Diffusion bonding of TA2 titanium and 20# steel with vanadium/chromium bimetal interlayers: Microstructure, unexpected carbides, and mechanical properties
V and Cr bimetals are utilized as interlayers in the vacuum diffusion bonding of TA2 Ti and 20# steel to prevent the formation of Ti–Fe intermetallic compounds and improve the interface compatibility. The microstructure and mechanical properties of the diffusion-bonded joints are investigated using...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424021860 |
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| author | Sheng Zeng Guoqiang You Xiao Ling Jinyu Feng Cheng Gu Bin Jiang |
| author_facet | Sheng Zeng Guoqiang You Xiao Ling Jinyu Feng Cheng Gu Bin Jiang |
| author_sort | Sheng Zeng |
| collection | DOAJ |
| description | V and Cr bimetals are utilized as interlayers in the vacuum diffusion bonding of TA2 Ti and 20# steel to prevent the formation of Ti–Fe intermetallic compounds and improve the interface compatibility. The microstructure and mechanical properties of the diffusion-bonded joints are investigated using optical microscopy, scanning electron microscopy combined with energy dispersive spectroscopy, transmission electron microscopy, X-ray diffraction, nanoindentation, and tensile testing. The results indicate that the V/Cr bimetallic interlayer effectively inhibits the formation of Ti–Fe intermetallic compounds, with solid solutions without these compounds present at the Ti/V and steel/Cr interfaces. However, a 1–3-μm-thick continuous, hard, brittle vanadium carbide layer with hardness and elastic modulus value of 6.66 GPa and 201.55 GPa is unexpectedly discovered at the interface between V and Cr. The fracture morphology analysis reveals that the continuous carbide layer at the V/Cr interface is the primary cause of joint failure. The tensile strength of the joint remains relatively stable with an increase in the bonding temperature, whereas the elongation gradually decreases. A maximum tensile strength of 252 MPa is achieved with an elongation of 4.3%. |
| format | Article |
| id | doaj-art-a51401b5839e47729d663308c273cec8 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-a51401b5839e47729d663308c273cec82025-08-20T02:39:09ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01332430244110.1016/j.jmrt.2024.09.182Diffusion bonding of TA2 titanium and 20# steel with vanadium/chromium bimetal interlayers: Microstructure, unexpected carbides, and mechanical propertiesSheng Zeng0Guoqiang You1Xiao Ling2Jinyu Feng3Cheng Gu4Bin Jiang5College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing, 400044, China; National Key Laboratory of High-end Equipment Casting Technology, Chongqing University, Chongqing, 400044, China; Corresponding author. College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China.College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, 400045, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing, 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing, 400044, China; National Key Laboratory of High-end Equipment Casting Technology, Chongqing University, Chongqing, 400044, ChinaV and Cr bimetals are utilized as interlayers in the vacuum diffusion bonding of TA2 Ti and 20# steel to prevent the formation of Ti–Fe intermetallic compounds and improve the interface compatibility. The microstructure and mechanical properties of the diffusion-bonded joints are investigated using optical microscopy, scanning electron microscopy combined with energy dispersive spectroscopy, transmission electron microscopy, X-ray diffraction, nanoindentation, and tensile testing. The results indicate that the V/Cr bimetallic interlayer effectively inhibits the formation of Ti–Fe intermetallic compounds, with solid solutions without these compounds present at the Ti/V and steel/Cr interfaces. However, a 1–3-μm-thick continuous, hard, brittle vanadium carbide layer with hardness and elastic modulus value of 6.66 GPa and 201.55 GPa is unexpectedly discovered at the interface between V and Cr. The fracture morphology analysis reveals that the continuous carbide layer at the V/Cr interface is the primary cause of joint failure. The tensile strength of the joint remains relatively stable with an increase in the bonding temperature, whereas the elongation gradually decreases. A maximum tensile strength of 252 MPa is achieved with an elongation of 4.3%.http://www.sciencedirect.com/science/article/pii/S2238785424021860Ti–steel diffusion bondingBimetallic interlayerMicrostructureCarbide |
| spellingShingle | Sheng Zeng Guoqiang You Xiao Ling Jinyu Feng Cheng Gu Bin Jiang Diffusion bonding of TA2 titanium and 20# steel with vanadium/chromium bimetal interlayers: Microstructure, unexpected carbides, and mechanical properties Journal of Materials Research and Technology Ti–steel diffusion bonding Bimetallic interlayer Microstructure Carbide |
| title | Diffusion bonding of TA2 titanium and 20# steel with vanadium/chromium bimetal interlayers: Microstructure, unexpected carbides, and mechanical properties |
| title_full | Diffusion bonding of TA2 titanium and 20# steel with vanadium/chromium bimetal interlayers: Microstructure, unexpected carbides, and mechanical properties |
| title_fullStr | Diffusion bonding of TA2 titanium and 20# steel with vanadium/chromium bimetal interlayers: Microstructure, unexpected carbides, and mechanical properties |
| title_full_unstemmed | Diffusion bonding of TA2 titanium and 20# steel with vanadium/chromium bimetal interlayers: Microstructure, unexpected carbides, and mechanical properties |
| title_short | Diffusion bonding of TA2 titanium and 20# steel with vanadium/chromium bimetal interlayers: Microstructure, unexpected carbides, and mechanical properties |
| title_sort | diffusion bonding of ta2 titanium and 20 steel with vanadium chromium bimetal interlayers microstructure unexpected carbides and mechanical properties |
| topic | Ti–steel diffusion bonding Bimetallic interlayer Microstructure Carbide |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424021860 |
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