RCF103 合金定向能沉积熔池中树枝状晶粒竞争生长机制的相场研究

IF 1.6 4区材料科学 Q2 Materials Science Transactions of The Indian Institute of Metals Pub Date : 2024-07-24 DOI:10.1007/s12666-024-03411-y

Boxue Song, Xingyu Jiang, Zisheng Wang

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摘要

在 DED 熔池中，高凝固速率和温度梯度使竞争性枝晶生长的表征变得复杂。针对这一问题，WBM 相场方法模拟了 RCF103 合金中的枝晶生长，揭示了倾斜枝晶与凝固参数之间的相关性。它探索了不同枝晶形态（柱状和海藻状）之间的竞争机制，以及表面能各向异性和尖端过冷在决定枝晶形状中的作用。这些发现加深了我们对 DED 熔池枝晶生长的理解，有助于建立凝固结构、条件和工艺参数之间的关系。

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Phase-Field Study of the Competitive Growth Mechanism of Dendrites in the Directed Energy Deposition Melt Pool of RCF103 Alloy

In DED melt pools, high solidification rates and temperature gradients complicate characterizing competitive dendrite growth. To address this, the WBM phase-field method simulates dendrite growth in the RCF103 alloy, revealing correlations between tilted dendrites and solidification parameters. It explores the competitive mechanism between different dendrite morphologies (columnar and seaweed) and the role of surface energy anisotropy and tip undercooling in determining dendrite shape. These findings enhance our understanding of DED melt pool dendrite growth, facilitating the establishment of a relationship between solidification structure, conditions, and process parameters.

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来源期刊

Transactions of The Indian Institute of Metals Materials Science-Metals and Alloys

CiteScore

2.60

自引率

6.20%

发文量

期刊介绍： Transactions of the Indian Institute of Metals publishes original research articles and reviews on ferrous and non-ferrous process metallurgy, structural and functional materials development, physical, chemical and mechanical metallurgy, welding science and technology, metal forming, particulate technologies, surface engineering, characterization of materials, thermodynamics and kinetics, materials modelling and other allied branches of Metallurgy and Materials Engineering. Transactions of the Indian Institute of Metals also serves as a forum for rapid publication of recent advances in all the branches of Metallurgy and Materials Engineering. The technical content of the journal is scrutinized by the Editorial Board composed of experts from various disciplines of Metallurgy and Materials Engineering. Editorial Advisory Board provides valuable advice on technical matters related to the publication of Transactions.