Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technology
Although various alloy systems have been explored for additive manufacturing (AM) during the past decade, introducing a new alloy remains a challenging task. Most of the materials require iterative builds, for investigating numerous parameters and determining a viable and repeatable process window.A...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-06-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127521002094 |
| _version_ | 1818440589113294848 |
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| author | Robert Otto Vegard Brøtan Patricia A. Carvalho Magnus Reiersen Joachim S. Graff Martin F. Sunding Olav Åsebø Berg Spyros Diplas Amin S. Azar |
| author_facet | Robert Otto Vegard Brøtan Patricia A. Carvalho Magnus Reiersen Joachim S. Graff Martin F. Sunding Olav Åsebø Berg Spyros Diplas Amin S. Azar |
| author_sort | Robert Otto |
| collection | DOAJ |
| description | Although various alloy systems have been explored for additive manufacturing (AM) during the past decade, introducing a new alloy remains a challenging task. Most of the materials require iterative builds, for investigating numerous parameters and determining a viable and repeatable process window.Among the challenging yet highly demanded materials, Haynes 282 superalloy was chosen. It was initially processed through conventional density cube approach, by varying the process parameters for each processed cube. Although the relative densities of the initial builds were not dramatically low, micro-cracks were present in all of them, mostly evolved on a selective number of grain boundaries and spanning only across a single laser path. Detailed modelling and advanced characterization techniques were employed to understand the root cause and cracking mechanism. It was found that the grain boundary precipitates are responsible for crack initiation, amid stress gradient across the grain boundary due to the adjacent grain orientations. Therefore, the failure mechanism is determined as ductility-dip cracking. Based on the findings, a new process window was defined using elevated temperature and novel scanning strategy. No cracks were observed under the modified processing window, meaning that the material can reliably be processed by laser beam powder bed fusion (PBF-LB). |
| first_indexed | 2024-12-14T18:14:45Z |
| format | Article |
| id | doaj.art-483cb59b25a44897b0d8adfd43f9584b |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-14T18:14:45Z |
| publishDate | 2021-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-483cb59b25a44897b0d8adfd43f9584b2022-12-21T22:52:13ZengElsevierMaterials & Design0264-12752021-06-01204109656Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technologyRobert Otto0Vegard Brøtan1Patricia A. Carvalho2Magnus Reiersen3Joachim S. Graff4Martin F. Sunding5Olav Åsebø Berg6Spyros Diplas7Amin S. Azar8Siemens AG, Technology, Germany; Norwegian University of Science and Technology (NTNU), Department of Mechanical and Industrial Engineering, Trondheim, Norway; Corresponding author at: Otto-Hahn-Ring 6, 81739 Munich, Germany.SINTEF Manufacturing, Trondheim, NorwaySINTEF Industry, Oslo, NorwayUniversity of Oslo (UiO), Oslo, NorwaySINTEF Industry, Oslo, NorwaySINTEF Industry, Oslo, NorwaySINTEF Manufacturing, Trondheim, NorwaySINTEF Industry, Oslo, NorwaySINTEF Industry, Oslo, NorwayAlthough various alloy systems have been explored for additive manufacturing (AM) during the past decade, introducing a new alloy remains a challenging task. Most of the materials require iterative builds, for investigating numerous parameters and determining a viable and repeatable process window.Among the challenging yet highly demanded materials, Haynes 282 superalloy was chosen. It was initially processed through conventional density cube approach, by varying the process parameters for each processed cube. Although the relative densities of the initial builds were not dramatically low, micro-cracks were present in all of them, mostly evolved on a selective number of grain boundaries and spanning only across a single laser path. Detailed modelling and advanced characterization techniques were employed to understand the root cause and cracking mechanism. It was found that the grain boundary precipitates are responsible for crack initiation, amid stress gradient across the grain boundary due to the adjacent grain orientations. Therefore, the failure mechanism is determined as ductility-dip cracking. Based on the findings, a new process window was defined using elevated temperature and novel scanning strategy. No cracks were observed under the modified processing window, meaning that the material can reliably be processed by laser beam powder bed fusion (PBF-LB).http://www.sciencedirect.com/science/article/pii/S0264127521002094Haynes 282 (H282)Powder Bed Fusion (PBF)Additive Manufacturing (AM)SuperalloyMicro-crack |
| spellingShingle | Robert Otto Vegard Brøtan Patricia A. Carvalho Magnus Reiersen Joachim S. Graff Martin F. Sunding Olav Åsebø Berg Spyros Diplas Amin S. Azar Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technology Materials & Design Haynes 282 (H282) Powder Bed Fusion (PBF) Additive Manufacturing (AM) Superalloy Micro-crack |
| title | Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technology |
| title_full | Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technology |
| title_fullStr | Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technology |
| title_full_unstemmed | Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technology |
| title_short | Roadmap for additive manufacturing of HAYNES® 282® superalloy by laser beam powder bed fusion (PBF-LB) technology |
| title_sort | roadmap for additive manufacturing of haynes r 282 r superalloy by laser beam powder bed fusion pbf lb technology |
| topic | Haynes 282 (H282) Powder Bed Fusion (PBF) Additive Manufacturing (AM) Superalloy Micro-crack |
| url | http://www.sciencedirect.com/science/article/pii/S0264127521002094 |
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