Microstructural, Mechanical, and Tribological Properties of Selective Laser Melted Inconel 718 Alloy: The Influences of Heat Treatment
The present study investigates the microstructural, mechanical, and tribological properties of Inconel 718 alloy produced by selective laser melting (SLM) in relation to heat treatment. The SLM-processed samples received a two-step heat treatment: solutionizing at 1065 °C for 1 h, followed by double...
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2024-12-01
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| author | Ümit Gencay Başcı Egemen Avcu Mertcan Kıraç Ahmet Sever İdris Gökalp Hasan İsmail Yavuz Serkan Oktay Eray Abakay Yasemin Yıldıran Avcu Rıdvan Yamanoğlu |
| author_facet | Ümit Gencay Başcı Egemen Avcu Mertcan Kıraç Ahmet Sever İdris Gökalp Hasan İsmail Yavuz Serkan Oktay Eray Abakay Yasemin Yıldıran Avcu Rıdvan Yamanoğlu |
| author_sort | Ümit Gencay Başcı |
| collection | DOAJ |
| description | The present study investigates the microstructural, mechanical, and tribological properties of Inconel 718 alloy produced by selective laser melting (SLM) in relation to heat treatment. The SLM-processed samples received a two-step heat treatment: solutionizing at 1065 °C for 1 h, followed by double aging at 720 °C for 8 h and 620 °C for 6 h. The as-built sample exhibited a grain structure mostly characterized by fine Laves phases, while the hardening phases γ′ ((Ni<sub>3</sub> (Al, Ti)) and γ″ (Ni<sub>3</sub>Nb) precipitated during the heat treatment. Following heat treatment, a transformation in crystallographic texture and dislocation density occurred, yielding a random texture and reduced dislocation density, particularly in the XZ direction, attributed to the formation of new grains via recrystallization in the microstructure. The grain size in the XY plane decreased following heat treatment, whereas the texture in the <001> direction remained unaffected. The heat-treated samples had significantly higher tensile strength (1330 MPa vs. 960 MPa) and hardness (530 HV vs. 340 HV) relative to the as-built samples. The wear resistance of heat-treated samples surpassed that of the as-built sample due to enhanced mechanical properties resulting from the fine and dispersed γ′ and γ″ precipitates in the microstructure with heat treatment. |
| format | Article |
| id | doaj-art-03c870dcbd3141b69fdc3cf44790ac98 |
| institution | Kabale University |
| issn | 2073-4352 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj-art-03c870dcbd3141b69fdc3cf44790ac982025-01-24T13:28:01ZengMDPI AGCrystals2073-43522024-12-011511810.3390/cryst15010018Microstructural, Mechanical, and Tribological Properties of Selective Laser Melted Inconel 718 Alloy: The Influences of Heat TreatmentÜmit Gencay Başcı0Egemen Avcu1Mertcan Kıraç2Ahmet Sever3İdris Gökalp4Hasan İsmail Yavuz5Serkan Oktay6Eray Abakay7Yasemin Yıldıran Avcu8Rıdvan Yamanoğlu9Department of Metallurgical and Materials Engineering, Kocaeli University, Kocaeli 41001, TurkeyDepartment of Mechanical Engineering, Kocaeli University, Kocaeli 41001, TurkeyR&D Department, ERMAKSAN, Bursa 16065, TurkeyR&D Department, ERMAKSAN, Bursa 16065, TurkeyDepartment of Metallurgical and Materials Engineering, Kocaeli University, Kocaeli 41001, TurkeyDepartment of Metallurgical and Materials Engineering, Kocaeli University, Kocaeli 41001, TurkeyR&D Department, Colakoglu Metalurji, Dilovası, Kocaeli 41455, TurkeyDepartment of Metallurgy and Materials Engineering, Sakarya University, Sakarya 54050, TurkeyDepartment of Mechanical Engineering, Kocaeli University, Kocaeli 41001, TurkeyDepartment of Metallurgical and Materials Engineering, Kocaeli University, Kocaeli 41001, TurkeyThe present study investigates the microstructural, mechanical, and tribological properties of Inconel 718 alloy produced by selective laser melting (SLM) in relation to heat treatment. The SLM-processed samples received a two-step heat treatment: solutionizing at 1065 °C for 1 h, followed by double aging at 720 °C for 8 h and 620 °C for 6 h. The as-built sample exhibited a grain structure mostly characterized by fine Laves phases, while the hardening phases γ′ ((Ni<sub>3</sub> (Al, Ti)) and γ″ (Ni<sub>3</sub>Nb) precipitated during the heat treatment. Following heat treatment, a transformation in crystallographic texture and dislocation density occurred, yielding a random texture and reduced dislocation density, particularly in the XZ direction, attributed to the formation of new grains via recrystallization in the microstructure. The grain size in the XY plane decreased following heat treatment, whereas the texture in the <001> direction remained unaffected. The heat-treated samples had significantly higher tensile strength (1330 MPa vs. 960 MPa) and hardness (530 HV vs. 340 HV) relative to the as-built samples. The wear resistance of heat-treated samples surpassed that of the as-built sample due to enhanced mechanical properties resulting from the fine and dispersed γ′ and γ″ precipitates in the microstructure with heat treatment.https://www.mdpi.com/2073-4352/15/1/183D printingselective laser meltingsuper alloyheat treatmentprecipitation strengthening phasesdeformation mechanism |
| spellingShingle | Ümit Gencay Başcı Egemen Avcu Mertcan Kıraç Ahmet Sever İdris Gökalp Hasan İsmail Yavuz Serkan Oktay Eray Abakay Yasemin Yıldıran Avcu Rıdvan Yamanoğlu Microstructural, Mechanical, and Tribological Properties of Selective Laser Melted Inconel 718 Alloy: The Influences of Heat Treatment Crystals 3D printing selective laser melting super alloy heat treatment precipitation strengthening phases deformation mechanism |
| title | Microstructural, Mechanical, and Tribological Properties of Selective Laser Melted Inconel 718 Alloy: The Influences of Heat Treatment |
| title_full | Microstructural, Mechanical, and Tribological Properties of Selective Laser Melted Inconel 718 Alloy: The Influences of Heat Treatment |
| title_fullStr | Microstructural, Mechanical, and Tribological Properties of Selective Laser Melted Inconel 718 Alloy: The Influences of Heat Treatment |
| title_full_unstemmed | Microstructural, Mechanical, and Tribological Properties of Selective Laser Melted Inconel 718 Alloy: The Influences of Heat Treatment |
| title_short | Microstructural, Mechanical, and Tribological Properties of Selective Laser Melted Inconel 718 Alloy: The Influences of Heat Treatment |
| title_sort | microstructural mechanical and tribological properties of selective laser melted inconel 718 alloy the influences of heat treatment |
| topic | 3D printing selective laser melting super alloy heat treatment precipitation strengthening phases deformation mechanism |
| url | https://www.mdpi.com/2073-4352/15/1/18 |
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