Microstructural and Phase Transformations in Materials

A special issue of Quantum Beam Science (ISSN 2412-382X).

Deadline for manuscript submissions: closed (31 October 2020) | Viewed by 6477

Special Issue Editors


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Guest Editor

Special Issue Information

Dear Colleagues,

The microstructural evolution and transformation of phases plays an eminent role in the design and making of structural materials in thermo-mechanical processes, as well as under application, such as aging, creep and fatigue. Moreover, crystal and microstrutural defects play inherent roles in functional materials, such as in semiconductors or solid-state electrochemistry.

Synchrotron, neutron radiation and other quantum beams are established most important probes to elucidate such wide class of microstructural and phase evolution.

The present Special Issue of Quantum Beam Science will focus on all kinds of investigation of microstructures in materials, their kinetics, dynamics and their driving parameters, including mapping (2D and 3D), transformations,  growth or refinement of grains and subgrains, dislocation structures and subgrains, grain boundaries, stress and texture, precipitation, ion gettering, swelling/shrinkage by precipitation of point defects, accumulation of crystal lattice defects by cycling phase transformations, effects and couplings of modulated structures, lattice evolution upon (cyclic) gas or Li ion loading, to mention but the most evident effects.

Methods will include conventional powder diffraction, peak profile analysis, multi-dimensional and grain-resolved diffraction, single crystal studies, combination of enhanced diffraction theories (dynamical theory, coherence), volume mapping, tomographic methods, nano-size diffraction, total scattering, magnetic probing, spectroscopy such as exafs, muons, positrons, inelastic scattering, nuclear resonance….

We envisage both ex-situ investigations of well prepared physical states as well as in-situ observations upon parametric changes of temperature, pressure and load, electric and magnetic fields, chemical potentials. Relevant sizes of objects range from engineering of steel structures, over battery electrodes, millimeter to micrometer size functional materials down to nanometers in micro-electronic devices.

With these aspects in mind, this Special Issue will collect original and review papers employing state-of-the-art quantum beams in applied research and for new and novel developments—both in characterization and in materials.

Prof. Dr. Rozaliya Barabash
Prof. Dr. Klaus-Dieter Liss
Guest Editors

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Keywords

  • microsstructure
  • crystallites
  • defects
  • grain boundaries
  • phase transformations
  • kinetics
  • dislocation cells
  • orientation correlations
  • fatigue
  • creep
  • endurance
  • residual stress
  • applied fields
  • tensors
  • lattice response
  • deformation mechanisms—slip, twinning, martensitic
  • thermal response
  • orientation dependence and anisotropy
  • texture analysis
  • modelling
  • electric fields
  • magnetic fields
  • micro-mechanical modelling
  • metals
  • Li-ion electrodes
  • piezo and ferro-electrics
  • magnetic transformations
  • functional materials

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Published Papers (2 papers)

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Research

17 pages, 2308 KiB  
Article
Use of Space-Resolved in-Situ High Energy X-ray Diffraction for the Characterization of the Compositional Dependence of the Austenite-to-Ferrite Transformation Kinetics in Steels
by Imed-Eddine Benrabah, Hugo Paul Van Landeghem, Frédéric Bonnet, Florence Robaut and Alexis Deschamps
Quantum Beam Sci. 2020, 4(1), 1; https://doi.org/10.3390/qubs4010001 - 18 Dec 2019
Cited by 2 | Viewed by 2696
Abstract
In-situ high energy X-Ray diffraction (HEXRD) was used on compositionally graded steels to study the effect of substitutional elements on ferrite growth kinetics in Fe–C–X and Fe–C–X–Y systems. Two systems were selected to illustrate the applicability of the combinatorial approach in studying such [...] Read more.
In-situ high energy X-Ray diffraction (HEXRD) was used on compositionally graded steels to study the effect of substitutional elements on ferrite growth kinetics in Fe–C–X and Fe–C–X–Y systems. Two systems were selected to illustrate the applicability of the combinatorial approach in studying such transformations, Fe–C–Mn and Fe–C–Mn–Mo. Comparison between the measured ferrite growth kinetics using HEXRD and the predicted ones using Para-Equilibrium (PE) and Local Equilibrium with Negligible Partitioning (LENP) models indicates that the fractions reached at the stasis of transformation are lower than the predicted ones. Experiments indicated a deviation of measured kinetics from both PE and LENP models when increasing Mn and decreasing Mo (in Fe–C–Mn–Mo system). The large amount of data that can be obtained using this approach can be used for validating existing models describing ferrite growth kinetics. Full article
(This article belongs to the Special Issue Microstructural and Phase Transformations in Materials)
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17 pages, 9846 KiB  
Article
In-Situ Characterization by High-Energy X-ray Diffraction of the Phase Transformations Leading to Transformation-Induced Plasticity-Aided Bainitic Steel
by Zélie Tournoud, Frédéric De Geuser, Gilles Renou, Didier Huin, Patricia Donnadieu and Alexis Deschamps
Quantum Beam Sci. 2019, 3(4), 25; https://doi.org/10.3390/qubs3040025 - 12 Dec 2019
Cited by 2 | Viewed by 3142
Abstract
The phase transformations occurring during the heat treatments leading to transformation-induced plasticity (TRIP)-aided bainitic steel have been investigated in-situ by high-energy X-ray diffraction (HEXRD) conducted with synchrotron light at 90 keV. Direct microstructure characterization has been performed by electron microscopy using electron backscatter [...] Read more.
The phase transformations occurring during the heat treatments leading to transformation-induced plasticity (TRIP)-aided bainitic steel have been investigated in-situ by high-energy X-ray diffraction (HEXRD) conducted with synchrotron light at 90 keV. Direct microstructure characterization has been performed by electron microscopy using electron backscatter diffraction and orientation and phase mapping in a transmission electron microscope. HEXRD data allow the quantification of the evolution of the austenite phase fraction with the heat treatments, as well as its carbon content and the fraction of carbides, from the lattice parameter evolution. It is shown that different combinations of austenite fraction and carbon content can be reached by adjusting the heat treatment temperature. Full article
(This article belongs to the Special Issue Microstructural and Phase Transformations in Materials)
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