通过激光定向能沉积技术原位混合 316L-Si 和 PH48S 以实现功能分级应用

IF 3.2 3区工程技术 Q2 ENGINEERING, INDUSTRIAL

Cirp Annals-Manufacturing Technology Pub Date : 2024-01-01 DOI:10.1016/j.cirp.2024.04.041

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引用次数: 0

摘要

激光粉末吹塑定向能沉积（DED）可灵活制造功能梯度结构。在混合多种原料的区域，应用 "混合物法则 "是很自然的。在这里，我们展示了使用 DED 混合 PH48S 和 316L-Si 钢粉的结果，这种材料的屈服强度较低，但硬化程度却有所提高，而且还出现了在原始合金中未观察到的二次硬化现象，从而使原料特性之间的直接内插法失效。对混合材料的微观结构分析表明，该材料具有凝固驱动的多相分层微观结构。这一结果使得材料和制造工艺的协同设计更加精确，设计空间更大。

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In-situ blended 316L-Si and PH48S via laser directed energy deposition for functionally graded applications

Laser powder blown directed-energy deposition (DED) enables the flexible fabrication of functionally gradient structures. In the region where multiple feedstocks are blended, it is natural to apply the ‘rule of mixtures’. Here, we show that by blending PH48S and 316L-Si steel powders using DED, the resulting material possesses lower yield strength but increased hardening and a secondary hardening regime not observed in the original alloys, invalidating direct interpolation between feedstock properties. Microstructural analysis of the mixed material revealed a solidification-driven multi-phase hierarchal microstructure. This result enables greater accuracy and increased design space in the co-design of materials and manufacturing processes.

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来源期刊

Cirp Annals-Manufacturing Technology 工程技术-工程：工业

CiteScore

7.50

自引率

9.80%

发文量

137

审稿时长

13.5 months

期刊介绍： CIRP, The International Academy for Production Engineering, was founded in 1951 to promote, by scientific research, the development of all aspects of manufacturing technology covering the optimization, control and management of processes, machines and systems. This biannual ISI cited journal contains approximately 140 refereed technical and keynote papers. Subject areas covered include: Assembly, Cutting, Design, Electro-Physical and Chemical Processes, Forming, Abrasive processes, Surfaces, Machines, Production Systems and Organizations, Precision Engineering and Metrology, Life-Cycle Engineering, Microsystems Technology (MST), Nanotechnology.