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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Materials Map under construction

The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (2/2 displayed)

  • 2023Silver-induced γ→ε martensitic transformation in FeMn alloys : an experimental and computational study2citations
  • 2019Electron beam induced rejuvenation in a metallic glass film during in-situ TEM tensile straining11citations

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Ludovico, Andrea Alberta
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Sort Viãas, Jordi
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Spasojevic, Irena
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Bartkowska, Aleksandra
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Pellicer Vilã, Eva Maria
1 / 52 shared
Ebner, Christian
1 / 6 shared
Rentenberger, Christian
1 / 46 shared
Rajagopalan, Jagannathan
1 / 4 shared
Chart of publication period
2023
2019

Co-Authors (by relevance)

  • Ludovico, Andrea Alberta
  • Sort Viãas, Jordi
  • Spasojevic, Irena
  • Bartkowska, Aleksandra
  • Pellicer Vilã, Eva Maria
  • Ebner, Christian
  • Rentenberger, Christian
  • Rajagopalan, Jagannathan
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article

Electron beam induced rejuvenation in a metallic glass film during in-situ TEM tensile straining

  • Ebner, Christian
  • Rentenberger, Christian
  • Lekka, Christina
  • Rajagopalan, Jagannathan
Abstract

Rejuvenation of an amorphous TiAl thin film under external tensile stress by high energy electron irradiation is observed via in-situ transmission electron microscopy (TEM). Electron beam (e-beam) irradiation results in a characteristic change of the elastic properties over time, as revealed by the atomic-level elastic strain obtained from the TEM diffraction pattern. Specifically, a time dependent increase/decrease of elastic strain is observed along the tensile direction, the saturation value of which correlates linearly with the preceding stress increment/decrement but shows little dependence on the e-beam condition. The low sensitivity of the saturation value to the e-beam condition indicates that the elastic strain change is induced by the structural transitions of a population (dependent on stress increment/decrement) of unstable atomic configurations to local, elastically soft areas. Classical molecular dynamics (MD) simulations including high energy electron scattering events are performed under tensile load to obtain insights into the structural modification that leads to time dependent changes in elastic strain under irradiation. The simulations reveal a change in quantities that are characteristic of structural rejuvenation, with a reduction of the local shear modulus manifesting as time dependent increase in the atomic-level elastic strain at fixed external stress. This link to the experimental data is confirmed by tracking elliptic distortions of simulated diffraction patterns calculated from MD configurations. The presented findings are highly relevant for experimental characterization of amorphous materials using TEM and give a new perspective on local structural modifications by electron irradiation. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Topics
  • impedance spectroscopy
  • amorphous
  • thin film
  • simulation
  • glass
  • glass
  • molecular dynamics
  • transmission electron microscopy