发表机构
Univ. Bordeaux, ESTIA Institute of Technology; Arts et Métiers Institute of Technology, CNRS, Bordeaux INP, I2M, UMR 5295（波尔多大学，ESTIA理工学院; 巴黎国立高等工艺学院，法国国家科学研究中心，波尔多国立理工学院，I2M实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过全流程方法评估了Inconel 625粉末再利用对定向能量沉积工艺的影响，发现热等静压改善延展性但降低强度，回收粉末氧含量增加，提示需关注其对未来生产的影响。
AI 中文摘要
在基于激光粉末的定向能量沉积中，金属粉末的再利用为增材制造带来了可观的可持续性优势，但其对零件质量的影响仍属未知。本研究探讨了粉末再利用对Inconel 625定向能量沉积工艺的影响。首先对原始粉末的流动性、形貌、尺寸和化学成分进行了表征，然后在固定工艺参数下用于制造零件。这些零件通过两种构型（沉积态和热等静压态）进行分析，以评估微观组织演变和力学性能。结果表明，热等静压降低了孔隙率并促进了晶粒再结晶，在提高延展性的同时降低了抗拉强度。对经过一个制造周期的回收粉末也进行了表征。粒度分布和形貌保持稳定，而间隙元素含量，尤其是氧含量，有所增加，这可能影响未来生产中的激光-材料相互作用和熔池行为。这些发现强调了通过从粉末到最终零件的全流程方法评估粉末再利用的重要性。未来工作将聚焦于使用回收粉末制造的零件的拉伸和疲劳性能。
英文摘要
The reuse of metal powders in directed energy deposition using laser powder offers promising sustainability benefits for additive manufacturing, yet its impact on part quality remains unknown. This study investigates the influence of powder reuse on the directed energy deposition process of Inconel 625. Virgin powder was first characterized in terms of flowability, morphology, size and chemical composition, then used to manufacture parts under fixed process parameters. These parts were analysed through two configurations (as-built and hot isostatically pressed) to assess microstructural evolution and mechanical performance. Results show that hot isostatic pressing reduces porosity and promotes grain recrystallization, enhancing ductility while decreasing tensile strength. Recovered powders from one manufacturing cycle, were also characterized. Particle size distribution and morphology remained stable, interstitial contents, particularly oxygen, increased, potentially affecting laser-material interaction and melt pool behaviour in future production. These findings highlight the importance of evaluating powder reuse through a full-process approach, from powder to final part. Future work will focus on the tensile and fatigue performance of parts produced with recovered powders.
Journal refMetal AMS 2026, 3rd edition International Conference Metal Additive Manufacturing, CETIM, Mar 2026, Senlis, France
