144 citations · 358 across the 29 of their papers we have counts for
29 papers
Zonal dislocations in Laves phases: A coupled synchro-shear slip mechanism
Sang-Hyeok Lee, Mariano Forti, Thomas Hammerschmidt +6
Synchro-shear is the primary plastic deformation mechanism in Laves phases at elevated temperatures, mediated by synchro-Shockley partial dislocations-zonal dislocations that proce…
Role of defects in the thermodynamic stability of grain boundary phases at asymmetric tilt boundaries in copper
Swetha Pemma, Lena Langenohl, Saba Saood +5
Grain boundaries can exist as different grain boundary phases (also called complexions) with individual atomic structures. The thermodynamics of these defect phases in high-angle g…
Vacuum Dealloyed Brass as Li-Metal Battery Current Collector: Effect of Zinc and Porosity
Eric V Woods, Xinren Chen, Shaolou Wei +19
"Anode-free" lithium-metal batteries promise significantly higher energy density than conventional graphite-based lithium-ion batteries; however, lithium dendrite growth can lead t…
Secondary Grain Boundary Dislocations Alter Segregation Energy Spectra
Xinren Chen, William Gonçalves, Yi Hu +9
Grain boundaries (GBs) trigger structure-specific chemical segregation of solute atoms. According to the three-dimensional (3D) topology of grains, GBs - although defined as planar…
Microstructural features and hydrogen diffusion in bcc FeCr alloys: a comparison between the Kelvin probe- and nanohardness based- methods
Jing Rao, Binhan Sun, Arulkumar Ganapathi +6
Hydrogen embrittlement can result in a sudden failure in metallic materials, which is particularly harmful in industrially relevant alloys, such as steels. A more comprehensive und…
Thermal modification of ZrCu metallic glass nanolaminates: Structure and mechanical properties
Andrea Brognara, Chanwon Jung, Cristiano Poltronieri +4
The effects of thermal treatments on metallic glass nanolaminates (NLs), with a composition of ZrCu and ZrCu and a bilayer period of 50 nm, were explore…
Effect of the atomic structure of complexions on the active disconnection mode during shear-coupled grain boundary motion
Swetha Pemma, Rebecca Janisch, Gerhard Dehm +1
The migration of grain boundaries leads to grain growth in polycrystals and is one mechanism of grain-boundary-mediated plasticity, especially in nanocrystalline metals. This migra…
Nanoscale brittle-to-ductile transition of the C15 CaAl Laves phase
Anwesha Kanjilal, Ali Ahmadian, Martina Freund +4
The influence of temperature on the deformation behaviour of the C15 CaAl Laves phase, a key constituent for enhancing the mechanical properties of Mg alloys up to service temp…
Fracture of the 15 CaAl Laves phase at small length-scales
James P. Best, Anwesha Kanjilal, Alireza Ghafarollahi +8
The cubic 15 CaAl Laves phase is a crucial brittle intermetallic precipitate in Mg-Al-Ca alloys. Although knowledge of the mechanical properties of coexisting phases is esse…
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…
Fabrication and extreme micromechanics of additive metal microarchitectures
Sung-Gyu Kang, Barbara Bellon, Lalithkumar Bhaskar +14
The mechanical performance of metallic metamaterials with 3-dimensional solid frames is typically a combination of the geometrical effect ("architecture") and the characteristic si…
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…
Microstructure of a spark-plasma-sintered Fe2VAl-type Heusler alloy for thermoelectric application
Leonie Gomell, Imants Dirba, Hanna Bishara +8
The influence of microstructure on thermoelectricity is increasingly recognized. Approaches for microstructural engineering can hence be exploited to enhance thermoelectric perform…
Effect of the atomic structure of complexions on the active disconnection mode during shear-coupled grain boundary motion
Swetha Pemma, Rebecca Janisch, Gerhard Dehm +1
The migration of grain boundaries leads to grain growth in polycrystals and is one mechanism of grain-boundary-mediated plasticity, especially in nanocrystalline metals. This migra…
Constructing phase diagrams for defects by correlated atomic-scale characterization
Xuyang Zhou, Prince Mathews, Benjamin Berkels +10
Phase transformations and crystallographic defects are two essential tools to drive innovations in materials. Bulk materials design via tuning chemical compositions has been system…
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…
Interstitial segregation has the potential to mitigate liquid metal embrittlement in iron
Ali Ahmadian, Daniel Scheiber, Xuyang Zhou +6
The embrittlement of metallic alloys by liquid metals leads to catastrophic material failure and severely impacts their structural integrity. The weakening of grain boundaries by t…
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…
Universality of grain boundary phases in fcc metals: Case study on high-angle [111] symmetric tilt grain boundaries
Tobias Brink, Lena Langenohl, Hanna Bishara +1
Grain boundaries often exhibit ordered atomic structures. Increasing amounts of evidence have been provided by transmission electron microscopy and atomistic computer simulations t…
Green laser powder bed fusion based fabrication and rate-dependent mechanical properties of copper lattices
Sung-Gyu Kang, Ramil Gainov, Daniel Heußen +5
Lattice structures composed of periodic solid frames and pores can be utilized in energy absorption applications due to their high specific strength and large deformation. However,…
Chemical Partitioning at Crystalline Defects in PtAu as a Pathway to Stabilize Electrocatalysts
Xuyang Zhou, Olga Kasian, Ting Luo +8
Dissolution of electrocatalysts during long-term and dynamic operation is a challenging problem in energy conversion and storage devices such as fuel cells and electrolyzers. To de…
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…
Preferred corrosion pathways for oxygen in Al2Ca-twin boundaries and dislocations
Nicolas J. Peter, Daniela Zander, Xumeng Cao +5
With an ongoing discussion on the oxygen diffusion along crystal defects remaining, it is difficult to study this phenomenon in Al containing intermetallic materials due to its rap…
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…