Optimizing the comprehensive properties of PBF-LB/M Ti6Al4V alloy in nitric acid by heat treatment
Abstract Titanium (Ti) alloys fabricated by laser powder bed fusion (PBF-LB/M) exhibit substantial potential for industrial applications due to their good formability and cost-effectiveness. However, the poor matching between strength, plasticity, and corrosion resistance properties in as-fabricated...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-05-01
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| Series: | npj Materials Degradation |
| Online Access: | https://doi.org/10.1038/s41529-025-00587-6 |
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| author | Z. Liu L. M. Zhang A. L. Ma D. C. Ren H. B. Ji Y. G. Zheng |
| author_facet | Z. Liu L. M. Zhang A. L. Ma D. C. Ren H. B. Ji Y. G. Zheng |
| author_sort | Z. Liu |
| collection | DOAJ |
| description | Abstract Titanium (Ti) alloys fabricated by laser powder bed fusion (PBF-LB/M) exhibit substantial potential for industrial applications due to their good formability and cost-effectiveness. However, the poor matching between strength, plasticity, and corrosion resistance properties in as-fabricated PBF-LB/M Ti-alloys hinders their broader application. Herein, the effect of heat treatment on the comprehensive properties of PBF-LB/M Ti6Al4V alloy was investigated. Results revealed that hot isostatic pressing (HIP) and annealing treatment (AT) facilitate the transformation of acicular αʹ-Ti phase to α + β phase, leading to a shift in the fracture mechanism from brittle to ductile behaviour, thereby improving the strength-plasticity balance. Moreover, HIP effectively reduced internal defects and promoted the formation of a denser, more robust passive film in nitric acid, compared to PBF-LB/M alloy after AT. This enhanced passive film imparts superior corrosion resistance, thus achieving a favourable compromise between strength, plasticity, and corrosion resistance in PBF-LB/M Ti6Al4V alloy. |
| format | Article |
| id | doaj-art-0b0bc5d4f9704b5ea4df3fb7383bd161 |
| institution | Kabale University |
| issn | 2397-2106 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Materials Degradation |
| spelling | doaj-art-0b0bc5d4f9704b5ea4df3fb7383bd1612025-08-20T03:52:20ZengNature Portfolionpj Materials Degradation2397-21062025-05-019111010.1038/s41529-025-00587-6Optimizing the comprehensive properties of PBF-LB/M Ti6Al4V alloy in nitric acid by heat treatmentZ. Liu0L. M. Zhang1A. L. Ma2D. C. Ren3H. B. Ji4Y. G. Zheng5CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of SciencesCAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of SciencesCAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of SciencesShi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of ScienceShi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of ScienceCAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of SciencesAbstract Titanium (Ti) alloys fabricated by laser powder bed fusion (PBF-LB/M) exhibit substantial potential for industrial applications due to their good formability and cost-effectiveness. However, the poor matching between strength, plasticity, and corrosion resistance properties in as-fabricated PBF-LB/M Ti-alloys hinders their broader application. Herein, the effect of heat treatment on the comprehensive properties of PBF-LB/M Ti6Al4V alloy was investigated. Results revealed that hot isostatic pressing (HIP) and annealing treatment (AT) facilitate the transformation of acicular αʹ-Ti phase to α + β phase, leading to a shift in the fracture mechanism from brittle to ductile behaviour, thereby improving the strength-plasticity balance. Moreover, HIP effectively reduced internal defects and promoted the formation of a denser, more robust passive film in nitric acid, compared to PBF-LB/M alloy after AT. This enhanced passive film imparts superior corrosion resistance, thus achieving a favourable compromise between strength, plasticity, and corrosion resistance in PBF-LB/M Ti6Al4V alloy.https://doi.org/10.1038/s41529-025-00587-6 |
| spellingShingle | Z. Liu L. M. Zhang A. L. Ma D. C. Ren H. B. Ji Y. G. Zheng Optimizing the comprehensive properties of PBF-LB/M Ti6Al4V alloy in nitric acid by heat treatment npj Materials Degradation |
| title | Optimizing the comprehensive properties of PBF-LB/M Ti6Al4V alloy in nitric acid by heat treatment |
| title_full | Optimizing the comprehensive properties of PBF-LB/M Ti6Al4V alloy in nitric acid by heat treatment |
| title_fullStr | Optimizing the comprehensive properties of PBF-LB/M Ti6Al4V alloy in nitric acid by heat treatment |
| title_full_unstemmed | Optimizing the comprehensive properties of PBF-LB/M Ti6Al4V alloy in nitric acid by heat treatment |
| title_short | Optimizing the comprehensive properties of PBF-LB/M Ti6Al4V alloy in nitric acid by heat treatment |
| title_sort | optimizing the comprehensive properties of pbf lb m ti6al4v alloy in nitric acid by heat treatment |
| url | https://doi.org/10.1038/s41529-025-00587-6 |
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