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本文研究了当前作为包壳材料使用在卡尔德·霍尔和切佩尔·克罗斯反应堆中的马格诺斯A.12镁基合金的蠕变延性和高温疲劳行为。特别注意该合金呈现最小延性和晶间空化最严重的较低反应堆温度范围内的蠕变行为。还研究了温度、应变速率和晶粒度对延性和空化的影响。由于缺乏该合金高温疲劳强度的资料,在225—500℃范围内进行了测量。在400和450℃下进行了详细的研究,这时的疲劳强度最低。除了引起一般破裂
This paper studies the creep ductility and high temperature fatigue behavior of the Magnoth A12 magnesium-based alloys currently used as cladding material in the Calder Hall and Celer-Crosst reactors. Particular attention is paid to the creep behavior of this alloy in the lower reactor temperature range with minimal ductility and the most severe intergranular cavitation. The effects of temperature, strain rate and grain size on ductility and cavitation were also studied. Due to the lack of high-temperature fatigue strength of the alloy material, measured in the 225-500 ℃ range. At 400 and 450 ℃ conducted a detailed study, when the fatigue strength of the lowest. In addition to causing general rupture