R. Maaß
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View article: Robot‐Assisted Automated Serial‐Sectioning and Imaging for 3D Microstructural Investigations
Robot‐Assisted Automated Serial‐Sectioning and Imaging for 3D Microstructural Investigations Open
Comprehensive materials characterization requires precise structural knowledge beyond traditional methods. The robot‐assisted automated serial‐sectioning and imaging (RASI) platform, developed at BAM, provides automated 3D metallographic r…
View article: A bcc refractory high-entropy alloy: the ideal case of smooth plastic flow
A bcc refractory high-entropy alloy: the ideal case of smooth plastic flow Open
Single crystalline metals exhibit correlated dislocation dynamics, irrespective of lattice system. This collective evolution of dislocation structures is intermittent and scale-free, implying divergent length scales that play a critical ro…
View article: Multiferroic Microstructure Created from Invariant Line Constraint
Multiferroic Microstructure Created from Invariant Line Constraint Open
Ferroic materials enable a multitude of emerging applications, and optimum functional properties are achieved when ferromagnetic and ferroelectric properties are coupled to a first‐order ferroelastic transition. In bulk materials, this fir…
View article: Multiferroic Microstructure Created from Invariant Line Constraint
Multiferroic Microstructure Created from Invariant Line Constraint Open
Ferroic materials enable a multitude of emerging applications, and optimum functional properties are achieved when ferromagnetic and ferroelectric properties are coupled to a first-order ferroelastic transition. In bulk materials, this fir…
View article: Microplastic response of 2PP‐printed ceramics
Microplastic response of 2PP‐printed ceramics Open
Two‐photon polymerization (2PP) additive manufacturing (AM) utilizes feedstocks of ceramic nanoparticles of a few nanometers in diameter, enabling the fabrication of highly accurate technical ceramic design with structural details as small…
View article: Small-scale functional fatigue of a Ni-Mn-Ga Heusler alloy
Small-scale functional fatigue of a Ni-Mn-Ga Heusler alloy Open
Functional fatigue of shape-memory alloys is a considerable threat to the reliable service of actuation devices. Here, we demonstrate the essentially degradation-free cyclic phase-transformation behavior of Ni-Mn-Ga microcrystals up to one…
View article: Local lattice distortions and chemical short-range order in MoNbTaW
Local lattice distortions and chemical short-range order in MoNbTaW Open
Extended X-ray absorption fine structure (EXAFS) conducted on an equiatomic MoNbTaW bcc medium-entropy alloy that was annealed at 2273 K reveals unexpectedly small 1st and 2nd shell element-specific lattice distortions. An experimental siz…
View article: Atomic cluster dynamics causes intermittent aging of metallic glasses
Atomic cluster dynamics causes intermittent aging of metallic glasses Open
In the past two decades, numerous relaxation or physical aging experiments of metallic glasses have revealed signatures of intermittent atomic-scale processes. Revealed via intensity cross-correlations from coherent scattering using X-ray …
View article: Giant segregation transition as origin of liquid metal embrittlement in the Fe-Zn system
Giant segregation transition as origin of liquid metal embrittlement in the Fe-Zn system Open
A giant Zn segregation transition is revealed using CALPHAD-integrated density-based modeling of segregation into Fe grain boundaries (GBs). The results show that above a threshold of only a few atomic percent Zn in the alloy, a substantia…
View article: Constrained incipient phase transformation in Ni-Mn-Ga films: A small-scale design challenge
Constrained incipient phase transformation in Ni-Mn-Ga films: A small-scale design challenge Open
Ni-Mn-Ga shape-memory alloys are promising candidates for large strain actuation and magnetocaloric cooling devices. In view of potential small-scale applications, we probe here nanomechanically the stress-induced austenite–martensite tran…
View article: Segregation-induced grain-boundary precipitation during early stages of liquid-metal embrittlement of an advanced high-strength steel
Segregation-induced grain-boundary precipitation during early stages of liquid-metal embrittlement of an advanced high-strength steel Open
Liquid-metal embrittlement (LME) of galvanized (Zn-coated) advanced high-strength steels is a long-known problem in materials science. Here we reveal the initial microstructural processes underneath the Zn-coating that lead to LME-microcra…
View article: Insights into Plastic Localization by Crystallographic Slip from Emerging Experimental and Numerical Approaches
Insights into Plastic Localization by Crystallographic Slip from Emerging Experimental and Numerical Approaches Open
Advanced experimental and numerical approaches are being developed to capture the localization of plasticity at the nanometer scale as a function of the multiscale and heterogeneous microstructure present in metallic materials. These innov…
View article: Giant segregation transition as origin of liquid metal embrittlement in the Fe-Zn system
Giant segregation transition as origin of liquid metal embrittlement in the Fe-Zn system Open
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 threshold of only a few atomic percent Zn in the alloy, a substanti…
View article: Glass fracture surface energy calculated from crystal structure and bond-energy data
Glass fracture surface energy calculated from crystal structure and bond-energy data Open
We present a novel method to predict the fracture surface energy, γ, of isochemically crystallizing silicate glasses using readily available crystallographic structure data of their crystalline counterpart and tabled diatomic chemical bond…
View article: nanoindentation data associated with the publication "On the elastic microstructure of bulk metallic glasses" in Materials&Design 2023
nanoindentation data associated with the publication "On the elastic microstructure of bulk metallic glasses" in Materials&Design 2023 Open
This dataset consists of indentation data measured with a conospherical tip in a Hysitron-Bruker TI980 Nanoindenter on the surface of a Silicon wafer and a polished cross-sectional cut of a Zr65Cu25Al10 bulk metallic glass. It is associat…
View article: nanoindentation data associated with the publication "On the elastic microstructure of bulk metallic glasses" in Materials&Design 2023
nanoindentation data associated with the publication "On the elastic microstructure of bulk metallic glasses" in Materials&Design 2023 Open
This dataset consists of indentation data measured with a conospherical tip in a Hysitron-Bruker TI980 Nanoindenter on the surface of a Silicon wafer and a polished cross-sectional cut of a Zr65Cu25Al10 bulk metallic glass. It is associat…
View article: On the elastic microstructure of bulk metallic glasses
On the elastic microstructure of bulk metallic glasses Open
Funder: \n http://dx.doi.org/10.13039/100018693\n HORIZON EUROPE Framework Programme
View article: Shear-band cavitation determines the shape of the stress-strain curve of metallic glasses
Shear-band cavitation determines the shape of the stress-strain curve of metallic glasses Open
Metallic glasses are known to have a remarkably robust yield strength, admitting Weibull moduli as high as for crystalline engineering alloys. However, their postyielding behavior is strongly varying, with large scatter in both flow stress…
View article: Optimally rejuvenated model binary glasses
Optimally rejuvenated model binary glasses Open
Using the creation relaxation algorithm developed for the atomistic modeling of the high-dose irradiation limit of crystalline systems, we explore the limits of the structural rejuvenation of a highly excited model binary glass. This high-…
View article: Entering a New Dimension in Powder Processing for Advanced Ceramics Shaping
Entering a New Dimension in Powder Processing for Advanced Ceramics Shaping Open
Filigree structures can be manufactured via two‐photon polymerization (2PP) operating in the regime of nonlinear light absorption. For the first time, it is possible to apply this technique to the powder processing of ceramic structures wi…