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Integrity Assessment of Electron-Beam-Welded Joints of Additively Manufactured AlSi10Mg Components
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Laser-based powder bed fusion of metals (PBF-LB/M) is found to be a promising
processing method for the fabrication of components with no limits of complexity
by adding layers upon layers of material. However, drawbacks such as pro-
ductivity and dimension limitations adversely affect the employment of com-
ponents processed by additive manufacturing (AM) in envisaged applications.
This brings welding and joining techniques into play to integrate AM metal parts
into larger assemblies. In the present study, electron beam welding is used to join
the AlSi10Mg specimens, fabricated via two different manufacturing processes,
that is, PBF-LB/M and casting. The main focus is to study the quasistatic and
fatigue behavior of similar and dissimilar welded joints in different combinations,
namely AM–AM, AM–cast, and cast–cast, alongside thorough microstructure
analysis, to investigate the correlation between the microscopic and macroscopic
properties. Dissimilar welded joints demonstrate inferior material strength. This
fact can be attributed to the inherent coarse microstructure of the cast material.
Although similar welded joints of AM components suffer from high porosity in
the weld zone, they are characterized by a better fatigue life, which can be
attributed to the equiaxed eutectic microstructure in the welded area
MORTAR: a rich client application for in silico molecule fragmentation
No full textDeveloping and implementing computational algorithms for the extraction of specific substructures from molecular graphs (in silico molecule fragmentation) is an iterative process. It involves repeated sequences of implementing a rule set, applying it to relevant structural data, checking the results, and adjusting the rules. This requires a computational workflow with data import, fragmentation algorithm integration, and result visualisation. The described workflow is normally unavailable for a new algorithm and must be set up individually. This work presents an open Java rich client Graphical User Interface (GUI) application to support the development of new in silico molecule fragmentation algorithms and make them readily available upon release. The MORTAR (MOlecule fRagmenTAtion fRamework) application visualises fragmentation results of a set of molecules in various ways and provides basic analysis features. Fragmentation algorithms can be integrated and developed within MORTAR by using a specific wrapper class. In addition, fragmentation pipelines with any combination of the available fragmentation methods can be executed. Upon release, three fragmentation algorithms are already integrated: ErtlFunctionalGroupsFinder, Sugar Removal Utility, and Scaffold Generator. These algorithms, as well as all cheminformatics functionalities in MORTAR, are implemented based on the Chemistry Development Kit (CDK)
Datenstrukturen und digitaler Zwilling - Konzeption einer Mikroklima-Analyse und Steuerung für die Stadt Gelsenkirchen
No full textDurch den digitalen Wandel haben Kommunen neue Entwicklungsmöglichkeiten im Bereich der Smart City. Diese Arbeit stellt eine Übersicht darüber dar, wie mithilfe von IoT, Big Data, Datenbanken, Digitalen Zwillingen und weiteren Technologien, eine Mikroklima-Analyse und Steuerung ermöglicht werden kann
Aktivlegitimation für Anspruch auf Erstattung der Flugscheinkosten besteht unabhängig von der Stellung als Vertragspartner des Beförderungsvertrags. BGH, 27.9.2022 - X ZR 35/22
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Anmerkung zu EuGH, Urteil vom 15.6.2023 – C-132/22 (Arbeitsrecht: Anerkennung ausländischer Berufserfahrung - Aufnahme in Einstellungsliste öffentlicher Hochschuleinrichtungen)
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The German Supply Chain Law: A First Step Towards More Corporate Sustainability
No full textThe German supply chain law ( Lieferkettensorgfaltspflichtengesetz, abbreviated: LkSG) which enters into force on 1 January 2023 is part of the developing legal framework for human rights in global supply chains. Like the French vigilance law, it represents a new generation of supply chain laws which impose mandatory human rights due diligence obligations. The LkSG requires enterprises to exercise a number of due diligence obligations – from conducting risk analysis to undertaking preventive measures or remedial actions. The law is based on public enforcement via a competent authority, the Federal Office for Economic Affairs and Export Control (BAFA). The BAFA monitors and enforces compliance with the due diligence obligations. Non-compliant enterprises can be fined with up to 800,000 Euros and, in some cases, up to 2% of the annual turnover. Whilst the LkSG is an important step towards achieving greater corporate sustainability, it also has limitations. It was a political compromise and, as such, it does not include a new civil liability for non-compliance. Moreover, by default, it only applies to the enterprise’s own business area and its direct suppliers, whereas indirect suppliers are only included where the enterprise has substantiated knowledge that an obligation has been violated