Multiple, comparative heat treatment and aging schedules for controlling the microstructures and mechanical properties of laser powder bed fusion fabricated AlSi10Mg alloy
In this investigation, the optimization of mechanical properties with thermal post-processing treatments was analyzed across a wide range of variants. A major aspect of additive manufacturing is the correlation between heat treatments and the effects on the mechanical properties and microstructure o...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785421004063 |
| _version_ | 1818617738522787840 |
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| author | Jorge Merino Bryan Ruvalcaba Jaime Varela Edel Arrieta Lawrence E. Murr Ryan B. Wicker Mark Benedict Francisco Medina |
| author_facet | Jorge Merino Bryan Ruvalcaba Jaime Varela Edel Arrieta Lawrence E. Murr Ryan B. Wicker Mark Benedict Francisco Medina |
| author_sort | Jorge Merino |
| collection | DOAJ |
| description | In this investigation, the optimization of mechanical properties with thermal post-processing treatments was analyzed across a wide range of variants. A major aspect of additive manufacturing is the correlation between heat treatments and the effects on the mechanical properties and microstructure of the printed materials. Therefore, the present paper describes a comprehensive overview of post-process heat treatments for Laser Powder Bed Fusion fabricated AlSi10Mg alloy consisting of stress relief anneals at 190 ̊C and 285 ̊C for 2 h, hot isostatic pressing at 515 ̊C for 3 h, hot isostatic pressing + T6 treatment for 6 h, and final aging of each of these conditions at 177 ̊C for up to 1000 h. This has resulted in 40 experimental variants: 20 in the vertical and 20 in the horizontal tensile direction. After tensile testing, the resulting mechanical properties (ultimate tensile strength, yield strength, and elongation) and stress–strain curves are analyzed for comparison between all variants. Ultra-fine cellular, micro dendritic structures (0.6–1.2 μm) along with melt-band structures dominated the asbuilt and stress relief anneal conditions. In contrast, hot isostatic pressing and hot isostatic pressing + T6 conditions were dominated by ~10 μm, equiaxed, recrystallized grain structures and pseudo-eutectic silicon particles with varying sizes and size distributions. Microhardness and fractography results also corresponded to their specific heat treatment and microstructure. The comparison and correlation of the heat treatments are presented to help advance the selection of design strategies for high performance applications. |
| first_indexed | 2024-12-16T17:10:28Z |
| format | Article |
| id | doaj.art-b7036804788f4d30bdb31329fdeabdfd |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-16T17:10:28Z |
| publishDate | 2021-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-b7036804788f4d30bdb31329fdeabdfd2022-12-21T22:23:25ZengElsevierJournal of Materials Research and Technology2238-78542021-07-0113669685Multiple, comparative heat treatment and aging schedules for controlling the microstructures and mechanical properties of laser powder bed fusion fabricated AlSi10Mg alloyJorge Merino0Bryan Ruvalcaba1Jaime Varela2Edel Arrieta3Lawrence E. Murr4Ryan B. Wicker5Mark Benedict6Francisco Medina7Department of Metallurgical, Materials and Biomedical Engineering, The University of Texas at El Paso, El Paso, TX, 79968, USA; W.M. Keck Center for 3D Innovation, University of Texas at El Paso, El Paso, Tx, 79968, USAW.M. Keck Center for 3D Innovation, University of Texas at El Paso, El Paso, Tx, 79968, USA; Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX, 79968, USAW.M. Keck Center for 3D Innovation, University of Texas at El Paso, El Paso, Tx, 79968, USA; Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX, 79968, USAW.M. Keck Center for 3D Innovation, University of Texas at El Paso, El Paso, Tx, 79968, USA; Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX, 79968, USADepartment of Metallurgical, Materials and Biomedical Engineering, The University of Texas at El Paso, El Paso, TX, 79968, USA; W.M. Keck Center for 3D Innovation, University of Texas at El Paso, El Paso, Tx, 79968, USAW.M. Keck Center for 3D Innovation, University of Texas at El Paso, El Paso, Tx, 79968, USA; Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX, 79968, USAAir Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, OH, 45433, USAW.M. Keck Center for 3D Innovation, University of Texas at El Paso, El Paso, Tx, 79968, USA; Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX, 79968, USA; Corresponding author.In this investigation, the optimization of mechanical properties with thermal post-processing treatments was analyzed across a wide range of variants. A major aspect of additive manufacturing is the correlation between heat treatments and the effects on the mechanical properties and microstructure of the printed materials. Therefore, the present paper describes a comprehensive overview of post-process heat treatments for Laser Powder Bed Fusion fabricated AlSi10Mg alloy consisting of stress relief anneals at 190 ̊C and 285 ̊C for 2 h, hot isostatic pressing at 515 ̊C for 3 h, hot isostatic pressing + T6 treatment for 6 h, and final aging of each of these conditions at 177 ̊C for up to 1000 h. This has resulted in 40 experimental variants: 20 in the vertical and 20 in the horizontal tensile direction. After tensile testing, the resulting mechanical properties (ultimate tensile strength, yield strength, and elongation) and stress–strain curves are analyzed for comparison between all variants. Ultra-fine cellular, micro dendritic structures (0.6–1.2 μm) along with melt-band structures dominated the asbuilt and stress relief anneal conditions. In contrast, hot isostatic pressing and hot isostatic pressing + T6 conditions were dominated by ~10 μm, equiaxed, recrystallized grain structures and pseudo-eutectic silicon particles with varying sizes and size distributions. Microhardness and fractography results also corresponded to their specific heat treatment and microstructure. The comparison and correlation of the heat treatments are presented to help advance the selection of design strategies for high performance applications.http://www.sciencedirect.com/science/article/pii/S2238785421004063AlSi10 Mg alloyLaser Powder Bed FusionHeat treatmentsMicrostructure analysisMechanical propertiesHardness |
| spellingShingle | Jorge Merino Bryan Ruvalcaba Jaime Varela Edel Arrieta Lawrence E. Murr Ryan B. Wicker Mark Benedict Francisco Medina Multiple, comparative heat treatment and aging schedules for controlling the microstructures and mechanical properties of laser powder bed fusion fabricated AlSi10Mg alloy Journal of Materials Research and Technology AlSi10 Mg alloy Laser Powder Bed Fusion Heat treatments Microstructure analysis Mechanical properties Hardness |
| title | Multiple, comparative heat treatment and aging schedules for controlling the microstructures and mechanical properties of laser powder bed fusion fabricated AlSi10Mg alloy |
| title_full | Multiple, comparative heat treatment and aging schedules for controlling the microstructures and mechanical properties of laser powder bed fusion fabricated AlSi10Mg alloy |
| title_fullStr | Multiple, comparative heat treatment and aging schedules for controlling the microstructures and mechanical properties of laser powder bed fusion fabricated AlSi10Mg alloy |
| title_full_unstemmed | Multiple, comparative heat treatment and aging schedules for controlling the microstructures and mechanical properties of laser powder bed fusion fabricated AlSi10Mg alloy |
| title_short | Multiple, comparative heat treatment and aging schedules for controlling the microstructures and mechanical properties of laser powder bed fusion fabricated AlSi10Mg alloy |
| title_sort | multiple comparative heat treatment and aging schedules for controlling the microstructures and mechanical properties of laser powder bed fusion fabricated alsi10mg alloy |
| topic | AlSi10 Mg alloy Laser Powder Bed Fusion Heat treatments Microstructure analysis Mechanical properties Hardness |
| url | http://www.sciencedirect.com/science/article/pii/S2238785421004063 |
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