A non-isothermal multi-phase field approach to model the meltpool and IMC grains interaction in Ti-Au material

IF 3.1 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Computational Materials Science Pub Date : 2025-04-24 DOI:10.1016/j.commatsci.2025.113875

Upadesh Subedi , Nele Moelans , Tomasz Tański , Anil Kunwar

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Abstract

This study introduces a combined phase-field multi-physics approach to simulate laser-induced phase transformations and microstructural evolution in the Ti-Au alloy system, which is crucial for advancing additive manufacturing processes. By varying laser parameters, such as irradiance and scan speed, we used simulations to quantify phase areas and free energy dynamics, revealing intricate interplays between heat flow and chemical diffusion. The simulations show that under maximum heat flux conditions (150 kW/cm

^{2}

at 4 nm/ms), meltpool depth reached 180 nm, surpassing the 158 nm depth observed at 134.6 kW/cm

^{2}

. Moreover, the growth of Ti

_{3}

Au intermetallic compound (IMC) formed due to the interfacial reaction was studied. IMC layer thickness peaked at 364 nm under higher irradiance, marking a 25% increase over lower irradiance conditions. Analysis of Lewis Number revealed that meltpool diffusion occurs more slowly than heat transfer.

Abstract Image

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用非等温多相场方法模拟钛金材料中熔池和IMC晶粒相互作用

本研究介绍了一种相场多物理场相结合的方法来模拟激光诱导的Ti-Au合金体系的相变和微观组织演变，这对于推进增材制造工艺至关重要。通过改变激光参数，如辐照度和扫描速度，我们使用模拟来量化相面积和自由能动力学，揭示热流和化学扩散之间复杂的相互作用。模拟结果表明，在最大热流密度条件下（4 nm/ms时150 kW/cm2），熔池深度达到180 nm，超过了134.6 kW/cm2时观测到的158 nm深度。并对界面反应形成的Ti3Au金属间化合物（IMC）的生长进行了研究。在高辐照度条件下，IMC层厚度在364nm处达到峰值，比低辐照度条件下增加了25%。刘易斯数分析表明，熔池扩散比换热慢。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computational Materials Science 工程技术-材料科学：综合

CiteScore

6.50

自引率

6.10%

发文量

665

审稿时长

26 days

期刊介绍： The goal of Computational Materials Science is to report on results that provide new or unique insights into, or significantly expand our understanding of, the properties of materials or phenomena associated with their design, synthesis, processing, characterization, and utilization. To be relevant to the journal, the results should be applied or applicable to specific material systems that are discussed within the submission.