Recrystallization and grain growth kinetics of IN718 manufactured by laser powder bed fusion
The recrystallization and grain growth behaviour of IN718 alloy additively manufactured by laser powder bed fusion (L-PBF) is presented herein. The effects of three different temperatures (1050, 1150 and 1250 °C) and holding times (15, 45 and 90 min) were investigated. The texture evolution of the s...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422010183 |
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| author | Merve Nur Doğu Kemal Davut Muhannad Ahmed Obeidi Mustafa Alp Yalçın Hengfeng Gu Thaddeus Song En Low Jon Ginn Dermot Brabazon |
| author_facet | Merve Nur Doğu Kemal Davut Muhannad Ahmed Obeidi Mustafa Alp Yalçın Hengfeng Gu Thaddeus Song En Low Jon Ginn Dermot Brabazon |
| author_sort | Merve Nur Doğu |
| collection | DOAJ |
| description | The recrystallization and grain growth behaviour of IN718 alloy additively manufactured by laser powder bed fusion (L-PBF) is presented herein. The effects of three different temperatures (1050, 1150 and 1250 °C) and holding times (15, 45 and 90 min) were investigated. The texture evolution of the samples was recorded via electron backscatter diffraction (EBSD). The as-built sample is composed of bowl-shaped melt pools, a chessboard-like grain pattern and has a cube texture {100}<001>. Recrystallized grains were observed in the samples treated at 1150 °C for 15 min, as well as the samples treated for longer periods and at higher temperatures. Recrystallization was observed to start from high dislocation density regions, including the overlapping melt pools and the borders of the chessboard-like pattern. The initial cube texture transforms into a first-generation cube-twin texture {122}<212> via a twinning-assisted recrystallization mechanism. Then, those recrystallization nuclei sweep through the high defect density matrix; during which almost no new twins are formed. The samples treated at 1250 °C are almost completely recrystallized, which forms a weaker cube texture and a stronger P-orientation {011}<112>. However, the growth of recrystallized grains is very limited due to the presence of non-coherent precipitates. |
| first_indexed | 2024-12-10T18:17:13Z |
| format | Article |
| id | doaj.art-2ee106a5cf8540f59f1d88b0c298e25f |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-10T18:17:13Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-2ee106a5cf8540f59f1d88b0c298e25f2022-12-22T01:38:18ZengElsevierJournal of Materials Research and Technology2238-78542022-07-011942424257Recrystallization and grain growth kinetics of IN718 manufactured by laser powder bed fusionMerve Nur Doğu0Kemal Davut1Muhannad Ahmed Obeidi2Mustafa Alp Yalçın3Hengfeng Gu4Thaddeus Song En Low5Jon Ginn6Dermot Brabazon7I-Form Advanced Manufacturing Research Centre, Dublin City University, Dublin, Ireland; School of Mechanical & Manufacturing Engineering, Dublin City University, Dublin, Ireland; Advanced Processing Technology Research Centre, Dublin City University, Dublin, Ireland; Corresponding author.Department of Materials Science and Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, TurkeyI-Form Advanced Manufacturing Research Centre, Dublin City University, Dublin, Ireland; School of Mechanical & Manufacturing Engineering, Dublin City University, Dublin, Ireland; Advanced Processing Technology Research Centre, Dublin City University, Dublin, IrelandMetal Forming Center of Excellence, Atılım University, Ankara, TurkeyAnsys Inc., 1441 W Ute Blvd, Suite 335, Park City, UT 84098, USAAnsys Inc., 1441 W Ute Blvd, Suite 335, Park City, UT 84098, USAAnsys Inc., 1441 W Ute Blvd, Suite 335, Park City, UT 84098, USAI-Form Advanced Manufacturing Research Centre, Dublin City University, Dublin, Ireland; School of Mechanical & Manufacturing Engineering, Dublin City University, Dublin, Ireland; Advanced Processing Technology Research Centre, Dublin City University, Dublin, IrelandThe recrystallization and grain growth behaviour of IN718 alloy additively manufactured by laser powder bed fusion (L-PBF) is presented herein. The effects of three different temperatures (1050, 1150 and 1250 °C) and holding times (15, 45 and 90 min) were investigated. The texture evolution of the samples was recorded via electron backscatter diffraction (EBSD). The as-built sample is composed of bowl-shaped melt pools, a chessboard-like grain pattern and has a cube texture {100}<001>. Recrystallized grains were observed in the samples treated at 1150 °C for 15 min, as well as the samples treated for longer periods and at higher temperatures. Recrystallization was observed to start from high dislocation density regions, including the overlapping melt pools and the borders of the chessboard-like pattern. The initial cube texture transforms into a first-generation cube-twin texture {122}<212> via a twinning-assisted recrystallization mechanism. Then, those recrystallization nuclei sweep through the high defect density matrix; during which almost no new twins are formed. The samples treated at 1250 °C are almost completely recrystallized, which forms a weaker cube texture and a stronger P-orientation {011}<112>. However, the growth of recrystallized grains is very limited due to the presence of non-coherent precipitates.http://www.sciencedirect.com/science/article/pii/S2238785422010183IN718Laser powder bed fusionSolution heat treatmentMicrostructureTextureRecrystallization |
| spellingShingle | Merve Nur Doğu Kemal Davut Muhannad Ahmed Obeidi Mustafa Alp Yalçın Hengfeng Gu Thaddeus Song En Low Jon Ginn Dermot Brabazon Recrystallization and grain growth kinetics of IN718 manufactured by laser powder bed fusion Journal of Materials Research and Technology IN718 Laser powder bed fusion Solution heat treatment Microstructure Texture Recrystallization |
| title | Recrystallization and grain growth kinetics of IN718 manufactured by laser powder bed fusion |
| title_full | Recrystallization and grain growth kinetics of IN718 manufactured by laser powder bed fusion |
| title_fullStr | Recrystallization and grain growth kinetics of IN718 manufactured by laser powder bed fusion |
| title_full_unstemmed | Recrystallization and grain growth kinetics of IN718 manufactured by laser powder bed fusion |
| title_short | Recrystallization and grain growth kinetics of IN718 manufactured by laser powder bed fusion |
| title_sort | recrystallization and grain growth kinetics of in718 manufactured by laser powder bed fusion |
| topic | IN718 Laser powder bed fusion Solution heat treatment Microstructure Texture Recrystallization |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422010183 |
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