Microstructure evolution and mechanical properties of selective laser melted bulk-form titanium matrix nanocomposites with minor B4C additions
Crack-free and almost fully dense (≥99%) bulk-form titanium matrix nanocomposites in-situ synthesized from a ball-milled mixture of Ti-6Al-4V and B4C powders were achieved through an optimized selective laser melting (SLM) process. The effects of minor B4C addition on microstructure evolution, hardn...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-01-01
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| Series: | Materials & Design |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127519306835 |
| _version_ | 1818266754868051968 |
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| author | Hailiang Li Zhihua Yang Delong Cai Dechang Jia Yu Zhou |
| author_facet | Hailiang Li Zhihua Yang Delong Cai Dechang Jia Yu Zhou |
| author_sort | Hailiang Li |
| collection | DOAJ |
| description | Crack-free and almost fully dense (≥99%) bulk-form titanium matrix nanocomposites in-situ synthesized from a ball-milled mixture of Ti-6Al-4V and B4C powders were achieved through an optimized selective laser melting (SLM) process. The effects of minor B4C addition on microstructure evolution, hardness, compressive properties and fracture mechanisms of the composites were systematically investigated. The in-situ synthesized nanoscale TiBw or TiCp ceramic reinforcements, exhibiting a quasi-continuous (TMC1) or full-continuous structure (TMC2), could play a prominent role in determining the microstructure refinement and mechanical properties of the composites. Results indicate that the SLM-processed nanocomposites exhibit a maximum increase of 45% of Vickers microhardness and 26% of ultimate compressive strength over the Ti-64 alloy. The enhancement of mechanical properties is mainly attributed to the second-phase strengthening, grain refinement strengthening as well as solid solution strengthening induced by the interstitial carbon in Ti matrix. This study provides a novel solution for microstructure tailoring with minor B4C addition and producing high-performance titanium matrix composites via SLM additive manufacturing. Keywords: Titanium matrix nanocomposites, Selective laser melting, Ceramic reinforcements, Microstructure, Mechanical properties |
| first_indexed | 2024-12-12T20:11:44Z |
| format | Article |
| id | doaj.art-4396b9478c7947888c4d1fcd23eb4a98 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-12T20:11:44Z |
| publishDate | 2020-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-4396b9478c7947888c4d1fcd23eb4a982022-12-22T00:13:30ZengElsevierMaterials & Design0264-12752020-01-01185Microstructure evolution and mechanical properties of selective laser melted bulk-form titanium matrix nanocomposites with minor B4C additionsHailiang Li0Zhihua Yang1Delong Cai2Dechang Jia3Yu Zhou4Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin, 150001, China; Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150080, ChinaKey Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin, 150001, China; Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150080, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China; Corresponding author. Building C3, No. 2 Yikuang Street, Nangang District, Harbin, 150080, China.Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin, 150001, China; Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150080, ChinaKey Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin, 150001, China; Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150080, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China; Corresponding author. Key Laboratory of Advanced Structural-Functional Integration Materials & GreenManufacturing Technology, Harbin Institute of Technology, Harbin, 150001, ChinaKey Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin, 150001, China; Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150080, ChinaCrack-free and almost fully dense (≥99%) bulk-form titanium matrix nanocomposites in-situ synthesized from a ball-milled mixture of Ti-6Al-4V and B4C powders were achieved through an optimized selective laser melting (SLM) process. The effects of minor B4C addition on microstructure evolution, hardness, compressive properties and fracture mechanisms of the composites were systematically investigated. The in-situ synthesized nanoscale TiBw or TiCp ceramic reinforcements, exhibiting a quasi-continuous (TMC1) or full-continuous structure (TMC2), could play a prominent role in determining the microstructure refinement and mechanical properties of the composites. Results indicate that the SLM-processed nanocomposites exhibit a maximum increase of 45% of Vickers microhardness and 26% of ultimate compressive strength over the Ti-64 alloy. The enhancement of mechanical properties is mainly attributed to the second-phase strengthening, grain refinement strengthening as well as solid solution strengthening induced by the interstitial carbon in Ti matrix. This study provides a novel solution for microstructure tailoring with minor B4C addition and producing high-performance titanium matrix composites via SLM additive manufacturing. Keywords: Titanium matrix nanocomposites, Selective laser melting, Ceramic reinforcements, Microstructure, Mechanical propertieshttp://www.sciencedirect.com/science/article/pii/S0264127519306835 |
| spellingShingle | Hailiang Li Zhihua Yang Delong Cai Dechang Jia Yu Zhou Microstructure evolution and mechanical properties of selective laser melted bulk-form titanium matrix nanocomposites with minor B4C additions Materials & Design |
| title | Microstructure evolution and mechanical properties of selective laser melted bulk-form titanium matrix nanocomposites with minor B4C additions |
| title_full | Microstructure evolution and mechanical properties of selective laser melted bulk-form titanium matrix nanocomposites with minor B4C additions |
| title_fullStr | Microstructure evolution and mechanical properties of selective laser melted bulk-form titanium matrix nanocomposites with minor B4C additions |
| title_full_unstemmed | Microstructure evolution and mechanical properties of selective laser melted bulk-form titanium matrix nanocomposites with minor B4C additions |
| title_short | Microstructure evolution and mechanical properties of selective laser melted bulk-form titanium matrix nanocomposites with minor B4C additions |
| title_sort | microstructure evolution and mechanical properties of selective laser melted bulk form titanium matrix nanocomposites with minor b4c additions |
| url | http://www.sciencedirect.com/science/article/pii/S0264127519306835 |
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