Tailoring the Microstructure of Laser-Additive-Manufactured Titanium Aluminide Alloys via In Situ Alloying and Parameter Variation
Titanium aluminide (TiAl) alloys have emerged as promising materials for high-temperature applications due to their unique combination of high-temperature strength, low density, and excellent oxidation resistance. However, the fabrication of TiAl alloys using conventional methods is challenging due...
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| Format: | Article |
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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/2075-4701/13/8/1429 |
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| author | Igor Polozov Victoria Sokolova Anna Gracheva Anatoly Popovich |
| author_facet | Igor Polozov Victoria Sokolova Anna Gracheva Anatoly Popovich |
| author_sort | Igor Polozov |
| collection | DOAJ |
| description | Titanium aluminide (TiAl) alloys have emerged as promising materials for high-temperature applications due to their unique combination of high-temperature strength, low density, and excellent oxidation resistance. However, the fabrication of TiAl alloys using conventional methods is challenging due to their high melting points and limited ductility. Selective laser melting (SLM), an additive manufacturing technique, offers a viable solution for producing TiAl alloys with intricate geometries and the potential for tailoring their microstructure. This study investigates the effect of in situ copper alloying and multiple laser scans on the microstructure and mechanical properties of TiAl-based alloys fabricated using SLM. The results demonstrate that copper alloying enhances the formation of the α<sub>2</sub>-Ti<sub>3</sub>Al phase, refines the microstructure, and improves the mechanical properties of TiAl alloys. Multiple laser scans allow for the creation of distinct microstructural regions within a single component, enabling the tailoring of properties that are suitable for specific operating conditions. The findings provide valuable insights into the fabrication and optimization of TiAl intermetallic alloys with diverse applications. |
| first_indexed | 2024-03-10T23:44:21Z |
| format | Article |
| id | doaj.art-24890b505dba4638b4c345ca9026ee26 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T23:44:21Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-24890b505dba4638b4c345ca9026ee262023-11-19T02:11:04ZengMDPI AGMetals2075-47012023-08-01138142910.3390/met13081429Tailoring the Microstructure of Laser-Additive-Manufactured Titanium Aluminide Alloys via In Situ Alloying and Parameter VariationIgor Polozov0Victoria Sokolova1Anna Gracheva2Anatoly Popovich3Institute of Mechanical Engineering, Materials, and Transport, Peter the Great St. Petersburg Polytechnic University (SPbPU), Polytechnicheskaya, 29, St. Petersburg 195251, RussiaInstitute of Mechanical Engineering, Materials, and Transport, Peter the Great St. Petersburg Polytechnic University (SPbPU), Polytechnicheskaya, 29, St. Petersburg 195251, RussiaInstitute of Mechanical Engineering, Materials, and Transport, Peter the Great St. Petersburg Polytechnic University (SPbPU), Polytechnicheskaya, 29, St. Petersburg 195251, RussiaInstitute of Mechanical Engineering, Materials, and Transport, Peter the Great St. Petersburg Polytechnic University (SPbPU), Polytechnicheskaya, 29, St. Petersburg 195251, RussiaTitanium aluminide (TiAl) alloys have emerged as promising materials for high-temperature applications due to their unique combination of high-temperature strength, low density, and excellent oxidation resistance. However, the fabrication of TiAl alloys using conventional methods is challenging due to their high melting points and limited ductility. Selective laser melting (SLM), an additive manufacturing technique, offers a viable solution for producing TiAl alloys with intricate geometries and the potential for tailoring their microstructure. This study investigates the effect of in situ copper alloying and multiple laser scans on the microstructure and mechanical properties of TiAl-based alloys fabricated using SLM. The results demonstrate that copper alloying enhances the formation of the α<sub>2</sub>-Ti<sub>3</sub>Al phase, refines the microstructure, and improves the mechanical properties of TiAl alloys. Multiple laser scans allow for the creation of distinct microstructural regions within a single component, enabling the tailoring of properties that are suitable for specific operating conditions. The findings provide valuable insights into the fabrication and optimization of TiAl intermetallic alloys with diverse applications.https://www.mdpi.com/2075-4701/13/8/1429titanium aluminideadditive manufacturingin situ alloyingselective laser meltingTi4822 |
| spellingShingle | Igor Polozov Victoria Sokolova Anna Gracheva Anatoly Popovich Tailoring the Microstructure of Laser-Additive-Manufactured Titanium Aluminide Alloys via In Situ Alloying and Parameter Variation Metals titanium aluminide additive manufacturing in situ alloying selective laser melting Ti4822 |
| title | Tailoring the Microstructure of Laser-Additive-Manufactured Titanium Aluminide Alloys via In Situ Alloying and Parameter Variation |
| title_full | Tailoring the Microstructure of Laser-Additive-Manufactured Titanium Aluminide Alloys via In Situ Alloying and Parameter Variation |
| title_fullStr | Tailoring the Microstructure of Laser-Additive-Manufactured Titanium Aluminide Alloys via In Situ Alloying and Parameter Variation |
| title_full_unstemmed | Tailoring the Microstructure of Laser-Additive-Manufactured Titanium Aluminide Alloys via In Situ Alloying and Parameter Variation |
| title_short | Tailoring the Microstructure of Laser-Additive-Manufactured Titanium Aluminide Alloys via In Situ Alloying and Parameter Variation |
| title_sort | tailoring the microstructure of laser additive manufactured titanium aluminide alloys via in situ alloying and parameter variation |
| topic | titanium aluminide additive manufacturing in situ alloying selective laser melting Ti4822 |
| url | https://www.mdpi.com/2075-4701/13/8/1429 |
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