Affiliation:
1. Institute for Materials Applications in Mechanical Engineering (IWM), RWTH Aachen University, 52062 Aachen, Germany
2. Institute of Applied Powder Metallurgy and Ceramics at RWTH Aachen e.V. (IAPK), 52062 Aachen, Germany
Abstract
Laser-based additive manufacturing is a great manufacturing technology for producing parts of any geometry. To also increase the strength and reliability of parts produced via powder bed fusion with laser beam (PBF-LB), hot isostatic pressing (HIP) is often used to densify residual porosity or lack-of-fusion defects. When components are post-densified via HIP, they do not require a high density beforehand, only a closed porosity or a dense shell. By building up samples with increased porosity, the PBF-LB process can be accelerated and productivity increased. HIP post-treatment gives the material its full density and good mechanical properties. However, with this approach, the influence of the process gases becomes important. Either argon or nitrogen is used in the PBF-LB process. It is assumed that these process gases are trapped in the pores and thus have an influence on the HIP process and also the mechanical properties after HIP. In this study, the influence of argon and nitrogen as process gases on the properties of duplex AISI 318LN steel after powder bed fusion with laser beam and hot isostatic pressing is investigated for the case of very high initial porosities.
Funder
Deutsche Forschungsgemeinschaft
Subject
General Materials Science
Reference41 articles.
1. Langefeld, B., Moehrle, M., Balzer, C., and Schildbach, P. (2023, April 27). Advancements in Metal 3D Printing. Available online: https://www.rolandberger.com/publications/publication_pdf/Roland_Berger_Additive_Manufacturing.pdf.
2. Dejene, N.D., and Lemu, H.G. (2023). Current Status and Challenges of Powder Bed Fusion-Based Metal Additive Manufacturing: Literature Review. Metals, 13.
3. Fatigue performance evaluation of selective laser melted Ti–6Al–4V;Edwards;Mater. Sci. Eng. A,2014
4. Effects of defects on mechanical properties in metal additive manufacturing: A review focusing on X-ray tomography insights;Plessis;Mater. Des.,2020
5. Fundamental aspects of hot isostatic pressing: An overview;Atkinson;Metall. Mater. Trans. A,2000
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献