@article{24009,
abstract = {{Heat-assisted forming processes are becoming increasingly important in the manufacturing of sheet metal parts for body-in-white applications. However, the non-isothermal nature of these processes leads to challenges in evaluating the forming limits, since established methods such as Forming Limit Curves (FLCs) only allow the assessment of critical forming strains for steady temperatures. For this reason, a temperature-dependent extension of the well-established GISSMO (Generalized Incremental Stress State Dependent Damage Model) fracture indicator framework is developed by the authors to predict forming failures under non-isothermal conditions. In this paper, a general approach to combine several isothermal FLCs within the temperature-extended GISSMO model into a temperature-dependent forming limit surface is investigated. The general capabilities of the model are tested in a coupled thermo-mechanical FEA using the example of warm forming of an AA5182-O sheet metal cross-die cup. The obtained results are then compared with state of the art of evaluation methods. By taking the strain and temperature path into account, GISSMO predicts greater drawing depths by up to 20% than established methods. In this way the forming and so the lightweight potential of sheet metal parts can by fully exploited. Moreover, the risk and locus of failure can be evaluated directly on the part geometry by a contour plot. An additional advantage of the GISSMO model is the applicability for low triaxialities as well as the possibility to predict the materials behavior beyond necking up to ductile fracture.}},
author = {{Camberg, Alan Adam and Erhart, Tobias and Tröster, Thomas}},
issn = {{1996-1944}},
journal = {{Materials}},
title = {{{A Generalized Stress State and Temperature Dependent Damage Indicator Framework for Ductile Failure Prediction in Heat-Assisted Forming Operations}}},
doi = {{10.3390/ma14175106}},
year = {{2021}},
}
@misc{45254,
author = {{Anonymous, Anonymous}},
title = {{{Device-Independent Security Proofs Via Entropy Accumulation}}},
year = {{2021}},
}
@inbook{42253,
author = {{Saad, Nadia}},
booktitle = {{Methoden der Darstellung und Analyse interreligiöser Diskurse}},
pages = {{354--355}},
publisher = {{Ergon Verlag}},
title = {{{David und Salomo im Koran: ein Komparativ-theologischer Ansatz}}},
volume = {{1}},
year = {{2021}},
}
@article{42256,
author = {{Mir Sadri, Seyedeh Saeideh and Nasiri, Mansour}},
journal = {{Philosophy East and West}},
number = {{2}},
pages = {{414--430}},
publisher = {{University of Hawai'i Press}},
title = {{{Reading Iqbal in the Light of Kierkegaard; towards an Existentialist Approach to Islam}}},
volume = {{71}},
year = {{2021}},
}
@article{42257,
author = {{Mir Sadri, Seyedeh Saeideh}},
journal = {{Amos-international}},
number = {{1}},
pages = {{27--35}},
title = {{{Fratelli e sorelle tutti. Die Sozialenzyklika aus islamischer Sicht}}},
volume = {{15}},
year = {{2021}},
}
@inbook{45275,
author = {{Eikermann, Larissa}},
booktitle = {{Das Erbe der Kinder: Provenienzforschung und Sammlungsgeschichte von Kinder- und Jugendzeichnungen: Museen, Archive, private Kollektionen und "verschwundene Sammlungen" = The children's heritage: provenance research and the history of children's and youth drawings collections: museums, archives, private holdings and "lost collections"}},
editor = {{Ströter-Bender, Jutta}},
isbn = {{9783828876668}},
pages = {{103--112}},
publisher = {{Tectum Verlag}},
title = {{{"Ein altes Familientalent" - Kinderzeichnungen aus der Familie der Brüder Grimm (1. Hälfte 19. Jh.) in der Grimm-Sammlung der Stadt Kassel. Germany}}},
doi = {{10.5771/9783828876668}},
volume = {{Bd. 30}},
year = {{2021}},
}
@inbook{45276,
author = {{Eikermann, Larissa}},
booktitle = {{Das Erbe der Kinder: Provenienzforschung und Sammlungsgeschichte von Kinder- und Jugendzeichnungen: Museen, Archive, private Kollektionen und "verschwundene Sammlungen" = The children's heritage: provenance research and the history of children's and youth drawings collections: museums, archives, private holdings and "lost collections"}},
editor = {{Ströter-Bender, Jutta}},
isbn = {{9783828876668}},
pages = {{171--179}},
publisher = {{Tectum Verlag}},
title = {{{Children´s drawings on Pippi & Co. - A visit to the Astrid Lindgren Archive in the Royal Library of Stockholm. Sweden}}},
doi = {{10.5771/9783828876668}},
volume = {{Bd. 30}},
year = {{2021}},
}
@inbook{42096,
author = {{Kamcili-Yildiz, Naciye}},
booktitle = {{Interreligiöse Öffnung durch Begegnung. Grundlagen - Erfahrungen - Perspektiven im Kontext des christlich-islamischen Dialogs}},
editor = {{Espelage, Christian and Mohagheghi, Hamideh and Schober, Michael}},
pages = {{301 -- 310}},
publisher = {{Universitätsverlag Hildesheim, Georg Olms Verlag}},
title = {{{Begegnungslernen in den Kerncurricula des islamischen Religionsunterrichts}}},
volume = {{43}},
year = {{2021}},
}
@book{42058,
author = {{Kamcili-Yildiz, Naciye}},
isbn = {{973-3830942958}},
publisher = {{Waxmann Verlag}},
title = {{{Zwischen Glaubensvermittlung und Reflexivität: Eine quantitative Studie zu professionellen Kompetenzen von islamischen ReligionslehrerInnen}}},
volume = {{682}},
year = {{2021}},
}
@article{42265,
author = {{Mustafa, Abdul Rahman}},
journal = {{Political Theology}},
number = {{8}},
pages = {{699--719}},
publisher = {{Taylor and Francis}},
title = {{{Supernatural, Unnatural, Queer: Gratitude and Nature in Islamic Political Theology}}},
volume = {{22}},
year = {{2021}},
}
@article{42224,
author = {{Aghaei Abrandabadi, Seyed Ali and Marx, Michel}},
journal = {{Journal of Iranian National Museum}},
number = {{1}},
pages = {{205--226}},
title = {{{Carbon Dating of Seven Parchment Qurʾān Manuscripts and One Syriac Bible of the National Museum of Iran}}},
volume = {{2}},
year = {{2021}},
}
@inbook{37120,
author = {{Tatari, Muna}},
booktitle = {{Islamische Theologie in Deutschland. Ein Modell für Europa und die Welt}},
editor = {{Khalfaoui, Mouez and Ehret, Jean}},
isbn = {{9783451391439}},
pages = {{192 -- 209}},
publisher = {{Herder}},
title = {{{Islamische systematische Theologie in Deutschland: Konturen eines jungen Faches}}},
year = {{2021}},
}
@book{37035,
author = {{Tatari, Muna and von Stosch, Klaus}},
isbn = {{3451389649}},
pages = {{432}},
publisher = {{Herder}},
title = {{{Prophetin - Jungfrau - Mutter: Maria im Koran}}},
year = {{2021}},
}
@misc{42479,
author = {{Nassery, Idris}},
booktitle = {{Frankfurter Allgemeine Zeitung}},
title = {{{Die unerwünschte Empfehlung, Hybris: Woran der Westen in Afghanistan tatsächlich gescheitert ist}}},
year = {{2021}},
}
@inproceedings{45407,
author = {{Große-Heilmann, Rike Isabel and Burde, Jan-Philipp and Riese, Josef and Schubatzky, Thomas and Weiler, David}},
booktitle = {{PhyDid B-Didaktik der Physik-Beiträge zur DPG-Frühjahrstagung 2021}},
pages = {{171--178}},
title = {{{Erwerb und Messung physikdidaktischer Kompetenzen zum Einsatz digitaler Medien}}},
year = {{2021}},
}
@inproceedings{45408,
author = {{Weiler, David and Burde, Jan-Philipp and Große-Heilmann, Rike Isabel and Lachner, Andreas and Riese, Josef and Schubatzky, Thomas}},
booktitle = {{PhyDid B-Didaktik der Physik-Beiträge zur DPG-Frühjahrstagung 2021}},
pages = {{209--216}},
title = {{{Entwicklung eines Seminars zur Förderung des Konzeptverständnisses mittels digitaler Medien}}},
year = {{2021}},
}
@inbook{45436,
author = {{Haghani Fazl, Mohammad}},
booktitle = {{Impeccability and Temptation: Understanding Christ's Divine and Human Will}},
editor = {{Grössl, Johannes and von Stosch, Klaus}},
pages = {{235--252}},
publisher = {{Routledge Verlag}},
title = {{{The Scope of ‘iṣma and Qur’anic Evidence}}},
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{41507,
abstract = {{
Purpose
The currently existing restrictions regarding the deployment of additively manufactured components because of poor surface roughness, porosity and residual stresses as well as their influence on the low-cycle fatigue (LCF) strength are addressed in this paper.
Design/methodology/approach
This study aims to evaluating the effect of different pre- and post-treatments on the LCF strength of additively manufactured 316L parts. Therefore, 316L specimens manufactured by laser powder bed fusion were examined in their as-built state as well as after grinding, or coating with regard to the surface roughness, residual stresses and LCF strength. To differentiate between topographical effects and residual stress-related phenomena, stress-relieved 316L specimens served as a reference throughout the investigations. To enable an alumina coating of the 316L components, atmospheric plasma spraying was used, and the near-surface residual stresses and the surface roughness are measured and investigated.
Findings
The results have shown that the applied pre- and post-treatments such as stress-relief heat treatment, grinding and alumina coating have each led to an increase in LCF strength of the 316L specimens. In contrast, the non-heat-treated specimens predominantly exhibited coating delamination.
Originality/value
To the best of the authors’ knowledge, this is the first study of the correlation between the LCF behavior of additively manufactured uncoated 316L specimens in comparison with additively manufactured 316L specimens with an alumina coating.
}},
author = {{Garthe, Kai-Uwe and Hoyer, Kay-Peter and Hagen, Leif and Tillmann, Wolfgang and Schaper, Mirko}},
issn = {{1355-2546}},
journal = {{Rapid Prototyping Journal}},
keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering}},
number = {{5}},
pages = {{833--840}},
publisher = {{Emerald}},
title = {{{Correlation between pre- and post-treatments of additively manufactured 316L parts and the resulting low cycle fatigue behavior}}},
doi = {{10.1108/rpj-01-2021-0017}},
volume = {{28}},
year = {{2021}},
}
@article{41506,
abstract = {{Processing aluminum alloys employing powder bed fusion of metals (PBF-LB/M) is becoming more attractive for the industry, especially if lightweight applications are needed. Unfortunately, high-strength aluminum alloys such as AA7075 are prone to hot cracking during PBF-LB/M, as well as welding. Both a large solidification range promoted by the alloying elements zinc and copper and a high thermal gradient accompanied with the manufacturing process conditions lead to or favor hot cracking. In the present study, a simple method for modifying the powder surface with titanium carbide nanoparticles (NPs) as a nucleating agent is aimed. The effect on the microstructure with different amounts of the nucleating agent is shown. For the aluminum alloy 7075 with 2.5 ma% titanium carbide nanoparticles, manufactured via PBF-LB/M, crack-free samples with a refined microstructure having no discernible melt pool boundaries and columnar grains are observed. After using a two-step ageing heat treatment, ultimate tensile strengths up to 465 MPa and an 8.9% elongation at break are achieved. Furthermore, it is demonstrated that not all nanoparticles used remain in the melt pool during PBF-LB/M.}},
author = {{Heiland, Steffen and Milkereit, Benjamin and Hoyer, Kay-Peter and Zhuravlev, Evgeny and Kessler, Olaf and Schaper, Mirko}},
issn = {{1996-1944}},
journal = {{Materials}},
keywords = {{General Materials Science}},
number = {{23}},
publisher = {{MDPI AG}},
title = {{{Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts}}},
doi = {{10.3390/ma14237190}},
volume = {{14}},
year = {{2021}},
}