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首页> 外文期刊>Materials at High Temperatures >Influence of chemical compositions and creep test conditions on UK R5 creep ductility parameter lambda of W-Mo-balanced 9Cr steel
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Influence of chemical compositions and creep test conditions on UK R5 creep ductility parameter lambda of W-Mo-balanced 9Cr steel

机译:化学成分和蠕变试验条件对英国R5蠕变延展性参数Lambda的影响

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摘要

The influence of boron nitride (BN) particles, W and Mo concentrations and creep test conditions of stress, temperature and test duration on the creep ductility parameter lambda in UK R5 has been investigated for five heats of W-Mo-balanced 9Cr steel with 1.5% Mo equivalent at 600, 650 and 700(o)C. With increasing time to rupturet(r), the lambda at first decreases only a little bit, then increases for up to a time showing a maximum peak and finally significantly decreases. The BN particles are responsible for the decreases in lambda at long times by accelerating the formation of creep voids. The evaluation of creep rupture ductility based on the lambda should be restricted to the long-time region at low stresses after reaching a maximum peak in lambda, where the lambda decreases with increasingt(r)mainly by a decrease in total elongation.
机译:硼氮化物(BN)颗粒,W和MO浓度和蠕变试验条件的影响,对英国R5蠕变延展性Lambda的蠕变延展性参数Lambda的持续时间进行了研究,对1.5的W-Mo-Balanced 9Cr钢的五次热量进行了5个 %Mo等效于600,650和700(o)c。 随着Rupturet(R)的时间增加,λ起初仅降低了一点,然后增加了最大峰值,最终显着降低。 通过加速蠕变空隙的形成,BN颗粒长时间负责Lambda的减少。 基于λ的蠕变破裂延性的评估应在λ在λ在λ在λ中达到最大峰后的低应力下的长时间区域,其中Lambda随着总伸长率的降低而增加,λ随着量增加而降低。

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