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| Naji, M. |
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| Azevedo, Nuno Monteiro |
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Schlegel, Stephan
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023Verhalten von Clinchverbindungen bei Belastung mit hohen Kurzzeitströmen
- 2023Investigations on the Heat Transfer between an Electrical Heating Rod and a Rail for Heated Railway Switch Pointscitations
- 2023Diffusion of Silver in Liquid Tin Depending on the Temperature Gradient Along the Solder in Low-Voltage Power Fuses at Overcurrents
- 2022Self-lubricating coatings for high-current connectors
- 2022Electrical Contacting of Aluminum Bus Bars Using Clinching and Functional Elements †citations
- 2022Long-Term Behavior of Clinched Electrical Contactscitations
- 2022Investigations on the influence of mechanical and thermal load on the clamping force of heating rod clamps
- 2021Synthesis and structural analysis of intermetallic compounds in electrical connectionscitations
- 2017Effect of dispersoids on long-term stable electrical aluminium connectionscitations
- 2011Langzeitverhalten von Schraubenverbindungen mit Stromschienen aus Reinkupfer in der Elektroenergietechnik unter besonderer Berücksichtigung der Temperatur
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document
Effect of dispersoids on long-term stable electrical aluminium connections
Abstract
<p>In electrical power systems bolted joints with bus bars made of aluminium are common, whereby the tendency towards higher operating temperatures can be observed. At higher temperatures a reduction of the joint force can occur due to creep and/or stress relaxation processes, which leads to an increasing electrical resistance and, in the worst case, to failed joints. The aim of this project is to increase the creep resistance (and to minimise the stress relaxation) of aluminium conductors for electrical applications without a significant reduction in their electrical conductivity – even after long-term exposure to elevated temperatures. The effect of dispersoids in different aluminium alloys on the long-term behaviour of current-carrying joints at high temperatures (i.e. 140 °C) was investigated. Long-term tests on bolted joints with force measuring devices were performed to monitor the joint forces and to measure the joint resistances, both with and without current supply.</p>