A novel method enhanced mechanical properties of a selective laser melted Mar-M247 superalloy by progressive remelting
A novel method has been proposed to avoid the cracks in the Mar-M247 alloy manufactured via selective laser melting (SLM) related to high cooling rate interacted with carbides and eutectics, i.e., progressive remelting used to design the temperature field reducing the thermal stresses in SLM process...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424024542 |
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| author | Liyu Li Tao Dong Fengchun Jiang Yi Ru Chunhuan Guo Mingxia Diao Haolun Song |
| author_facet | Liyu Li Tao Dong Fengchun Jiang Yi Ru Chunhuan Guo Mingxia Diao Haolun Song |
| author_sort | Liyu Li |
| collection | DOAJ |
| description | A novel method has been proposed to avoid the cracks in the Mar-M247 alloy manufactured via selective laser melting (SLM) related to high cooling rate interacted with carbides and eutectics, i.e., progressive remelting used to design the temperature field reducing the thermal stresses in SLM process. The microstructure evolves from a partly fused state to a completely solid block during progressive remelting, and those cracks inhibit effectively. The temperature gradient is gradually reduced in the process of progressive remelting, and eventually 29% lower than that in original SLM process. Quantitative temperature-field analysis signifies a substantial decrease in the cooling rate during manufacturing via progressive remelting, which explains crack inhibition. Compared to the original SLM-built Mar-M247, progressive remelting leads to a 35.1% increase in ultimate tensile strength (UTS) at RT. The UTS and elongation of progressive remelted Mar-M247 exhibit 747.2 MPa and 6.1% at 900 °C, respectively, superior to that of materials fabricated by casting and heat-treatment. This work helps further comprehend the relationship of volumetric energy density - thermal gradient - cooling rate - microstructure - mechanical properties, especially utilizing accumulative input energy to control temperature field, and offers a new opportunity to non-weldable superalloys fabricated in commercially available SLM systems. |
| format | Article |
| id | doaj-art-898d3d311b4f48c0b98fe0dc1922a4aa |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-898d3d311b4f48c0b98fe0dc1922a4aa2025-08-20T02:39:03ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01334968498010.1016/j.jmrt.2024.10.182A novel method enhanced mechanical properties of a selective laser melted Mar-M247 superalloy by progressive remeltingLiyu Li0Tao Dong1Fengchun Jiang2Yi Ru3Chunhuan Guo4Mingxia Diao5Haolun Song6Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, ChinaKey Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China; Yantai Research Institute and Graduate School of Harbin Engineering University, Yantai, 264006, China; Corresponding author. Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China.Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China; Yantai Research Institute and Graduate School of Harbin Engineering University, Yantai, 264006, ChinaResearch Institute for Frontier Science, Beihang University, Beijing, 100191, ChinaKey Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China; Yantai Research Institute and Graduate School of Harbin Engineering University, Yantai, 264006, China; Corresponding author. Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China.Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, ChinaKey Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, ChinaA novel method has been proposed to avoid the cracks in the Mar-M247 alloy manufactured via selective laser melting (SLM) related to high cooling rate interacted with carbides and eutectics, i.e., progressive remelting used to design the temperature field reducing the thermal stresses in SLM process. The microstructure evolves from a partly fused state to a completely solid block during progressive remelting, and those cracks inhibit effectively. The temperature gradient is gradually reduced in the process of progressive remelting, and eventually 29% lower than that in original SLM process. Quantitative temperature-field analysis signifies a substantial decrease in the cooling rate during manufacturing via progressive remelting, which explains crack inhibition. Compared to the original SLM-built Mar-M247, progressive remelting leads to a 35.1% increase in ultimate tensile strength (UTS) at RT. The UTS and elongation of progressive remelted Mar-M247 exhibit 747.2 MPa and 6.1% at 900 °C, respectively, superior to that of materials fabricated by casting and heat-treatment. This work helps further comprehend the relationship of volumetric energy density - thermal gradient - cooling rate - microstructure - mechanical properties, especially utilizing accumulative input energy to control temperature field, and offers a new opportunity to non-weldable superalloys fabricated in commercially available SLM systems.http://www.sciencedirect.com/science/article/pii/S2238785424024542Selective laser meltingMar-M247 superalloyTemperature field evolutionCracking inhibitionHigh-temperature mechanical properties |
| spellingShingle | Liyu Li Tao Dong Fengchun Jiang Yi Ru Chunhuan Guo Mingxia Diao Haolun Song A novel method enhanced mechanical properties of a selective laser melted Mar-M247 superalloy by progressive remelting Journal of Materials Research and Technology Selective laser melting Mar-M247 superalloy Temperature field evolution Cracking inhibition High-temperature mechanical properties |
| title | A novel method enhanced mechanical properties of a selective laser melted Mar-M247 superalloy by progressive remelting |
| title_full | A novel method enhanced mechanical properties of a selective laser melted Mar-M247 superalloy by progressive remelting |
| title_fullStr | A novel method enhanced mechanical properties of a selective laser melted Mar-M247 superalloy by progressive remelting |
| title_full_unstemmed | A novel method enhanced mechanical properties of a selective laser melted Mar-M247 superalloy by progressive remelting |
| title_short | A novel method enhanced mechanical properties of a selective laser melted Mar-M247 superalloy by progressive remelting |
| title_sort | novel method enhanced mechanical properties of a selective laser melted mar m247 superalloy by progressive remelting |
| topic | Selective laser melting Mar-M247 superalloy Temperature field evolution Cracking inhibition High-temperature mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424024542 |
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