Microstructural evolution and hot cracking prevention in direct-laser-deposited Ni-based superalloy through Hf addition
Additive manufacturing (AM) is an emerging new paradigm in the production of industrial parts since it allows the fabrication of near-net shape products directly from designs, which is impossible with conventional manufacturing techniques. However, hot cracking phenomena in AM are a critical issue w...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S026412752300713X |
| _version_ | 1797647997577723904 |
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| author | KenHee Ryou Hye Ji Im Jiwon Park Pyuck-Pa Choi |
| author_facet | KenHee Ryou Hye Ji Im Jiwon Park Pyuck-Pa Choi |
| author_sort | KenHee Ryou |
| collection | DOAJ |
| description | Additive manufacturing (AM) is an emerging new paradigm in the production of industrial parts since it allows the fabrication of near-net shape products directly from designs, which is impossible with conventional manufacturing techniques. However, hot cracking phenomena in AM are a critical issue with non-weldable alloys, rendering manufactured parts unusable. There are solutions to this problem, such as alloying Hf with non-weldable Ni-based superalloys to improve cracking resistibility. Although this solution was proposed a few decades ago, the mechanisms of how Hf could prevent hot cracking in Ni-based superalloys have not been clarified in detail, until now. In this study, we revealed the Hf-driven microstructural changes in direct-laser-deposited Ni-based superalloys using various characterization techniques and phase-field simulations. Moreover, the calculated thermal strain and cracking susceptibility decreased with the Hf addition. The results demonstrated that Hf induced specific solidifying processes and resulting microstructural changes that are advantageous to the prevention of hot cracking. |
| first_indexed | 2024-03-11T15:24:46Z |
| format | Article |
| id | doaj.art-fc76474dcfba4dbe8325f2db5e9b3b04 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-11T15:24:46Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-fc76474dcfba4dbe8325f2db5e9b3b042023-10-28T05:06:22ZengElsevierMaterials & Design0264-12752023-10-01234112298Microstructural evolution and hot cracking prevention in direct-laser-deposited Ni-based superalloy through Hf additionKenHee Ryou0Hye Ji Im1Jiwon Park2Pyuck-Pa Choi3Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 34141 Daejeon, Republic of KoreaDepartment of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 34141 Daejeon, Republic of Korea; Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USAKorea Institute of Materials Science, Changwon 51508, Republic of Korea; Corresponding authors.Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 34141 Daejeon, Republic of Korea; Corresponding authors.Additive manufacturing (AM) is an emerging new paradigm in the production of industrial parts since it allows the fabrication of near-net shape products directly from designs, which is impossible with conventional manufacturing techniques. However, hot cracking phenomena in AM are a critical issue with non-weldable alloys, rendering manufactured parts unusable. There are solutions to this problem, such as alloying Hf with non-weldable Ni-based superalloys to improve cracking resistibility. Although this solution was proposed a few decades ago, the mechanisms of how Hf could prevent hot cracking in Ni-based superalloys have not been clarified in detail, until now. In this study, we revealed the Hf-driven microstructural changes in direct-laser-deposited Ni-based superalloys using various characterization techniques and phase-field simulations. Moreover, the calculated thermal strain and cracking susceptibility decreased with the Hf addition. The results demonstrated that Hf induced specific solidifying processes and resulting microstructural changes that are advantageous to the prevention of hot cracking.http://www.sciencedirect.com/science/article/pii/S026412752300713XNi-based superalloyHot crackingAdditive manufacturingPhase-field modeling |
| spellingShingle | KenHee Ryou Hye Ji Im Jiwon Park Pyuck-Pa Choi Microstructural evolution and hot cracking prevention in direct-laser-deposited Ni-based superalloy through Hf addition Materials & Design Ni-based superalloy Hot cracking Additive manufacturing Phase-field modeling |
| title | Microstructural evolution and hot cracking prevention in direct-laser-deposited Ni-based superalloy through Hf addition |
| title_full | Microstructural evolution and hot cracking prevention in direct-laser-deposited Ni-based superalloy through Hf addition |
| title_fullStr | Microstructural evolution and hot cracking prevention in direct-laser-deposited Ni-based superalloy through Hf addition |
| title_full_unstemmed | Microstructural evolution and hot cracking prevention in direct-laser-deposited Ni-based superalloy through Hf addition |
| title_short | Microstructural evolution and hot cracking prevention in direct-laser-deposited Ni-based superalloy through Hf addition |
| title_sort | microstructural evolution and hot cracking prevention in direct laser deposited ni based superalloy through hf addition |
| topic | Ni-based superalloy Hot cracking Additive manufacturing Phase-field modeling |
| url | http://www.sciencedirect.com/science/article/pii/S026412752300713X |
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