Microstructural Evolution and Mechanical Behavior of TA15 Titanium Alloy Fabricated by Selective Laser Melting: Influence of Solution Treatment and Aging
In this study, TA15 titanium alloys were successfully prepared using selective laser melting (SLM). The results show that the microstructure of each TA15 specimen is composed of a large number of acicular α’ martensite crystals accompanied by a lot of dislocations and twin structures in the martensi...
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MDPI AG
2023-08-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/9/1514 |
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| author | Qing Wang Binquan Jin Lizhong Zhao Xiaolian Liu Anjian Pan Xuefeng Ding Wei Gao Yufeng Song Xuefeng Zhang |
| author_facet | Qing Wang Binquan Jin Lizhong Zhao Xiaolian Liu Anjian Pan Xuefeng Ding Wei Gao Yufeng Song Xuefeng Zhang |
| author_sort | Qing Wang |
| collection | DOAJ |
| description | In this study, TA15 titanium alloys were successfully prepared using selective laser melting (SLM). The results show that the microstructure of each TA15 specimen is composed of a large number of acicular α’ martensite crystals accompanied by a lot of dislocations and twin structures in the martensite due to non-equilibrium heating and cooling via SLM. After solution treatment and aging treatment, the martensite structure is successfully transformed into a typical duplex structure and an equiaxial structure. When there is an increase in the solution temperature, the size of the equiaxed primary α phase and the elongation of the specimen gradually increases, while the thickness of the layered secondary α phase and the tensile strength of the specimen decreases accordingly. After solution treatment at 1000 °C, the specimens show the best comprehensive mechanical properties, i.e., a high-temperature tensile strength of 715 MPa and a corresponding elongation of 24.5%. Subsequently, an appropriate solution–aging treatment is proposed to improve the high-temperature mechanical properties of SLMed TA15 titanium alloys in aerospace. |
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| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T22:28:23Z |
| publishDate | 2023-08-01 |
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| series | Metals |
| spelling | doaj.art-d62dc449f96c4e129a4f9cef15a8800c2023-11-19T11:56:01ZengMDPI AGMetals2075-47012023-08-01139151410.3390/met13091514Microstructural Evolution and Mechanical Behavior of TA15 Titanium Alloy Fabricated by Selective Laser Melting: Influence of Solution Treatment and AgingQing Wang0Binquan Jin1Lizhong Zhao2Xiaolian Liu3Anjian Pan4Xuefeng Ding5Wei Gao6Yufeng Song7Xuefeng Zhang8Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, ChinaInstitute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, ChinaInstitute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, ChinaInstitute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, ChinaInstitute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, ChinaCollege of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaCollege of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaCollege of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaInstitute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, ChinaIn this study, TA15 titanium alloys were successfully prepared using selective laser melting (SLM). The results show that the microstructure of each TA15 specimen is composed of a large number of acicular α’ martensite crystals accompanied by a lot of dislocations and twin structures in the martensite due to non-equilibrium heating and cooling via SLM. After solution treatment and aging treatment, the martensite structure is successfully transformed into a typical duplex structure and an equiaxial structure. When there is an increase in the solution temperature, the size of the equiaxed primary α phase and the elongation of the specimen gradually increases, while the thickness of the layered secondary α phase and the tensile strength of the specimen decreases accordingly. After solution treatment at 1000 °C, the specimens show the best comprehensive mechanical properties, i.e., a high-temperature tensile strength of 715 MPa and a corresponding elongation of 24.5%. Subsequently, an appropriate solution–aging treatment is proposed to improve the high-temperature mechanical properties of SLMed TA15 titanium alloys in aerospace.https://www.mdpi.com/2075-4701/13/9/1514SLMsolution and aging treatmentmechanical propertiesTA15 titanium alloy |
| spellingShingle | Qing Wang Binquan Jin Lizhong Zhao Xiaolian Liu Anjian Pan Xuefeng Ding Wei Gao Yufeng Song Xuefeng Zhang Microstructural Evolution and Mechanical Behavior of TA15 Titanium Alloy Fabricated by Selective Laser Melting: Influence of Solution Treatment and Aging Metals SLM solution and aging treatment mechanical properties TA15 titanium alloy |
| title | Microstructural Evolution and Mechanical Behavior of TA15 Titanium Alloy Fabricated by Selective Laser Melting: Influence of Solution Treatment and Aging |
| title_full | Microstructural Evolution and Mechanical Behavior of TA15 Titanium Alloy Fabricated by Selective Laser Melting: Influence of Solution Treatment and Aging |
| title_fullStr | Microstructural Evolution and Mechanical Behavior of TA15 Titanium Alloy Fabricated by Selective Laser Melting: Influence of Solution Treatment and Aging |
| title_full_unstemmed | Microstructural Evolution and Mechanical Behavior of TA15 Titanium Alloy Fabricated by Selective Laser Melting: Influence of Solution Treatment and Aging |
| title_short | Microstructural Evolution and Mechanical Behavior of TA15 Titanium Alloy Fabricated by Selective Laser Melting: Influence of Solution Treatment and Aging |
| title_sort | microstructural evolution and mechanical behavior of ta15 titanium alloy fabricated by selective laser melting influence of solution treatment and aging |
| topic | SLM solution and aging treatment mechanical properties TA15 titanium alloy |
| url | https://www.mdpi.com/2075-4701/13/9/1514 |
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