Influence of PBF-LB Process Atmosphere on the Fatigue Strength of Hot Isostatically Post-Densified Duplex Steel Parts Produced via the Shell Core Approach
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-...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/11/4014 |
| _version_ | 1797597255318896640 |
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| author | Anke Kaletsch Markus Sondermann Markus Mirz Felix Radtke Christoph Broeckmann |
| author_facet | Anke Kaletsch Markus Sondermann Markus Mirz Felix Radtke Christoph Broeckmann |
| author_sort | Anke Kaletsch |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-11T03:02:56Z |
| format | Article |
| id | doaj.art-bef4c02246884ed396db1cdec8c1d614 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T03:02:56Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-bef4c02246884ed396db1cdec8c1d6142023-11-18T08:09:07ZengMDPI AGMaterials1996-19442023-05-011611401410.3390/ma16114014Influence of PBF-LB Process Atmosphere on the Fatigue Strength of Hot Isostatically Post-Densified Duplex Steel Parts Produced via the Shell Core ApproachAnke Kaletsch0Markus Sondermann1Markus Mirz2Felix Radtke3Christoph Broeckmann4Institute for Materials Applications in Mechanical Engineering (IWM), RWTH Aachen University, 52062 Aachen, GermanyInstitute for Materials Applications in Mechanical Engineering (IWM), RWTH Aachen University, 52062 Aachen, GermanyInstitute for Materials Applications in Mechanical Engineering (IWM), RWTH Aachen University, 52062 Aachen, GermanyInstitute of Applied Powder Metallurgy and Ceramics at RWTH Aachen e.V. (IAPK), 52062 Aachen, GermanyInstitute for Materials Applications in Mechanical Engineering (IWM), RWTH Aachen University, 52062 Aachen, GermanyLaser-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.https://www.mdpi.com/1996-1944/16/11/4014additive manufacturinglaser powder bed fusionPBF-LBhot isostatic pressingpost-densificationprocess gases |
| spellingShingle | Anke Kaletsch Markus Sondermann Markus Mirz Felix Radtke Christoph Broeckmann Influence of PBF-LB Process Atmosphere on the Fatigue Strength of Hot Isostatically Post-Densified Duplex Steel Parts Produced via the Shell Core Approach Materials additive manufacturing laser powder bed fusion PBF-LB hot isostatic pressing post-densification process gases |
| title | Influence of PBF-LB Process Atmosphere on the Fatigue Strength of Hot Isostatically Post-Densified Duplex Steel Parts Produced via the Shell Core Approach |
| title_full | Influence of PBF-LB Process Atmosphere on the Fatigue Strength of Hot Isostatically Post-Densified Duplex Steel Parts Produced via the Shell Core Approach |
| title_fullStr | Influence of PBF-LB Process Atmosphere on the Fatigue Strength of Hot Isostatically Post-Densified Duplex Steel Parts Produced via the Shell Core Approach |
| title_full_unstemmed | Influence of PBF-LB Process Atmosphere on the Fatigue Strength of Hot Isostatically Post-Densified Duplex Steel Parts Produced via the Shell Core Approach |
| title_short | Influence of PBF-LB Process Atmosphere on the Fatigue Strength of Hot Isostatically Post-Densified Duplex Steel Parts Produced via the Shell Core Approach |
| title_sort | influence of pbf lb process atmosphere on the fatigue strength of hot isostatically post densified duplex steel parts produced via the shell core approach |
| topic | additive manufacturing laser powder bed fusion PBF-LB hot isostatic pressing post-densification process gases |
| url | https://www.mdpi.com/1996-1944/16/11/4014 |
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