Search

Your search keyword '"Rhode, Michael"' showing total 220 results
Start Over Author "Rhode, Michael"
220 results on '"Rhode, Michael"'

23. Anhang E: Diagramme und Tabellen

Author

Oechsner, Matthias, Berger, Christina, Kloos, Karl-Heinz, Kübler, Michael, Müller, Andreas K., Schürmann, Helmut, Habig, Karl-Heinz, Woydt, Mathias, Böllinghaus, Thomas, Rhode, Michael, Falkenreck, Thora, Grote, Karl-Heinrich, editor, Bender, Beate, editor, and Göhlich, Dietmar, editor

Published
2018
Full Text
View/download PDF

25. Effect of Tensile Loading and Temperature on the Hydrogen Solubility of Steels at High Gas Pressure.

Author

Drexler, Andreas Karl, Konert, Florian, Nietzke, Jonathan, Hodžić, Emir, Pastore, Sergio, Domitner, Josef, Rhode, Michael, Sommitsch, Christof, and Böllinghaus, Thomas

Subjects
SOLUBILITY, LIQUID hydrogen, HYDROSTATIC stress, FERRITIC steel, HYDROGEN
Abstract

The hydrogen solubility in ferritic and martensitic steels is affected by hydrostatic stress, pressure, and temperature. In general, compressive stresses decrease but tensile stresses increase the hydrogen solubility. This important aspect must be considered when qualifying materials for high‐pressure hydrogen applications (e.g., for pipelines or tanks) by using autoclave systems. In this work, a pressure equivalent for compensating the effect of compressive stresses on the hydrogen solubility inside of closed autoclaves is proposed to achieve solubilities that are equivalent to those in pipelines and tanks subjected to tensile stresses. Moreover, it is shown that the temperature effect becomes critical at low temperatures (e.g., under cryogenic conditions for storing liquid hydrogen). Trapping of hydrogen in the microstructure can increase the hydrogen solubility with decreasing temperature, having a solubility minimum at about room temperature. To demonstrate this effect, the generalized law of the hydrogen solubility is parameterized for different steels using measured contents of gaseous hydrogen. The constant parameter sets are verified and critically discussed with respect to the high‐pressure hydrogen experiments. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

36. Influence of Milling Conditions on Al x CoCrFeNiMo y Multi-Principal-Element Alloys.

Author

Delgado Arroyo, Diego, Richter, Tim, Schroepfer, Dirk, Boerner, Andreas, Rhode, Michael, Lindner, Thomas, Preuß, Bianca, and Lampke, Thomas

Subjects
MILLING (Metalwork), MACHINABILITY of metals, ALLOYS, SURFACE finishing, CUTTING force, INDUSTRIALISM, LOW temperatures, TITANIUM alloys
Abstract

Multi-Principal-Element or High-Entropy Alloys (MPEAs/HEAs) have gained increasing interest in the past two decades largely due to their outstanding properties such as superior mechanical strength and corrosion resistance. However, research studies on their processability are still scarce. This work assesses the effect of different machining conditions on the machinability of these novel alloys, with the objective of advancing the introduction of MPEA systems into industrial applications. The present study focuses on the experimental analysis of finish-milling conditions and their effects on the milling process and resulting surface finish of CoCrFeNi, Al0.3CoCrFeNi and Al0.3CoCrFeNiMo0.2 alloys fabricated via Spark Plasma Sintering. Ball-nose-end milling experiments have been carried out various milling parameters such as cutting speed, feed per cutting edge, and ultrasonic assistance. In situ measurements of cutting forces and temperature on the tool edge were performed during the experiments, and surface finish and tool wear were analyzed afterwards. The results exhibited decreasing cutting forces by means of low feed per cutting edge and reduced process temperatures at low cutting speed, with the use of ultrasonic-assisted milling. It was shown that the machinability of these modern alloys through conventional, as well as modern machining methods such as ultrasonic-assisted milling, is viable, and common theories in machining can be transferred to these novel MPEAs. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

39. Making use of climate information for protecting cultural heritage from extreme weather events in a warming world

Author

Kotova, Lola, primary, Leissner, Johanna, additional, Winkler, Matthias, additional, Antretter, Florian, additional, Kilian, Ralf, additional, Mossgraber, Jürgen, additional, Reuter, Jürgen, additional, Hellmund, Tobias, additional, Dolgov, Anton, additional, Matheja, Katharina Matheja, additional, Rhode, Michael Rohde, additional, Pollmer, Uta, additional, and Mikolajewicz, Uwe, additional

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results