Comparative study of LPBF Ta–Ti alloy: microstructural evolution and deformation behavior
Tantalum faces limitations in bone implant applications due to stress shielding induced by high elastic modulus, along with processing challenges for Ta-based alloys. In this study, we fabricated in-situ alloyed Ta–Ti samples via laser powder bed fusion technology, systematically investigating the r...
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Elsevier
2025-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425021210 |
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| author | Zhenyu Yang Yuanhong Qiu Jiangqi Zhu Zhifeng Huang Shengbin Dai Weihu Yang Min Liu Gang Wang Xingchen Yan Wenhua Huang |
| author_facet | Zhenyu Yang Yuanhong Qiu Jiangqi Zhu Zhifeng Huang Shengbin Dai Weihu Yang Min Liu Gang Wang Xingchen Yan Wenhua Huang |
| author_sort | Zhenyu Yang |
| collection | DOAJ |
| description | Tantalum faces limitations in bone implant applications due to stress shielding induced by high elastic modulus, along with processing challenges for Ta-based alloys. In this study, we fabricated in-situ alloyed Ta–Ti samples via laser powder bed fusion technology, systematically investigating the role of Ti elements in microstructural modification and mechanical strengthening. The quasi-in-situ electron backscatter diffraction technique was innovatively combined with molecular dynamics simulations to dynamicly track the deformation mechanisms and resolve multiscale interactions. Results demonstrate that Ti addition promotes columnar-to-equiaxed transition through constitutional undercooling, while unmelted Ta particles act as heterogeneous nucleation sites. This dual mechanism refined grain size by 89 % (from 164.5 μm in pure Ta to 18.0 μm). During small deformations, refined grains facilitated uniform strain distribution; however, unmelted particles triggered stress concentration at high strains, reducing fracture elongation to 20 % and inducing mixed ductile-brittle fracture. Optimal parameters (laser power 240 W, scanning speed 660 mm/s) achieved a Vickers hardness of 297.2 HV. This work pioneers the correlation of quasi-in-situ observed strain partitioning with simulated solidification pathways, providing foundational insights for high-strength biomedical Ta alloy design. |
| format | Article |
| id | doaj-art-53554efc331842639ede9d78b37a5cd3 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-53554efc331842639ede9d78b37a5cd32025-08-25T04:14:30ZengElsevierJournal of Materials Research and Technology2238-78542025-09-01383230324210.1016/j.jmrt.2025.08.165Comparative study of LPBF Ta–Ti alloy: microstructural evolution and deformation behaviorZhenyu Yang0Yuanhong Qiu1Jiangqi Zhu2Zhifeng Huang3Shengbin Dai4Weihu Yang5Min Liu6Gang Wang7Xingchen Yan8Wenhua Huang9Institute of New Materials, Guangdong Academy of Sciences, Guangdong-Hong Kong Joint Laboratory of Modern Surface Engineering Technology, Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Guangzhou, Guangdong, 510651, China; School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, ChinaInstitute of New Materials, Guangdong Academy of Sciences, Guangdong-Hong Kong Joint Laboratory of Modern Surface Engineering Technology, Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Guangzhou, Guangdong, 510651, China; School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, ChinaInstitute of New Materials, Guangdong Academy of Sciences, Guangdong-Hong Kong Joint Laboratory of Modern Surface Engineering Technology, Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Guangzhou, Guangdong, 510651, ChinaThe State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, ChinaInstitute of New Materials, Guangdong Academy of Sciences, Guangdong-Hong Kong Joint Laboratory of Modern Surface Engineering Technology, Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Guangzhou, Guangdong, 510651, ChinaKey Laboratory of Biorheological Science and Technology, Ministry of Education College of Bioengineering, Chongqing University, Chongqing, 400044, ChinaInstitute of New Materials, Guangdong Academy of Sciences, Guangdong-Hong Kong Joint Laboratory of Modern Surface Engineering Technology, Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Guangzhou, Guangdong, 510651, ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China; Corresponding author.Institute of New Materials, Guangdong Academy of Sciences, Guangdong-Hong Kong Joint Laboratory of Modern Surface Engineering Technology, Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Guangzhou, Guangdong, 510651, China; Corresponding author.Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, Department of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China; Guangdong Engineering Research Center for Translation of Medical 3D Printing Application, Guangdong Provincial Key Laboratory of Medical Biomechanics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China; Corresponding author. Guangdong Provincial Key Laboratory of Digital Medicine and Biomechanics, Department of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China.Tantalum faces limitations in bone implant applications due to stress shielding induced by high elastic modulus, along with processing challenges for Ta-based alloys. In this study, we fabricated in-situ alloyed Ta–Ti samples via laser powder bed fusion technology, systematically investigating the role of Ti elements in microstructural modification and mechanical strengthening. The quasi-in-situ electron backscatter diffraction technique was innovatively combined with molecular dynamics simulations to dynamicly track the deformation mechanisms and resolve multiscale interactions. Results demonstrate that Ti addition promotes columnar-to-equiaxed transition through constitutional undercooling, while unmelted Ta particles act as heterogeneous nucleation sites. This dual mechanism refined grain size by 89 % (from 164.5 μm in pure Ta to 18.0 μm). During small deformations, refined grains facilitated uniform strain distribution; however, unmelted particles triggered stress concentration at high strains, reducing fracture elongation to 20 % and inducing mixed ductile-brittle fracture. Optimal parameters (laser power 240 W, scanning speed 660 mm/s) achieved a Vickers hardness of 297.2 HV. This work pioneers the correlation of quasi-in-situ observed strain partitioning with simulated solidification pathways, providing foundational insights for high-strength biomedical Ta alloy design.http://www.sciencedirect.com/science/article/pii/S2238785425021210LPBFUnmelted TaQuasi-in-situ EBSDTa–Ti alloyStrengthening mechanism |
| spellingShingle | Zhenyu Yang Yuanhong Qiu Jiangqi Zhu Zhifeng Huang Shengbin Dai Weihu Yang Min Liu Gang Wang Xingchen Yan Wenhua Huang Comparative study of LPBF Ta–Ti alloy: microstructural evolution and deformation behavior Journal of Materials Research and Technology LPBF Unmelted Ta Quasi-in-situ EBSD Ta–Ti alloy Strengthening mechanism |
| title | Comparative study of LPBF Ta–Ti alloy: microstructural evolution and deformation behavior |
| title_full | Comparative study of LPBF Ta–Ti alloy: microstructural evolution and deformation behavior |
| title_fullStr | Comparative study of LPBF Ta–Ti alloy: microstructural evolution and deformation behavior |
| title_full_unstemmed | Comparative study of LPBF Ta–Ti alloy: microstructural evolution and deformation behavior |
| title_short | Comparative study of LPBF Ta–Ti alloy: microstructural evolution and deformation behavior |
| title_sort | comparative study of lpbf ta ti alloy microstructural evolution and deformation behavior |
| topic | LPBF Unmelted Ta Quasi-in-situ EBSD Ta–Ti alloy Strengthening mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425021210 |
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