Karsten Durst
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View article: Identifying grain boundary and intragranular pinning centres in Sm2(Co,Fe,Cu,Zr)17 permanent magnets to guide performance optimisation
Identifying grain boundary and intragranular pinning centres in Sm2(Co,Fe,Cu,Zr)17 permanent magnets to guide performance optimisation Open
Permanent magnets draw their properties from a complex interplay of chemical composition and phase, each with their associated intrinsic magnetic properties. Gaining an understanding of these interactions is the key to deciphering the orig…
View article: Fatigue of metal-ceramic substrates through thermal cycling and its consequences for silver-sintered joint reliability
Fatigue of metal-ceramic substrates through thermal cycling and its consequences for silver-sintered joint reliability Open
Understanding the aging mechanisms of materials is essential for improving the reliability of power modules in the field of power electronics. This study investigates the reliability of silver-sintered joints, focusing on the fatigue behav…
View article: Fatigue Performance of Additively Manufactured Ti‐6Al‐4V: Impact of Different Kinds of Porosities, Surface, and Heat Treatments in Laser Powder Bed Fusion Productivity Parameters
Fatigue Performance of Additively Manufactured Ti‐6Al‐4V: Impact of Different Kinds of Porosities, Surface, and Heat Treatments in Laser Powder Bed Fusion Productivity Parameters Open
In this article, the influence of lack of fusion (LoF) and keyhole (KH) porosity on static and cyclic mechanical properties in parts with as‐build and machined surfaces is analyzed using tensile testing and rotational bending fatigue testi…
View article: Recovery of metastable solid solution from a severe plastically deformed Cu alloyed FeMnCoCr high entropy alloy
Recovery of metastable solid solution from a severe plastically deformed Cu alloyed FeMnCoCr high entropy alloy Open
We report on the recovery of metastable Face Centred Cubic (FCC) phase from a severe plastically deformed 1 at% Cu alloyed non-equiatomic FeMnCoCr high-entropy alloy (HEA) for the first time. The well explored Cu free variant of the non-eq…
View article: Coupled electromigration–nanoindentation study on dislocation nucleation in SrTiO <sub>3</sub>
Coupled electromigration–nanoindentation study on dislocation nucleation in SrTiO <sub>3</sub> Open
Modern functional oxides are mainly engineered by doping, essentially by tuning the defect chemistry. Recent studies suggest that dislocations offer a new perspective for enhancing the mechanical and physical properties of ceramic oxides. …
View article: Coupled electromigration–nanoindentation study on dislocation nucleation in SrTiO <sub>3</sub>
Coupled electromigration–nanoindentation study on dislocation nucleation in SrTiO <sub>3</sub> Open
Modern functional oxides are mainly engineered by doping, essentially by tuning the defect chemistry. Recent studies suggest that dislocations offer a new perspective for enhancing the mechanical and physical properties of ceramic oxides. …
View article: The role of electron-beam irradiation on small-scale deformation: Challenges and benefits in in situ SEM indentation tests
The role of electron-beam irradiation on small-scale deformation: Challenges and benefits in in situ SEM indentation tests Open
In situ mechanical testing has led to a huge development and increase in our scientific insights in the small-scale deformation behavior of many material systems. The in situ mechanical testing approaches were enabled via the advance of mo…
View article: Interfacial Effects of Surface Roughness and Topography on the Bond Strength of Silver-Sintered Joints on Copper Substrates
Interfacial Effects of Surface Roughness and Topography on the Bond Strength of Silver-Sintered Joints on Copper Substrates Open
The increasing focus on renewable energy and electromobility is driving advancements in power electronics devices, with the industry increasingly utilizing wide-bandgap semiconductors and alternative interconnect technologies such as silve…
View article: Local crack suppression and activation of plastic flow via electron irradiation in oxide glasses
Local crack suppression and activation of plastic flow via electron irradiation in oxide glasses Open
The present study demonstrates the potential of electron irradiation for local modification of the mechanical behavior of oxide glasses via In-SEM nanoindentation. The experiments were performed with cube-corner indenter tip under various …
View article: Hard magnetic SmCo5-Sn nanocomposites produced by high-pressure torsion
Hard magnetic SmCo5-Sn nanocomposites produced by high-pressure torsion Open
High-pressure torsion of powder blends is used as an unconventional process route for the production of textured magnetic SmCo5-20 wt% Sn nanocomposites. The use of powders as precursors which get consolidated by the process, enables to ov…
View article: Seamless Science: Lifting Experimental Mechanical Testing Lab Data to an Interoperable Semantic Representation
Seamless Science: Lifting Experimental Mechanical Testing Lab Data to an Interoperable Semantic Representation Open
The scientific landscape is undergoing rapid transformations with the advent of the digital age which revolutionizes research methodologies. In materials science and engineering, an adoption of modern data management techniques is desirabl…
View article: Boosting Coercivity of 3D Printed Hard Magnets through Nano‐Modification of the Powder Feedstock
Boosting Coercivity of 3D Printed Hard Magnets through Nano‐Modification of the Powder Feedstock Open
The demand for strong, compact permanent magnets essential for the energy transition drives innovation in magnet manufacturing. Additive manufacturing, particularly Powder Bed Fusion of metals using a laser beam (PBF‐LB/M), offers potentia…
View article: Influence of printing parameters on part density in L-BPF of Ti-6Al-4V and correlation with static mechanical properties measured using indentation testing
Influence of printing parameters on part density in L-BPF of Ti-6Al-4V and correlation with static mechanical properties measured using indentation testing Open
A complete workflow of parameter development and process qualification of a part manufactured using laser powder bed fusion (L-PBF) AM technique requires data of porosity, pore morphology, distortion and static mechanical properties. Using…
View article: Harvesting room-temperature plasticity in ceramics by mechanically seeded dislocations
Harvesting room-temperature plasticity in ceramics by mechanically seeded dislocations Open
The quest for room-temperature ductile ceramics has been repeatedly fueled by hopes for large-scale applications but so far has been not successful. Recent demonstrations of enhanced functional properties in ceramics through judicious disl…
View article: Observation of Grain Boundary Sliding in a Lamellar Ultrafine‐Grained Steel
Observation of Grain Boundary Sliding in a Lamellar Ultrafine‐Grained Steel Open
The deformation behavior of a ferrite steel with ultrafine‐grained (UFG) lamellar microstructure generated by linear flow splitting is investigated and compared to a coarser cold‐worked reference state, using a set of complementary local d…
View article: Severe plastic deformation for producing superfunctional ultrafine-grained and heterostructured materials: An interdisciplinary review
Severe plastic deformation for producing superfunctional ultrafine-grained and heterostructured materials: An interdisciplinary review Open
Ultrafine-grained and heterostructured materials are currently of high interest due to their superior mechanical and functional properties. Severe plastic deformation (SPD) is one of the most effective methods to produce such materials wit…
View article: Large-angle Lorentz 4D-STEM for Simultaneous Magnetic and Atomic Structure Mapping
Large-angle Lorentz 4D-STEM for Simultaneous Magnetic and Atomic Structure Mapping Open
Achieving a correlative measurement of both magnetic and atomic structures at the nanoscale is imperative to understand the fundamental magnetism of matters and for fostering the development of new magnetic nanomaterials. Conventional micr…
View article: Simultaneous mapping of magnetic and atomic structure for direct visualization of nanoscale magnetoelastic coupling
Simultaneous mapping of magnetic and atomic structure for direct visualization of nanoscale magnetoelastic coupling Open
Achieving a correlative measurement of both magnetic and atomic structures at the nanoscale is imperative to understand the fundamental magnetism of matters and for fostering the development of new magnetic nanomaterials. Conventional micr…
View article: Location and morphology of ferromagnetic precipitates in Ni-Mn-Sn
Location and morphology of ferromagnetic precipitates in Ni-Mn-Sn Open
${\mathrm{Ni}}_{50}{\mathrm{Mn}}_{45}{\mathrm{Sn}}_{05}$ heated above 600 K decomposes into ferromagnetic ${\mathrm{Ni}}_{2}\mathrm{MnSn}$ precipitates in an antiferromagnetic NiMn matrix. If an external magnetic field is applied during an…
View article: Influence of Colloidal Additivation with Surfactant‐Free Laser‐Generated Metal Nanoparticles on the Microstructure of Suction‐Cast Nd–Fe–B Alloy
Influence of Colloidal Additivation with Surfactant‐Free Laser‐Generated Metal Nanoparticles on the Microstructure of Suction‐Cast Nd–Fe–B Alloy Open
Development of new powder feedstocks using nanoparticles (NPs) has the potential to influence the microstructure of as‐built parts and overcome the limitations of current powder‐based additive manufacturing (AM) techniques. The focus of th…
View article: Investigation of the strain rate sensitivity of CoCrFeMnNiTix (x = 0, 0.3) high-entropy alloys using the shear punch test
Investigation of the strain rate sensitivity of CoCrFeMnNiTix (x = 0, 0.3) high-entropy alloys using the shear punch test Open
High entropy alloys (HEAs) are a novel class of metallic materials that exhibit a unique blend of properties due to their chemical composition and atomic arrangement. This research aims to investigate the strain rate sensitivity (SRS) of t…
View article: Towards engineering the perfect defect in high-performing permanent magnets
Towards engineering the perfect defect in high-performing permanent magnets Open
Permanent magnets draw their properties from a complex interplay, across multiple length scales, of the composition and distribution of their constituting phases, that act as building blocks, each with their associated intrinsic properties…