縱向磁場作用下DZ417G高溫合金的枝晶生長行為
發(fā)布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-12-24
研究縱向磁場對高溫合金DZ417G定向凝固顯微組織的影響。
縱向磁場作用下DZ417G高溫合金的枝晶生長行為Dendrite growth behavior of DZ417G superalloy?under longitudinal magnetic field研究縱向磁場對高溫合金DZ417G定向凝固顯微組織的影響。結(jié)果表明：在較低生長速率下，磁場能顯著影響高溫合金柱狀枝晶的生長；低磁場(＜0.1 T)能使枝晶生長規(guī)則化，生長方向逐漸統(tǒng)一并平行于磁場方向，一次枝晶臂間距減小；高磁場(＞2 T)破壞枝晶生長，枝晶發(fā)生斷裂，逐漸出現(xiàn)一些云狀組織；隨著生長速率的增大，磁場的影響逐漸減弱。并從磁場誘發(fā)熱電磁對流和熔體流動影響枝晶生長的角度對實驗結(jié)果進(jìn)行分析。
The influence of longitudinal magnetic field on the microstructures of DZ417G superalloy at different growing rates was investigated. The results show that the magnetic field (＜0.1 T) can affect significantly the regular dendrite growth and primary dendrite arm spacing of DZ417G superalloy at low growing rate, and the growth direction is parallel to the direction of magnetic field. But the high magnetic field(＞2 T)can disturb the regular morphology of dendrite growth. The dendrite morphologies are destroyed when the magnetic field is applied. The effect of magnetic field is weak when the growing rate increases. Based on the theory of the influence of magnetic field on fluid, the above phenomenon was analyzed.
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