金属增材制造镍合金微观组织驱动的性能演变

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2025-05-17 DOI:10.1016/j.intermet.2025.108834

R. Raghu , P. Chandramohan , D. Pradeesh kumar , Amar Singh

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引用次数: 0

摘要

激光粉末床融合（LPBF）工艺对于航空航天部门生产具有复杂几何形状的部件以获得更好的性能至关重要。本研究采用LPBF法制备了镍基高温合金CM247LC。显微观察发现合金中存在碳化物。在纵剖面上，电子反向散射衍射（EBSD）显示出拉长的颗粒，在横剖面上显示出等轴的团簇。计算出凝固过程中的冷却速率约为106 K/s。所得样品的屈服强度较以往研究结果有所提高。高强度的来源被解释为更高的沉淀浓度、位错密度、更精细的细胞结构和细胞内的γ′。

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Microstructure-driven property evolution in metal additive manufactured nickel alloy

The laser Powder Bed Fusion (LPBF) process is vital for aerospace sector to produce components with intricate geometry for better performance. In the present study, the nickel-based superalloy CM247LC was manufactured through LPBF. Microscopically, alloy revealed the presence of carbides. In the longitudinal section, Electron Backscatter Diffraction (EBSD) exposed elongated grains and in transverse section, equiaxed clusters. Rate of cooling during solidification was calculated to be approximately 10⁶ K/s. Yield strength of the samples found higher compared to the previous research. Sources of higher strength are interpreted as higher precipitate concentrations, dislocation density, finer cellular structure, and γ′ inside cells.

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.