@article{34000,
abstract = {{Abstract
This paper presents the characterization of the microstructure evolution during flow forming of austenitic stainless steel AISI 304L. Due to plastic deformation of metastable austenitic steel, phase transformation from γ-austenite into α’-martensite occurs. This is initiated by the formation of shear bands as product of the external stresses. By means of coupled microscopic and micromagnetic investigations, a characterization of the microstructure was carried out. In particular, this study shows the distribution of the strain-induced α’-martensite and its influence on material properties like hardness at different depths. The microstructural analyses by means of electron backscattered diffraction (EBSD) technique, evidence a higher amount of α’-martensite (ca. 23 %) close to the outer specimen surface, where the plastic deformation and the direct contact with the forming tool take place. In the middle area (ca. 1.5 mm depth from the outer surface), the portion of transformed α’-martensite drops to 7 % and in the inner surface to 2 %. These results are well correlated with microhardness and micromagnetic measurements at different depths. EBSD and atomic force microscopy (AFM) were used to make a detailed characterization of the topography and degree of deformation of the shear bands. Likewise, the mechanisms of nucleation of α’-martensite were discussed. This research contributes to the development of micromagnetic sensors to monitor the evolution of properties during flow forming. This makes them more suitable for closed-loop property control, which offers possibilities for an application-oriented and more efficient production.}},
author = {{Rozo Vasquez, Julian and Kanagarajah, Hanigah and Arian, Bahman and Kersting, Lukas and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}},
issn = {{2195-8599}},
journal = {{Practical Metallography}},
keywords = {{Metals and Alloys, Mechanics of Materials, Condensed Matter Physics, Electronic, Optical and Magnetic Materials}},
number = {{11}},
pages = {{660--675}},
publisher = {{Walter de Gruyter GmbH}},
title = {{{Coupled microscopic and micromagnetic depth-specific analysis of plastic deformation and phase transformation of metastable austenitic steel AISI 304L by flow forming}}},
doi = {{10.1515/pm-2022-0064}},
volume = {{59}},
year = {{2022}},
}
@article{44469,
author = {{Menge, Dennis and Schmid, Hans-Joachim}},
issn = {{1022-1360}},
journal = {{Macromolecular Symposia}},
keywords = {{Materials Chemistry, Polymers and Plastics, Organic Chemistry, Condensed Matter Physics}},
number = {{1}},
publisher = {{Wiley}},
title = {{{Low Temperature Laser Sintering with PA12 and PA6 on a Standard System}}},
doi = {{10.1002/masy.202100397}},
volume = {{404}},
year = {{2022}},
}
@article{46479,
author = {{Bobzin, K. and Kalscheuer, C. and Grundmeier, Guido and Kollmann, S. and Carlet, M. and de los Arcos de Pedro, Maria Teresa}},
issn = {{0257-8972}},
journal = {{Surface and Coatings Technology}},
keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Condensed Matter Physics, General Chemistry}},
publisher = {{Elsevier BV}},
title = {{{Oxidation stability of chromium aluminum oxynitride hard coatings}}},
doi = {{10.1016/j.surfcoat.2022.128927}},
volume = {{449}},
year = {{2022}},
}
@article{37713,
author = {{Murzakhanov, Fadis F. and Mamin, Georgy Vladimirovich and Orlinskii, Sergei Borisovich and Gerstmann, Uwe and Schmidt, Wolf Gero and Biktagirov, Timur and Aharonovich, Igor and Gottscholl, Andreas and Sperlich, Andreas and Dyakonov, Vladimir and Soltamov, Victor A.}},
issn = {{1530-6984}},
journal = {{Nano Letters}},
keywords = {{Mechanical Engineering, Condensed Matter Physics, General Materials Science, General Chemistry, Bioengineering}},
number = {{7}},
pages = {{2718--2724}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Electron–Nuclear Coherent Coupling and Nuclear Spin Readout through Optically Polarized VB– Spin States in hBN}}},
doi = {{10.1021/acs.nanolett.1c04610}},
volume = {{22}},
year = {{2022}},
}
@article{36332,
abstract = {{AlSi casting alloys combine excellent castability with high strength. Hence, this group of alloys is often used in the automotive sector. The challenge for this application is the brittle character of these alloys which leads to cracks during joint formation when mechanical joining technologies are used. A rise in ductility can be achieved by a considerable increase in the solidification rate which results in grain refinement. High solidification rates can be realized in twin–roll casting (TRC) by water-cooled rolls. Therefore, a hypoeutectic EN AC–AlSi9 (for European Norm - aluminum cast product) is manufactured by the TRC process and analyzed. Subsequently, joining investigations are performed on castings in as-cast and heat-treated condition using the self-piercing riveting process considering the joint formation and the load-bearing capacity. Due to the fine microstructure, the crack initiation can be avoided during joining, while maintaining the joining parameters, especially by specimens in heat treatment conditions. Furthermore, due to the extremely fine microstructure, the load-bearing capacity of the joint can be significantly increased in terms of the maximum load-bearing force and the energy absorbed.}},
author = {{Neuser, Moritz and Kappe, Fabian and Ostermeier, Jakob and Krüger, Jan Tobias and Bobbert, Mathias and Meschut, Gerson and Schaper, Mirko and Grydin, Olexandr}},
issn = {{1438-1656}},
journal = {{Advanced Engineering Materials}},
keywords = {{Condensed Matter Physics, General Materials Science}},
number = {{10}},
publisher = {{Wiley}},
title = {{{Mechanical Properties and Joinability of AlSi9 Alloy Manufactured by Twin‐Roll Casting}}},
doi = {{10.1002/adem.202200874}},
volume = {{24}},
year = {{2022}},
}
@article{29168,
abstract = {{AbstractThe homogeneous density of the liquid phase is experimentally investigated for methyl diethanolamine. Data are obtained along five isotherms in a temperature range between 300 K and 360 K for pressures up to 95 MPa. Two different apparatuses are used to measure the speed of sound for the temperatures between 322 K and 450 K with a maximum pressure of 95 MPa. These measurements and literature data are used to develop a fundamental equation of state for methyl diethanolamine. The model is formulated in terms of the Helmholtz energy and allows for the calculation of all thermodynamic properties in gaseous, liquid, supercritical, and saturation states. The experimental data are represented within their uncertainties. The physical and extrapolation behavior is validated qualitatively to ensure reasonable calculations outside of the range of validity. Based on the experimental datasets, the equation of state is valid for temperatures from 250 K to 750 K and pressures up to 100 MPa.}},
author = {{Neumann, Tobias and Baumhögger, Elmar and Span, Roland and Vrabec, Jadran and Thol, Monika}},
issn = {{0195-928X}},
journal = {{International Journal of Thermophysics}},
keywords = {{Condensed Matter Physics}},
number = {{1}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Thermodynamic Properties of Methyl Diethanolamine}}},
doi = {{10.1007/s10765-021-02933-7}},
volume = {{43}},
year = {{2021}},
}
@article{34647,
author = {{Brögelmann, T and Bobzin, K and Grundmeier, Guido and de los Arcos, T and Kruppe, N C and Schwiderek, S and Carlet, M}},
issn = {{0022-3727}},
journal = {{Journal of Physics D: Applied Physics}},
keywords = {{Surfaces, Coatings and Films, Acoustics and Ultrasonics, Condensed Matter Physics, Electronic, Optical and Magnetic Materials}},
number = {{3}},
publisher = {{IOP Publishing}},
title = {{{Durability of nanolayer Ti–Al–O–N hard coatings under simulated polycarbonate melt processing conditions}}},
doi = {{10.1088/1361-6463/ac2e31}},
volume = {{55}},
year = {{2021}},
}
@article{34645,
author = {{Tripathi, Tripurari Sharan and Wilken, Martin and Hoppe, Christian and de los Arcos, Teresa and Grundmeier, Guido and Devi, Anjana and Karppinen, Maarit}},
issn = {{1438-1656}},
journal = {{Advanced Engineering Materials}},
keywords = {{Condensed Matter Physics, General Materials Science}},
number = {{10}},
publisher = {{Wiley}},
title = {{{Atomic Layer Deposition of Copper Metal Films from Cu(acac) 2 and Hydroquinone Reductant}}},
doi = {{10.1002/adem.202100446}},
volume = {{23}},
year = {{2021}},
}
@article{33587,
abstract = {{Abstract
We performed a virtual materials screening to identify promising topological materials for photocatalytic water splitting under visible light irradiation. Topological compounds were screened based on band gap, band edge energy, and thermodynamics stability criteria. In addition, topological types for our final candidates were computed based on electronic structures calculated usingthe hybrid density functional theory including exact Hartree–Fock exchange. Our final list contains materials which have band gaps between 1.0 and 2.7 eV in addition to band edge energies suitable for water oxidation and reduction. However, the topological types of these compounds calculated with the hybrid functional differ from those reported previously. To that end, we discuss the importance of computational methods for the calculation of atomic and electronic structures in materials screening processes.}},
author = {{Ranjbar, Ahmad and Mirhosseini, Hossein and Kühne, Thomas D}},
issn = {{2515-7639}},
journal = {{Journal of Physics: Materials}},
keywords = {{Condensed Matter Physics, General Materials Science, Atomic and Molecular Physics, and Optics}},
number = {{1}},
publisher = {{IOP Publishing}},
title = {{{On topological materials as photocatalysts for water splitting by visible light}}},
doi = {{10.1088/2515-7639/ac363d}},
volume = {{5}},
year = {{2021}},
}
@article{33659,
abstract = {{Abstract
We performed a virtual materials screening to identify promising topological materials for photocatalytic water splitting under visible light irradiation. Topological compounds were screened based on band gap, band edge energy, and thermodynamics stability criteria. In addition, topological types for our final candidates were computed based on electronic structures calculated usingthe hybrid density functional theory including exact Hartree–Fock exchange. Our final list contains materials which have band gaps between 1.0 and 2.7 eV in addition to band edge energies suitable for water oxidation and reduction. However, the topological types of these compounds calculated with the hybrid functional differ from those reported previously. To that end, we discuss the importance of computational methods for the calculation of atomic and electronic structures in materials screening processes.}},
author = {{Ranjbar, Ahmad and Mirhosseini, Hossein and Kühne, Thomas}},
issn = {{2515-7639}},
journal = {{Journal of Physics: Materials}},
keywords = {{Condensed Matter Physics, General Materials Science, Atomic and Molecular Physics, and Optics}},
number = {{1}},
publisher = {{IOP Publishing}},
title = {{{On topological materials as photocatalysts for water splitting by visible light}}},
doi = {{10.1088/2515-7639/ac363d}},
volume = {{5}},
year = {{2021}},
}
@article{35327,
author = {{Wortmann, Martin and Viertel, Klaus and Welle, Alexander and Keil, Waldemar and Frese, Natalie and Hachmann, Wiebke and Krieger, Philipp and Brikmann, Johannes and Schmidt, Claudia and Moritzer, Elmar and Hüsgen, Bruno}},
issn = {{0017-9310}},
journal = {{International Journal of Heat and Mass Transfer}},
keywords = {{Fluid Flow and Transfer Processes, Mechanical Engineering, Condensed Matter Physics}},
publisher = {{Elsevier BV}},
title = {{{Anomalous bulk diffusion of methylene diphenyl diisocyanate in silicone elastomer}}},
doi = {{10.1016/j.ijheatmasstransfer.2021.121536}},
volume = {{177}},
year = {{2021}},
}
@article{47963,
abstract = {{Nonlinear and quantum optical devices based on periodically-poled thin film lithium niobate (PP-TFLN) have gained considerable interest lately, due to their significantly improved performance as compared to their bulk counterparts. Nevertheless, performance parameters such as conversion efficiency, minimum pump power, and spectral bandwidth strongly depend on the quality of the domain structure in these PP-TFLN samples, e.g., their homogeneity and duty cycle, as well as on the overlap and penetration depth of domains with the waveguide mode. Hence, in order to propose improved fabrication protocols, a profound quality control of domain structures is needed that allows quantifying and thoroughly analyzing these parameters. In this paper, we propose to combine a set of nanometer-to-micrometer-scale imaging techniques, i.e., piezoresponse force microscopy (PFM), second-harmonic generation (SHG), and Raman spectroscopy (RS), to access the relevant and crucial sample properties through cross-correlating these methods. Based on our findings, we designate SHG to be the best-suited standard imaging technique for this purpose, in particular when investigating the domain poling process in x-cut TFLNs. While PFM is excellently recommended for near-surface high-resolution imaging, RS provides thorough insights into stress and/or defect distributions, as associated with these domain structures. In this context, our work here indicates unexpectedly large signs for internal fields occurring in x-cut PP-TFLNs that are substantially larger as compared to previous observations in bulk LN.}},
author = {{Reitzig, Sven and Rüsing, Michael and Zhao, Jie and Kirbus, Benjamin and Mookherjea, Shayan and Eng, Lukas M.}},
issn = {{2073-4352}},
journal = {{Crystals}},
keywords = {{Inorganic Chemistry, Condensed Matter Physics, General Materials Science, General Chemical Engineering}},
number = {{3}},
publisher = {{MDPI AG}},
title = {{{“Seeing Is Believing”—In-Depth Analysis by Co-Imaging of Periodically-Poled X-Cut Lithium Niobate Thin Films}}},
doi = {{10.3390/cryst11030288}},
volume = {{11}},
year = {{2021}},
}
@article{47964,
abstract = {{In the last two decades, variably doped strontium barium niobate (SBN) has attracted a lot of scientific interest mainly due to its specific non-linear optical response. Comparably, the parental compound, i.e., undoped SBN, appears to be less studied so far. Here, two different cuts of single-crystalline nominally pure strontium barium niobate in the composition Sr0.61Ba0.39Nb2O6 (SBN61) are comprehensively studied and analyzed with regard to their photoconductive responses. We present conductance measurements under systematically varied illumination conditions along either the polar z-axis or perpendicular to it (x-cut). Apart from a pronounced photoconductance (PC) already under daylight and a large effect upon super-bandgap illumination in general, we observe (i) distinct spectral features when sweeping the excitation wavelength over the sub-bandgap region as then discussed in the context of deep and shallow trap states, (ii) extremely slow long-term relaxation for both light-on and light-off transients in the range of hours and days, (iii) a critical dependence of the photoresponse on the pre-illumination history of the sample, and (iv) a current–voltage hysteresis depending on both the illumination and the electrical-measurement conditions in a complex manner.}},
author = {{Beyreuther, Elke and Ratzenberger, Julius and Roeper, Matthias and Kirbus, Benjamin and Rüsing, Michael and Ivleva, Liudmila I. and Eng, Lukas M.}},
issn = {{2073-4352}},
journal = {{Crystals}},
keywords = {{Inorganic Chemistry, Condensed Matter Physics, General Materials Science, General Chemical Engineering}},
number = {{7}},
publisher = {{MDPI AG}},
title = {{{Photoconduction of Polar and Nonpolar Cuts of Undoped Sr0.61Ba0.39Nb2O6 Single Crystals}}},
doi = {{10.3390/cryst11070780}},
volume = {{11}},
year = {{2021}},
}
@article{41817,
abstract = {{Pseudo isocyanine chloride monomers equilibrate with H-oligomers and, separated by a threshold, with H-oligomers and fiber-like J-aggregates. The mechanism and thermodynamics of J-aggregate formation is interpreted with the concept of chain growth.}},
author = {{Hämisch, Benjamin and Huber, Klaus}},
issn = {{1744-683X}},
journal = {{Soft Matter}},
keywords = {{Condensed Matter Physics, General Chemistry}},
number = {{35}},
pages = {{8140--8152}},
publisher = {{Royal Society of Chemistry (RSC)}},
title = {{{Mechanism and equilibrium thermodynamics of H- and J-aggregate formation from pseudo isocyanine chloride in water}}},
doi = {{10.1039/d1sm00979f}},
volume = {{17}},
year = {{2021}},
}
@article{40244,
author = {{Meier, Lukas and Schmidt, Wolf Gero}},
issn = {{0370-1972}},
journal = {{physica status solidi (b)}},
keywords = {{Condensed Matter Physics, Electronic, Optical and Magnetic Materials}},
number = {{1}},
publisher = {{Wiley}},
title = {{{GaInP/AlInP(001) Interfaces from Density Functional Theory}}},
doi = {{10.1002/pssb.202100462}},
volume = {{259}},
year = {{2021}},
}
@article{41511,
author = {{Hein, Maxwell and Hoyer, Kay-Peter and Schaper, Mirko}},
issn = {{0933-5137}},
journal = {{Materialwissenschaft und Werkstofftechnik}},
keywords = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}},
number = {{7}},
pages = {{703--716}},
publisher = {{Wiley}},
title = {{{Additively processed TiAl6Nb7 alloy for biomedical applications}}},
doi = {{10.1002/mawe.202000288}},
volume = {{52}},
year = {{2021}},
}
@article{41516,
author = {{Tillmann, Wolfgang and Lopes Dias, Nelson Filipe and Franke, Carlo and Kokalj, David and Stangier, Dominic and Filor, Viviane and Mateus-Vargas, Rafael Hernán and Oltmanns, Hilke and Kietzmann, Manfred and Meißner, Jessica and Hein, Maxwell and Pramanik, Sudipta and Hoyer, Kay-Peter and Schaper, Mirko and Nienhaus, Alexander and Thomann, Carl Arne and Debus, Jörg}},
issn = {{0257-8972}},
journal = {{Surface and Coatings Technology}},
keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Condensed Matter Physics, General Chemistry}},
publisher = {{Elsevier BV}},
title = {{{Tribo-mechanical properties and biocompatibility of Ag-containing amorphous carbon films deposited onto Ti6Al4V}}},
doi = {{10.1016/j.surfcoat.2021.127384}},
volume = {{421}},
year = {{2021}},
}
@article{41512,
author = {{Andreiev, Anatolii and Hoyer, Kay-Peter and Dula, Dimitri and Hengsbach, Florian and Grydin, Olexandr and Frolov, Yaroslav and Schaper, Mirko}},
issn = {{0921-5093}},
journal = {{Materials Science and Engineering: A}},
keywords = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}},
publisher = {{Elsevier BV}},
title = {{{Laser beam melting of functionally graded materials with application-adapted tailoring of magnetic and mechanical performance}}},
doi = {{10.1016/j.msea.2021.141662}},
volume = {{822}},
year = {{2021}},
}
@article{41509,
author = {{Krüger, Jan Tobias and Hoyer, Kay-Peter and Schaper, Mirko}},
issn = {{0167-577X}},
journal = {{Materials Letters}},
keywords = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}},
publisher = {{Elsevier BV}},
title = {{{Bioresorbable AgCe and AgCeLa alloys for adapted Fe-based implants}}},
doi = {{10.1016/j.matlet.2021.130890}},
volume = {{306}},
year = {{2021}},
}
@article{46017,
author = {{Zhang, Dawei and Luo, Zheng-Dong and Yao, Yin and Schoenherr, Peggy and Sha, Chuhan and Pan, Ying and Sharma, Pankaj and Alexe, Marin and Seidel, Jan}},
issn = {{1530-6984}},
journal = {{Nano Letters}},
keywords = {{Mechanical Engineering, Condensed Matter Physics, General Materials Science, General Chemistry, Bioengineering}},
number = {{2}},
pages = {{995--1002}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Anisotropic Ion Migration and Electronic Conduction in van der Waals Ferroelectric CuInP2S6}}},
doi = {{10.1021/acs.nanolett.0c04023}},
volume = {{21}},
year = {{2021}},
}