60 citations · 347 across the 21 of their papers we have counts for
21 papers
Roadmap on Data-Centric Materials Science
Stefan Bauer, Peter Benner, Tristan Bereau +58
Science is and always has been based on data, but the terms "data-centric" and the "4th paradigm of" materials research indicate a radical change in how information is retrieved, h…
Stable nanofacets in [111] tilt grain boundaries of face-centered cubic metals
Tobias Brink, Lena Langenohl, Swetha Pemma +2
Grain boundaries can dissociate into facets if that reduces their excess energy. This, however, introduces line defects at the facet junctions, which present a driving force to gro…
Giant segregation transition as origin of liquid metal embrittlement in the Fe-Zn system
Reza Darvishi Kamachali, Theophilus Wallis, Yuki Ikeda +5
A giant Zn segregation transition is revealed using CALPHAD-integrated density-based modelling of segregation into Fe grain boundaries (GBs). The results show that above a threshol…
Automatic Identification of Crystal Structures and Interfaces via Artificial-Intelligence-based Electron Microscopy
Andreas Leitherer, Byung Chul Yeo, Christian H. Liebscher +1
Characterizing crystal structures and interfaces down to the atomic level is an important step for designing advanced materials. Modern electron microscopy routinely achieves atomi…
Atomic resolution observations of silver segregation in a [111] tilt grain boundary in copper
Lena Langenohl, Tobias Brink, Gunther Richter +2
Alloying a material and hence segregating solutes to grain boundaries is one way to tailor a material to the demands of its application. Direct observation of solute segregation is…
Atomic motifs govern the decoration of grain boundaries by interstitial solutes
Xuyang Zhou, Ali Ahmadian, Baptiste Gault +4
Grain boundaries, the two-dimensional (2D) defects between differently oriented crystals, control mechanical and transport properties of materials. Our fundamental understanding of…
Effect of Pore Formation on Redox-Driven Phase Transformation
Xuyang Zhou, Yang Bai, Ayman A. El-Zoka +7
When solid-state redox-driven phase transformations are associated with mass loss, vacancies are produced that develop into pores. These pores can influence the kinetics of certain…
Free, flexible and fast: orientation mapping using the multi-core and GPU-accelerated template matching capabilities in the python-based open source 4D-STEM analysis toolbox Pyxem
Niels Cautaerts, Phillip Crout, Håkon Wiik Ånes +4
This work presents the new template matching capabilities implemented in Pyxem, an open source Python library for analyzing four-dimensional scanning transmission electron microsco…
Microstructure, grain boundary evolution and anisotropic Fe segregation in (0001) textured Ti thin films
Vivek Devulapalli, Marcus Hans, Prithiv T. Sukumar +3
The structure and chemistry of grain boundaries (GBs) are crucial in determining polycrystalline materials' properties. Faceting and solute segregation to minimize the GB energy is…
Dual phase patterning during a congruent grain boundary phase transition in elemental copper
Lena Frommeyer, Tobias Brink, Rodrigo Freitas +3
The phase behavior of grain boundaries can have a strong influence on interfacial properties. Little is known about the emergence of grain boundary phases in elemental metal system…
Towards Superior High Temperature Properties in Low Density AlCrFeNiTi Compositionally Complex Alloys
Silas Wolff-Goodrich, Sebastian Haas, Uwe Glatzel +1
Three novel precipitation strengthened bcc alloys which exhibit a smooth microstructural gradient with composition have been fabricated in bulk form by induction casting. All three…
Automated crystal orientation mapping by precession electron diffraction assisted four-dimensional scanning transmission electron microscopy (4D-STEM) using a scintillator based CMOS detector
Jiwon Jeong, Niels Cautaerts, Gerhard Dehm +1
The recent development of electron sensitive and pixelated detectors has attracted the use of four-dimensional scanning transmission electron microscopy (4D-STEM). Here, we present…
Structure and hardness of in situ synthesized nano-oxide strengthened CoCrFeNi high entropy alloy thin films
Subin Lee, Dominique Chatain, Christian H. Liebscher +1
In this study, we report on face-centered cubic structured CoCrFeNi high-entropy alloy thin films with finely dispersed nano-oxide particles which are formed by internal oxidation.…
Investigation of the orientation relationship between nano-sized G-phase precipitates and austenite with scanning nano-beam electron diffraction using a pixelated detector
Niels Cautaerts, Edgar F. Rauch, Jiwon Jeong +2
Scanning nano-beam electron diffraction with a pixelated detector was employed to investigate the orientation relationship of nanometer sized, irradiation induced G-phase (MNi$…
Aluminum depletion induced by complex co-segregation of carbon and boron in a Σ 5 [3 1 0] bcc-iron grain boundary
Ali Ahmadian, Daniel Scheiber, Xuyang Zhou +4
The local variation of grain boundary atomic structure and chemistry caused by segregation of impurities influences the macroscopic properties of poylcrystalline materials. Here, t…
Strain-Rate-Dependent Deformation Behavior of Ti29Zr24Nb23Hf24 High Entropy Alloys at Elevated and Room Temperature
Tangqing Cao, Wenqi Guo, Wang Lu +6
We investigate the strain-rate-dependent mechanical behavior and deformation mechanisms of a refractory high entropy alloy, Ti29Zr24Nb23Hf24 (at.%), with a single-phase body-center…
Faceting diagram for Ag segregation induced nanofaceting at an asymmetric Cu tilt grain boundary
Nicolas J. Peter, Maria J. Duarte, Christoph Kirchlechner +2
In this work, we experimentally establish the isothermal nanofacet evolution at an asymmetric tilt grain boundary in the Cu-Ag system using a diffusion couple approach. We investig…
Early stage phase separation of AlCoCr0.75Cu0.5FeNi high-entropy powder at the nanoscale
Nicolas J. Peter, Maria J. Duarte, Christian H. Liebscher +4
High entropy alloys are generally considered to be single phase material. This state is, however, typically a non-equilibrium state after fabrication at high cooling rates. Phase c…
Could face-centered cubic titanium in cold-rolled commercially-pure titanium only be a Ti-hydride?
Yanhong Chang, Siyuan Zhang, Christian H. Liebscher +7
A face-centered cubic (FCC) phase in electro-polished specimens for transmission electron microscopy of commercially pure titanium has sometimes been reported. Here, a combination…
Joint non-rigid image registration and reconstruction for quantitative atomic resolution scanning transmission electron microscopy
Benjamin Berkels, Christian H. Liebscher
Aberration corrected scanning transmission electron microscopes (STEM) enable to determine local strain fields, composition and bonding states at atomic resolution. The precision t…
Atomic scale analysis of grain boundary deuteride growth front in Zircaloy-4
A. J. Breen, I. Mouton, W. Lu +11
Zircaloy-4 (Zr-1.5%Sn-0.2%Fe-0.1%Cr wt. %) was electrochemically charged with deuterium to create deuterides and subsequently analysed with atom probe tomography and scanning trans…