Fatigue performance of beta titanium alloy topological porous structures fabricated by laser powder bed fusion
The performance of porous β-titanium alloys is crucial for their diverse applications, with fatigue characteristics playing a pivotal role in shaping the design of these porous structures. While topological configurations have exhibited exceptional property, a systematic understanding of their fatig...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424004836 |
| _version_ | 1797247784264400896 |
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| author | Z.Y. Wu Y.J. Liu X. Wu X.C. Liu J.C. Wang Q. Wang |
| author_facet | Z.Y. Wu Y.J. Liu X. Wu X.C. Liu J.C. Wang Q. Wang |
| author_sort | Z.Y. Wu |
| collection | DOAJ |
| description | The performance of porous β-titanium alloys is crucial for their diverse applications, with fatigue characteristics playing a pivotal role in shaping the design of these porous structures. While topological configurations have exhibited exceptional property, a systematic understanding of their fatigue performance is lacking in recent literature. This study reveals that at a porosity level of ∼75%, designed topologically optimized (TO) structures surpass rhombic dodecahedron (RD) structures in compressive yield strength by ∼4 times (149 ± 3 MPa vs. 38 ± 1 MPa). Furthermore, post-heat treatment further enhances the yield strength of TO structures by ∼15%, reaching 172 ± 3 MPa due to grain refinement and β phase stabilization. Moreover, the as-printed TO structure exhibits exceptional compressive fatigue endurance, enduring stress approximately ∼5 times higher than the as-printed RD structure at a cycle count of 106. Microstructure analysis after fatigue testing reveals a reduction in the α'' martensitic phase and an increase in stress-induced ω phase in the heat-treated TO structure, contributing to a slight improvement in fatigue strength compared to the as-printed TO structure. The exceptional fatigue performance observed in LPBF-built beta-type titanium alloy within TO structures highlights the complex relationship between porous structure design, microstructure, compressive strength, and fatigue performance. |
| first_indexed | 2024-03-07T16:53:43Z |
| format | Article |
| id | doaj.art-1492b50369e942d1a929d75bba486066 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:04:12Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-1492b50369e942d1a929d75bba4860662024-03-24T06:58:38ZengElsevierJournal of Materials Research and Technology2238-78542024-03-012947724780Fatigue performance of beta titanium alloy topological porous structures fabricated by laser powder bed fusionZ.Y. Wu0Y.J. Liu1X. Wu2X.C. Liu3J.C. Wang4Q. Wang5Institute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, TianXin District, Changsha, 410011, ChinaInstitute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, TianXin District, Changsha, 410011, China; Corresponding author.Institute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, TianXin District, Changsha, 410011, ChinaInstitute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, TianXin District, Changsha, 410011, ChinaSchool of Engineering, M050, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA 6009, Australia; Department of Mechanical Engineering, The University of Melbourne, Parkville, VIC, 3010, Australia; Corresponding author. School of Engineering, M050, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA 6009, Australia.Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, 110001, China; Corresponding author.The performance of porous β-titanium alloys is crucial for their diverse applications, with fatigue characteristics playing a pivotal role in shaping the design of these porous structures. While topological configurations have exhibited exceptional property, a systematic understanding of their fatigue performance is lacking in recent literature. This study reveals that at a porosity level of ∼75%, designed topologically optimized (TO) structures surpass rhombic dodecahedron (RD) structures in compressive yield strength by ∼4 times (149 ± 3 MPa vs. 38 ± 1 MPa). Furthermore, post-heat treatment further enhances the yield strength of TO structures by ∼15%, reaching 172 ± 3 MPa due to grain refinement and β phase stabilization. Moreover, the as-printed TO structure exhibits exceptional compressive fatigue endurance, enduring stress approximately ∼5 times higher than the as-printed RD structure at a cycle count of 106. Microstructure analysis after fatigue testing reveals a reduction in the α'' martensitic phase and an increase in stress-induced ω phase in the heat-treated TO structure, contributing to a slight improvement in fatigue strength compared to the as-printed TO structure. The exceptional fatigue performance observed in LPBF-built beta-type titanium alloy within TO structures highlights the complex relationship between porous structure design, microstructure, compressive strength, and fatigue performance.http://www.sciencedirect.com/science/article/pii/S2238785424004836Selective laser meltingBeta titanium alloyLaser powder bed fusionFatigueTopological porous structuresPhase transformation |
| spellingShingle | Z.Y. Wu Y.J. Liu X. Wu X.C. Liu J.C. Wang Q. Wang Fatigue performance of beta titanium alloy topological porous structures fabricated by laser powder bed fusion Journal of Materials Research and Technology Selective laser melting Beta titanium alloy Laser powder bed fusion Fatigue Topological porous structures Phase transformation |
| title | Fatigue performance of beta titanium alloy topological porous structures fabricated by laser powder bed fusion |
| title_full | Fatigue performance of beta titanium alloy topological porous structures fabricated by laser powder bed fusion |
| title_fullStr | Fatigue performance of beta titanium alloy topological porous structures fabricated by laser powder bed fusion |
| title_full_unstemmed | Fatigue performance of beta titanium alloy topological porous structures fabricated by laser powder bed fusion |
| title_short | Fatigue performance of beta titanium alloy topological porous structures fabricated by laser powder bed fusion |
| title_sort | fatigue performance of beta titanium alloy topological porous structures fabricated by laser powder bed fusion |
| topic | Selective laser melting Beta titanium alloy Laser powder bed fusion Fatigue Topological porous structures Phase transformation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424004836 |
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