Understanding of microstructure and mechanical properties of heat-treated Ti3SiC2/Inconel 625 matrix composites manufactured by laser-directed energy deposition
To enhance the metal components by laser-directed energy deposition (LDED), adding reinforcement particles and exerting post treatments are widely identified as the two effective methods. However, how post heat treatments influence the performance of precipitated particle reinforced metal composites...
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Elsevier
2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425009640 |
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| author | Yikun Chen Yongkang Xiao Chunming Wang Fei Yan Yiyang Hu Zehui Liu |
| author_facet | Yikun Chen Yongkang Xiao Chunming Wang Fei Yan Yiyang Hu Zehui Liu |
| author_sort | Yikun Chen |
| collection | DOAJ |
| description | To enhance the metal components by laser-directed energy deposition (LDED), adding reinforcement particles and exerting post treatments are widely identified as the two effective methods. However, how post heat treatments influence the performance of precipitated particle reinforced metal composites acquired by laser additive manufacturing (AM) processes has rarely been investigated. In this work, Inconel 625 matrix composite reinforced by Ti3SiC2 particles was manufactured using LDED. The microstructure and mechanical property of LDED-produced composite were experimentally investigated under three heat treatments including solid solution treatment (SST), aging treatment (AT) and solid solution plus aging treatment (SSAT). The results showed that after solid solution treatment at 1150 °C for 2 h, the Laves phase and carbide redissolved, and recrystallization took place within the material, thus improving the plasticity of the composites. After aging treatment at 700 °C for 24 h, a large number of carbide phases precipitated in the composite material, subsequently resulting in greatly improving the hardness and tensile strength and reducing the elongation. However, solid–solid phase transition occurred during the aging process at 800 °C, and a large number of acicular δ phases were precipitated between the dendritic arms, which led to a reduction in the strength and plasticity of the composite. After solid solution plus aging treatment, the comprehensive mechanical properties of Ti3SiC2/IN625 composites were significantly improved. The improvement of comprehensive mechanical properties in Ti3SiC2/Inconel 625 composite was the co-strengthening results of dispersed particles in the crystals and massive and granular carbides that precipitated at grain boundaries. |
| format | Article |
| id | doaj-art-42b41a48a80e4dc78171b6a13ba2ab4b |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-42b41a48a80e4dc78171b6a13ba2ab4b2025-08-20T02:17:29ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01364098411110.1016/j.jmrt.2025.04.147Understanding of microstructure and mechanical properties of heat-treated Ti3SiC2/Inconel 625 matrix composites manufactured by laser-directed energy depositionYikun Chen0Yongkang Xiao1Chunming Wang2Fei Yan3Yiyang Hu4Zehui Liu5School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Automobile Engineering, Wuhan University of Technology, Wuhan 430070, China; Corresponding author.School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaTo enhance the metal components by laser-directed energy deposition (LDED), adding reinforcement particles and exerting post treatments are widely identified as the two effective methods. However, how post heat treatments influence the performance of precipitated particle reinforced metal composites acquired by laser additive manufacturing (AM) processes has rarely been investigated. In this work, Inconel 625 matrix composite reinforced by Ti3SiC2 particles was manufactured using LDED. The microstructure and mechanical property of LDED-produced composite were experimentally investigated under three heat treatments including solid solution treatment (SST), aging treatment (AT) and solid solution plus aging treatment (SSAT). The results showed that after solid solution treatment at 1150 °C for 2 h, the Laves phase and carbide redissolved, and recrystallization took place within the material, thus improving the plasticity of the composites. After aging treatment at 700 °C for 24 h, a large number of carbide phases precipitated in the composite material, subsequently resulting in greatly improving the hardness and tensile strength and reducing the elongation. However, solid–solid phase transition occurred during the aging process at 800 °C, and a large number of acicular δ phases were precipitated between the dendritic arms, which led to a reduction in the strength and plasticity of the composite. After solid solution plus aging treatment, the comprehensive mechanical properties of Ti3SiC2/IN625 composites were significantly improved. The improvement of comprehensive mechanical properties in Ti3SiC2/Inconel 625 composite was the co-strengthening results of dispersed particles in the crystals and massive and granular carbides that precipitated at grain boundaries.http://www.sciencedirect.com/science/article/pii/S2238785425009640Laser-directed energy depositionTi3SiC2/Inconel 625 matrix compositesHeat treatment processesMicrostructureMechanical property |
| spellingShingle | Yikun Chen Yongkang Xiao Chunming Wang Fei Yan Yiyang Hu Zehui Liu Understanding of microstructure and mechanical properties of heat-treated Ti3SiC2/Inconel 625 matrix composites manufactured by laser-directed energy deposition Journal of Materials Research and Technology Laser-directed energy deposition Ti3SiC2/Inconel 625 matrix composites Heat treatment processes Microstructure Mechanical property |
| title | Understanding of microstructure and mechanical properties of heat-treated Ti3SiC2/Inconel 625 matrix composites manufactured by laser-directed energy deposition |
| title_full | Understanding of microstructure and mechanical properties of heat-treated Ti3SiC2/Inconel 625 matrix composites manufactured by laser-directed energy deposition |
| title_fullStr | Understanding of microstructure and mechanical properties of heat-treated Ti3SiC2/Inconel 625 matrix composites manufactured by laser-directed energy deposition |
| title_full_unstemmed | Understanding of microstructure and mechanical properties of heat-treated Ti3SiC2/Inconel 625 matrix composites manufactured by laser-directed energy deposition |
| title_short | Understanding of microstructure and mechanical properties of heat-treated Ti3SiC2/Inconel 625 matrix composites manufactured by laser-directed energy deposition |
| title_sort | understanding of microstructure and mechanical properties of heat treated ti3sic2 inconel 625 matrix composites manufactured by laser directed energy deposition |
| topic | Laser-directed energy deposition Ti3SiC2/Inconel 625 matrix composites Heat treatment processes Microstructure Mechanical property |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425009640 |
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