Effect of Dispersoids on Long-Term Stable Electrical Aluminium Connections
Effect of Dispersoids on Long-Term Stable Electrical Aluminium Connections
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DOI：
10.4028/www.scientific.net/msf.877.409
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发表时间：
2016-11
期刊：
影响因子：
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通讯作者：
Richard H. Kemsies;B. Milkereit;O. Kessler;T. Fuhrmann;Stephan Schlegel;Falk Plonus;Simon Miller-Jupp;J. Hirsch
中科院分区：
文献类型：
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作者：
Richard H. Kemsies;B. Milkereit;O. Kessler;T. Fuhrmann;Stephan Schlegel;Falk Plonus;Simon Miller-Jupp;J. Hirsch
在电力系统中，与铝制母线的螺栓连接是常见的，由此可以观察到朝向更高操作温度的趋势。在较高的温度下，由于蠕变和/或应力松弛过程，可能会发生接头力的降低，这导致电阻增加，并且在最坏的情况下，导致接头失效。该项目的目的是提高用于电气应用的铝导体的抗蠕变性（并最大限度地减少应力松弛），而不会显着降低其导电性-即使在长期暴露于高温下。研究了不同铝合金中弥散相对高温（即140 °C）载流接头长期性能的影响。长期测试螺栓连接与力测量设备进行监测的联合力量，并测量接头电阻，有和没有电流供应。
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 longterm behaviour of currentcarrying joints at high temperatures (i.e. 140 °C) was investigated. Longterm 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.