A concept of regulating the distribution of continuous brittle phases by spatial division of the Ti3SiC2/Ti2AlNb brazing seam
Herein, a novel concept was proposed to address the issue that continuous brittle phases degrade the mechanical properties of a brazed joint. In this concept, the continuous brittle phases could become dispersive by inserting a network-like structure to divide the brazing seam spatially. This concep...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522005639 |
| _version_ | 1798037055211569152 |
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| author | Bo Zhang Qing Chang Zhan Sun Degang Li Hui Pan Lixia Zhang |
| author_facet | Bo Zhang Qing Chang Zhan Sun Degang Li Hui Pan Lixia Zhang |
| author_sort | Bo Zhang |
| collection | DOAJ |
| description | Herein, a novel concept was proposed to address the issue that continuous brittle phases degrade the mechanical properties of a brazed joint. In this concept, the continuous brittle phases could become dispersive by inserting a network-like structure to divide the brazing seam spatially. This concept was verified in a specific brazing system, where Ti3SiC2 ceramic and Ti2AlNb alloy were brazed by an AgCu interlayer. Ductile Cu foam with a network-like structure was used to disperse the continuous brittle TiCuSi intermetallic that should have in-situ formed in the Ti3SiC2/AgCu/Ti2AlNb brazed joint. Results show that the effect of Cu foam on dispersing the brittle TiCuSi intermetallic is pronounced. The effects of holding time and pore size on the dispersion effect of Cu foam were investigated. The joint fracture analysis and micro-mechanical properties of phases analysis reveal that the dispersive TiCuSi intermetallic is superior to the continuous one. The reason is that the microstructure of discrete TiCuSi intermetallic surrounded by ductile Ag-based and Cu-based solid solutions has a more robust capacity to accommodate microcracks. Thus the brazed joint is toughened and strengthened. |
| first_indexed | 2024-04-11T21:21:04Z |
| format | Article |
| id | doaj.art-9c57174ba53a48aca8ed6b5ffe36e8c3 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-11T21:21:04Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-9c57174ba53a48aca8ed6b5ffe36e8c32022-12-22T04:02:37ZengElsevierMaterials & Design0264-12752022-09-01221110941A concept of regulating the distribution of continuous brittle phases by spatial division of the Ti3SiC2/Ti2AlNb brazing seamBo Zhang0Qing Chang1Zhan Sun2Degang Li3Hui Pan4Lixia Zhang5State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, ChinaCorresponding author.; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, ChinaHerein, a novel concept was proposed to address the issue that continuous brittle phases degrade the mechanical properties of a brazed joint. In this concept, the continuous brittle phases could become dispersive by inserting a network-like structure to divide the brazing seam spatially. This concept was verified in a specific brazing system, where Ti3SiC2 ceramic and Ti2AlNb alloy were brazed by an AgCu interlayer. Ductile Cu foam with a network-like structure was used to disperse the continuous brittle TiCuSi intermetallic that should have in-situ formed in the Ti3SiC2/AgCu/Ti2AlNb brazed joint. Results show that the effect of Cu foam on dispersing the brittle TiCuSi intermetallic is pronounced. The effects of holding time and pore size on the dispersion effect of Cu foam were investigated. The joint fracture analysis and micro-mechanical properties of phases analysis reveal that the dispersive TiCuSi intermetallic is superior to the continuous one. The reason is that the microstructure of discrete TiCuSi intermetallic surrounded by ductile Ag-based and Cu-based solid solutions has a more robust capacity to accommodate microcracks. Thus the brazed joint is toughened and strengthened.http://www.sciencedirect.com/science/article/pii/S0264127522005639BrazingTi3SiC2 phaseBrittle intermetallicSpatial divisionCu foamFracture |
| spellingShingle | Bo Zhang Qing Chang Zhan Sun Degang Li Hui Pan Lixia Zhang A concept of regulating the distribution of continuous brittle phases by spatial division of the Ti3SiC2/Ti2AlNb brazing seam Materials & Design Brazing Ti3SiC2 phase Brittle intermetallic Spatial division Cu foam Fracture |
| title | A concept of regulating the distribution of continuous brittle phases by spatial division of the Ti3SiC2/Ti2AlNb brazing seam |
| title_full | A concept of regulating the distribution of continuous brittle phases by spatial division of the Ti3SiC2/Ti2AlNb brazing seam |
| title_fullStr | A concept of regulating the distribution of continuous brittle phases by spatial division of the Ti3SiC2/Ti2AlNb brazing seam |
| title_full_unstemmed | A concept of regulating the distribution of continuous brittle phases by spatial division of the Ti3SiC2/Ti2AlNb brazing seam |
| title_short | A concept of regulating the distribution of continuous brittle phases by spatial division of the Ti3SiC2/Ti2AlNb brazing seam |
| title_sort | concept of regulating the distribution of continuous brittle phases by spatial division of the ti3sic2 ti2alnb brazing seam |
| topic | Brazing Ti3SiC2 phase Brittle intermetallic Spatial division Cu foam Fracture |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522005639 |
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