Quantification of Interdependent Dynamics during Laser Additive Manufacturing Using X-Ray Imaging Informed Multi-Physics and Multiphase Simulation.
Quantification of Interdependent Dynamics during Laser Additive Manufacturing Using X-Ray Imaging Informed Multi-Physics and Multiphase Simulation.
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DOI：
10.1002/advs.202203546
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发表时间：
2022-12
期刊：
影响因子：
15.1
通讯作者：
Lee, Peter D.
中科院分区：
文献类型：
--
作者：
Leung, Chu Lun Alex;Luczyniec, Dawid;Guo, Enyu;Marussi, Sebastian;Atwood, Robert C.;Meisnar, Martina;Saunders, Ben;Lee, Peter D.
激光粉末床熔融（LPBF）可以为许多行业生产高价值的金属部件;然而，由于存在缺陷，其在安全关键应用中的应用受到阻碍。缺陷和工艺参数之间的相互依赖性仍然不清楚。在这里，使用X射线和电子成像以及高保真多相工艺模拟，对LPBF过程中孔隙率和驼峰的演变进行了量化。孔和小孔的形成机制是由高温和小孔中的高金属蒸气浓度的混合驱动的。不规则气孔是通过小孔塌陷、气孔合并，然后被凝固前沿捕获而形成的。快速移动的蒸气羽流和熔池的混合在熔体轨迹表面处引起开尔文-亥姆霍兹不稳定性，形成隆起。X射线成像和高保真度模型用于量化单层条件下的孔隙演化动力学、孔径分布、波纹度、表面粗糙度和熔体体积。这项工作提供的关键标准，管理在LPBF的缺陷形成的见解，并建议如何提高工艺的可靠性。使用X射线和电子成像以及高保真度模拟揭示了镍合金增材制造过程中的孔隙演变和金属蒸发机制，包括：a）孔隙特征; B）晶粒纹理;以及c）高速X射线图像显示了增材制造过程中的孔隙移动、聚结和生长。高保真模拟模型用于量化固-液-氩-蒸气相互作用：d）孔隙演变;和e）金属蒸发机制。
Laser powder bed fusion (LPBF) can produce high‐value metallic components for many industries; however, its adoption for safety‐critical applications is hampered by the presence of imperfections. The interdependency between imperfections and processing parameters remains unclear. Here, the evolution of porosity and humps during LPBF using X‐ray and electron imaging, and a high‐fidelity multiphase process simulation, is quantified. The pore and keyhole formation mechanisms are driven by the mixing of high temperatures and high metal vapor concentrations in the keyhole is revealed. The irregular pores are formed via keyhole collapse, pore coalescence, and then pore entrapment by the solidification front. The mixing of the fast‐moving vapor plume and molten pool induces a Kelvin–Helmholtz instability at the melt track surface, forming humps. X‐ray imaging and a high‐fidelity model are used to quantify the pore evolution kinetics, pore size distribution, waviness, surface roughness, and melt volume under single layer conditions. This work provides insights on key criteria that govern the formation of imperfections in LPBF and suggest ways to improve process reliability. Revealing pore evolution and metal vaporization mechanisms during additive manufacturing of Ni‐alloys using X‐ray and electron imaging, and high‐fidelity simulation, including: a) pore characteristics; b) grain texture; and c) high‐speed X‐ray images showed pore movement, coalescence and growth during AM. The high‐fidelity simulation model was used to quantify the solid‐liquid‐argon‐vapor interactions on: d) pore evolution; and e) metal vaporization mechanisms.
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影响因子：
8.3
作者：
Chen, Yunhui;Clark, Samuel J.;Lee, Peter D.
通讯作者：
Lee, Peter D.
选择性激光熔化的建模和数值研究：多相流、凝固和传热
影响因子：
8.4
作者：
He, Qiyang;Xia, Huanxiong;Lin, Shengxiang
通讯作者：
Lin, Shengxiang
影响因子：
11
作者：
Bayat, Mohamad;Thanki, Aditi;Hattel, Jesper Henri
通讯作者：
Hattel, Jesper Henri
影响因子：
16.6
作者：
Huang Y;Fleming TG;Clark SJ;Marussi S;Fezzaa K;Thiyagalingam J;Leung CLA;Lee PD
通讯作者：
Lee PD
影响因子：
2.5
作者：
Drakopoulos M;Connolley T;Reinhard C;Atwood R;Magdysyuk O;Vo N;Hart M;Connor L;Humphreys B;Howell G;Davies S;Hill T;Wilkin G;Pedersen U;Foster A;De Maio N;Basham M;Yuan F;Wanelik K
通讯作者：
Wanelik K