Experimental evidence of liquid feeding during solidification of a steel
Experimental evidence of liquid feeding during solidification of a steel
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DOI：
10.1016/j.scriptamat.2017.11.003
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发表时间：
2018-03-15
影响因子：
6
通讯作者：
Hermans, M. J. M.
中科院分区：
文献类型：
--
作者：
Agarwal, G.;Amirthalingam, M.;Hermans, M. J. M.
在受限的凝固条件下，如焊接和铸造中所经历的，充足的液体补给对于避免凝固裂纹至关重要。我们给出了凝固钢液熔池中液体补给的独特的现场实验观测结果。在凝固末期，在胞间区域观察到液体补给现象。S的平均液体流速为450-500 pm(-1)。计算出引起液体流动的压差为10(4)pa数量级。研究发现，凝固收缩速率和变形速率小于补液速率。(C)2017爱思唯尔有限公司。保留所有权利。
Sufficient liquid feeding under constrained solidification conditions like, those experienced in welding and casting, is vital to avoid solidification cracking. We present the results of unique in-situ experimental observations of liquid feeding in a solidifying steel melt pool. Liquid feeding was observed in the intercellular regions during the terminal stage of solidification. An average liquid flow speed of 450-500 pm s(-1) was found. A pressure difference of the order of 10(4) Pa is calculated to cause the liquid flow. The rate of solidification shrinkage and the rate of deformation were found to be less than the rate of liquid feeding. (C) 2017 Elsevier Ltd. All rights reserved.