Optimizing laser parameters and exploring building direction dependence of corrosion behavior in NiTi alloys fabricated by laser powder bed fusion
The microstructure and materials performance of Laser Powder Bed Fusion-fabricated (LPBFed) NiTi shape memory alloys (SMAs) varies depending on the laser parameters and building directions. This study initially optimized the laser processing parameters (laser power and scanning speed) for LPBFed NiT...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-11-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424023755 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850120054545317888 |
|---|---|
| author | Xiaolong Zhang Tong Chang Hongyi Chen Shupeng Wang Yanan Yang Shihui Zhou Chaozong Liu Zhihui Zhang |
| author_facet | Xiaolong Zhang Tong Chang Hongyi Chen Shupeng Wang Yanan Yang Shihui Zhou Chaozong Liu Zhihui Zhang |
| author_sort | Xiaolong Zhang |
| collection | DOAJ |
| description | The microstructure and materials performance of Laser Powder Bed Fusion-fabricated (LPBFed) NiTi shape memory alloys (SMAs) varies depending on the laser parameters and building directions. This study initially optimized the laser processing parameters (laser power and scanning speed) for LPBFed NiTi SMAs to enhance their printing quality and mechanical properties. We determined that with fixed hatch spacing of 80 μm and layer thickness of 30 μm, the laser power of 105 W, and scanning speed of 600 mm/s produced the best results. Subsequently, the corrosion behavior of LPBFed NiTi SMAs built in three different building directions (0°, 45°, 90°) was investigated in 0.9 wt% NaCl solution at 37 °C. The electrochemical data revealed that the corrosion current density (Icorr) decreased with increasing building direction angle (Icorr-90° < Icorr-45° < Icorr-0°). The corrosion resistance followed the order of 0° sample < 45° sample < 90° sample. These findings were attributed to the difference in the grain size and boundary density. Higher boundary densities enhanced the electron activity capacity and the element diffusion rates, facilitating the rapid formation of a protective film and thus improving the corrosion resistance. This new insight into the anisotropy of corrosion behavior relative to building directions can inform the design of NiTi-SMA products and improve their reliability in tissue engineering applications. |
| format | Article |
| id | doaj-art-b0805849a09a4c30ac08005960b3374e |
| 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-b0805849a09a4c30ac08005960b3374e2025-08-20T02:35:29ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01334023403210.1016/j.jmrt.2024.10.105Optimizing laser parameters and exploring building direction dependence of corrosion behavior in NiTi alloys fabricated by laser powder bed fusionXiaolong Zhang0Tong Chang1Hongyi Chen2Shupeng Wang3Yanan Yang4Shihui Zhou5Chaozong Liu6Zhihui Zhang7Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China; Department of Mechanical Engineering, University College London, WC1E 7JE, UKKey Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, ChinaDepartment of Mechanical Engineering, University College London, WC1E 7JE, UKKey Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China; Corresponding author.Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, ChinaKey Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, ChinaInstitute of Orthopaedics and Musculoskeletal Science, University College London Royal National Orthopaedic Hospital, London HA7 4LP, UK; Corresponding author.Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China; Corresponding author.The microstructure and materials performance of Laser Powder Bed Fusion-fabricated (LPBFed) NiTi shape memory alloys (SMAs) varies depending on the laser parameters and building directions. This study initially optimized the laser processing parameters (laser power and scanning speed) for LPBFed NiTi SMAs to enhance their printing quality and mechanical properties. We determined that with fixed hatch spacing of 80 μm and layer thickness of 30 μm, the laser power of 105 W, and scanning speed of 600 mm/s produced the best results. Subsequently, the corrosion behavior of LPBFed NiTi SMAs built in three different building directions (0°, 45°, 90°) was investigated in 0.9 wt% NaCl solution at 37 °C. The electrochemical data revealed that the corrosion current density (Icorr) decreased with increasing building direction angle (Icorr-90° < Icorr-45° < Icorr-0°). The corrosion resistance followed the order of 0° sample < 45° sample < 90° sample. These findings were attributed to the difference in the grain size and boundary density. Higher boundary densities enhanced the electron activity capacity and the element diffusion rates, facilitating the rapid formation of a protective film and thus improving the corrosion resistance. This new insight into the anisotropy of corrosion behavior relative to building directions can inform the design of NiTi-SMA products and improve their reliability in tissue engineering applications.http://www.sciencedirect.com/science/article/pii/S2238785424023755Building directionsNiTi SMAsCorrosion behaviorGrain sizeBoundary densityTissue engineering |
| spellingShingle | Xiaolong Zhang Tong Chang Hongyi Chen Shupeng Wang Yanan Yang Shihui Zhou Chaozong Liu Zhihui Zhang Optimizing laser parameters and exploring building direction dependence of corrosion behavior in NiTi alloys fabricated by laser powder bed fusion Journal of Materials Research and Technology Building directions NiTi SMAs Corrosion behavior Grain size Boundary density Tissue engineering |
| title | Optimizing laser parameters and exploring building direction dependence of corrosion behavior in NiTi alloys fabricated by laser powder bed fusion |
| title_full | Optimizing laser parameters and exploring building direction dependence of corrosion behavior in NiTi alloys fabricated by laser powder bed fusion |
| title_fullStr | Optimizing laser parameters and exploring building direction dependence of corrosion behavior in NiTi alloys fabricated by laser powder bed fusion |
| title_full_unstemmed | Optimizing laser parameters and exploring building direction dependence of corrosion behavior in NiTi alloys fabricated by laser powder bed fusion |
| title_short | Optimizing laser parameters and exploring building direction dependence of corrosion behavior in NiTi alloys fabricated by laser powder bed fusion |
| title_sort | optimizing laser parameters and exploring building direction dependence of corrosion behavior in niti alloys fabricated by laser powder bed fusion |
| topic | Building directions NiTi SMAs Corrosion behavior Grain size Boundary density Tissue engineering |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424023755 |
| work_keys_str_mv | AT xiaolongzhang optimizinglaserparametersandexploringbuildingdirectiondependenceofcorrosionbehaviorinnitialloysfabricatedbylaserpowderbedfusion AT tongchang optimizinglaserparametersandexploringbuildingdirectiondependenceofcorrosionbehaviorinnitialloysfabricatedbylaserpowderbedfusion AT hongyichen optimizinglaserparametersandexploringbuildingdirectiondependenceofcorrosionbehaviorinnitialloysfabricatedbylaserpowderbedfusion AT shupengwang optimizinglaserparametersandexploringbuildingdirectiondependenceofcorrosionbehaviorinnitialloysfabricatedbylaserpowderbedfusion AT yananyang optimizinglaserparametersandexploringbuildingdirectiondependenceofcorrosionbehaviorinnitialloysfabricatedbylaserpowderbedfusion AT shihuizhou optimizinglaserparametersandexploringbuildingdirectiondependenceofcorrosionbehaviorinnitialloysfabricatedbylaserpowderbedfusion AT chaozongliu optimizinglaserparametersandexploringbuildingdirectiondependenceofcorrosionbehaviorinnitialloysfabricatedbylaserpowderbedfusion AT zhihuizhang optimizinglaserparametersandexploringbuildingdirectiondependenceofcorrosionbehaviorinnitialloysfabricatedbylaserpowderbedfusion |