A model for eutectic growth in multicomponent alloys
A model for eutectic growth in multicomponent alloys
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多元合金共晶生长模型
DOI：
10.1088/1757-899x/84/1/012085
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
A. Genau
中科院分区：
文献类型：
--
作者：
A. Catalina;P. Voorhees;R. Huff;A. Genau
提出了多元合金共晶长大模型。在对经典的共晶生长理论进行的其他几个修正中，该模型引入了相分数变化作为在共晶合金凝固过程中保持等温固/液界面的主要机制。对Fe-C基合金的理论结果与实验测量结果的比较表明，对于成分离共晶点不太远的合金，理论结果与实验测量结果吻合得很好。分析还表明，早先提出的基于小面相体积分数的二元非规则共晶间距选择准则也适用于多组分合金。研究了Si对Fe-C-Si共晶合金生长动力学的影响，结果表明，生长系数μ随Si含量的增加而减小。
A model for eutectic growth of multicomponent alloys is proposed. Among several other modifications brought to the classic theory of eutectic growth, the model introduces the phase fraction change as the main mechanism for maintaining an isothermal solid/liquid interface during solidification of eutectic alloys. A comparison between the theoretical results and experimental measurements for the Fe-C based alloys showed a good agreement for alloys of composition not too far removed from the eutectic point. The analysis also showed that an earlier proposed criterion for spacing selection of binary irregular eutectics, based on volume fraction of the faceted phase, can be applied to multicomponent alloys as well. The investigation performed on the effect of Si on the growth kinetics of Fe-C-Si eutectic alloys showed that the growth coefficient μ decreases with the increase of Si content.