近浸没主动冷却技术对定向能沉积电弧Inconel 718合金形成及组织的影响

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2024-10-22 DOI:10.1007/s12540-024-01819-1

Pengcheng Huan, Fei Teng, Xiaonan Wang, Lijia He, Yawei Song, Zhentao Wang, Qingyu Zhang, Hongshuang Di

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引用次数: 0

摘要

本文研究了近浸没主动冷却技术（NIAC）辅助下定向能沉积电弧Inconel 718合金的形成和显微组织。结果表明：NIAC提高了水热传导冷却速率，缩短了金属液的凝固时间，抑制了溢流现象，显著降低了表面粗糙度（358 μm→252 μm）；冷却速率的增大导致过冷度的增大，提高了成核的驱动力，减小了平均晶粒尺寸。此外，冷却速率的增加还抑制了Nb的偏析，使Laves相的尺寸大大减小，Laves相面积分数从5.4降低到1.9%。图形抽象

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Effect of Near Immersion Active Cooling Technology on the Formation and Microstructure of Directed Energy Deposition-Arc Inconel 718 Alloy

This article studies the formation and microstructure of directed energy deposition-arc Inconel 718 alloy assisted by near immersion active cooling technology (NIAC). The results indicate that, NIAC increases the cooling rate through water heat conduction, shortens the solidification time of the molten metal, suppresses the overflow phenomenon, and significantly reduces the surface roughness (358 μm→252 μm). The increase in the cooling rate leads to the growth of subcooling, which improves the driving force for nucleation and reduces the average grain size. In addition, the increase in cooling rate also suppresses the segregation of Nb, greatly reduces the size of the Laves phase, and the Laves phase area fraction reduces from 5.4 to 1.9%.

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.