Study on the Effect of Preheating Temperatures on Melt Pool Stability in Inconel 718 Components Processed by Laser Powder Bed Fusion
Laser Powder Bed Fusion (L-PBF) is one of the most widespread, versatile, and promising metal Additive Manufacturing (AM) techniques. L-PBF allows for the manufacturing of geometrically complex parts with good surface characteristics. In this process, in order to minimize the heat loss in the first...
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| Format: | Article |
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MDPI AG
2023-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/10/1792 |
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| author | Niccolò Baldi Alessandro Giorgetti Marco Palladino Iacopo Giovannetti Gabriele Arcidiacono Paolo Citti |
| author_facet | Niccolò Baldi Alessandro Giorgetti Marco Palladino Iacopo Giovannetti Gabriele Arcidiacono Paolo Citti |
| author_sort | Niccolò Baldi |
| collection | DOAJ |
| description | Laser Powder Bed Fusion (L-PBF) is one of the most widespread, versatile, and promising metal Additive Manufacturing (AM) techniques. L-PBF allows for the manufacturing of geometrically complex parts with good surface characteristics. In this process, in order to minimize the heat loss in the first layers of printing, the building platform is preheated to a temperature ranging between 80 and 250 °C. This aspect turns out to be very critical, and further investigation is needed for situations where the part to be printed is only a few layers high, as is the case in sensor printing. This work aims to investigate the melt pool stability under a variation in the preheating temperatures. We investigate the distance from the building platform, considering the number of layers printed. This is where the melt pool reaches its stability in terms of depth and width. This aspect turns out to be of remarkable importance for ensuring the structural integrity of parts with a few layers of height that are processed through L-PBF, such as sensors, which are proliferating in different industries. Thus, two case studies were carried out on IN718 superalloys at 40 and 60 microns of layer thickness and a preheating temperature of 170 °C on the machine. The results obtained show that after 1.2 mm of distance from the building platform, the melt pool reached its stability in terms of width and depth dimensions and consequently for the melting regime. |
| first_indexed | 2024-03-10T21:03:09Z |
| format | Article |
| id | doaj.art-faccbbec5a334e6e991b44a517de5be0 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T21:03:09Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-faccbbec5a334e6e991b44a517de5be02023-11-19T17:23:04ZengMDPI AGMetals2075-47012023-10-011310179210.3390/met13101792Study on the Effect of Preheating Temperatures on Melt Pool Stability in Inconel 718 Components Processed by Laser Powder Bed FusionNiccolò Baldi0Alessandro Giorgetti1Marco Palladino2Iacopo Giovannetti3Gabriele Arcidiacono4Paolo Citti5Department of Engineering Science, Guglielmo Marconi University, 00193 Rome, ItalyDepartment of Industrial, Electronic and Mechanical Engineering, Roma Tre University, 00146 Rome, ItalyBaker Hughes—Nuovo Pignone, 50127 Florence, ItalyBaker Hughes—Nuovo Pignone, 50127 Florence, ItalyDepartment of Engineering Science, Guglielmo Marconi University, 00193 Rome, ItalyDepartment of Engineering Science, Guglielmo Marconi University, 00193 Rome, ItalyLaser Powder Bed Fusion (L-PBF) is one of the most widespread, versatile, and promising metal Additive Manufacturing (AM) techniques. L-PBF allows for the manufacturing of geometrically complex parts with good surface characteristics. In this process, in order to minimize the heat loss in the first layers of printing, the building platform is preheated to a temperature ranging between 80 and 250 °C. This aspect turns out to be very critical, and further investigation is needed for situations where the part to be printed is only a few layers high, as is the case in sensor printing. This work aims to investigate the melt pool stability under a variation in the preheating temperatures. We investigate the distance from the building platform, considering the number of layers printed. This is where the melt pool reaches its stability in terms of depth and width. This aspect turns out to be of remarkable importance for ensuring the structural integrity of parts with a few layers of height that are processed through L-PBF, such as sensors, which are proliferating in different industries. Thus, two case studies were carried out on IN718 superalloys at 40 and 60 microns of layer thickness and a preheating temperature of 170 °C on the machine. The results obtained show that after 1.2 mm of distance from the building platform, the melt pool reached its stability in terms of width and depth dimensions and consequently for the melting regime.https://www.mdpi.com/2075-4701/13/10/1792Inconel 718laser powder bed fusionnickel-based superalloysdesign for additive manufacturingpreheating temperaturemelt pool morphology |
| spellingShingle | Niccolò Baldi Alessandro Giorgetti Marco Palladino Iacopo Giovannetti Gabriele Arcidiacono Paolo Citti Study on the Effect of Preheating Temperatures on Melt Pool Stability in Inconel 718 Components Processed by Laser Powder Bed Fusion Metals Inconel 718 laser powder bed fusion nickel-based superalloys design for additive manufacturing preheating temperature melt pool morphology |
| title | Study on the Effect of Preheating Temperatures on Melt Pool Stability in Inconel 718 Components Processed by Laser Powder Bed Fusion |
| title_full | Study on the Effect of Preheating Temperatures on Melt Pool Stability in Inconel 718 Components Processed by Laser Powder Bed Fusion |
| title_fullStr | Study on the Effect of Preheating Temperatures on Melt Pool Stability in Inconel 718 Components Processed by Laser Powder Bed Fusion |
| title_full_unstemmed | Study on the Effect of Preheating Temperatures on Melt Pool Stability in Inconel 718 Components Processed by Laser Powder Bed Fusion |
| title_short | Study on the Effect of Preheating Temperatures on Melt Pool Stability in Inconel 718 Components Processed by Laser Powder Bed Fusion |
| title_sort | study on the effect of preheating temperatures on melt pool stability in inconel 718 components processed by laser powder bed fusion |
| topic | Inconel 718 laser powder bed fusion nickel-based superalloys design for additive manufacturing preheating temperature melt pool morphology |
| url | https://www.mdpi.com/2075-4701/13/10/1792 |
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