Microstructure and shear property of high-temperature brazing of TiAl alloy and 316L stainless steel with a Ni-based amorphous filler
High-quality joining of TiAl alloy to stainless steel is of great significance to the aerospace field. However, the hybrid structure of TiAl and 316L always suffers from insufficient strength when serving at elevated temperatures. In this work, a high-melting-point quaternary Ni-Nb-Zr-Ti amorphous a...
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Frontiers Media S.A.
2022-11-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2022.1098397/full |
| _version_ | 1811321117639442432 |
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| author | Shun Guo Shun Guo Xiaopeng Li Xiaopeng Li Kewei Dong Kewei Dong Jieren Gu Jieren Gu Qi Zhou Qi Zhou Kehong Wang Kehong Wang |
| author_facet | Shun Guo Shun Guo Xiaopeng Li Xiaopeng Li Kewei Dong Kewei Dong Jieren Gu Jieren Gu Qi Zhou Qi Zhou Kehong Wang Kehong Wang |
| author_sort | Shun Guo |
| collection | DOAJ |
| description | High-quality joining of TiAl alloy to stainless steel is of great significance to the aerospace field. However, the hybrid structure of TiAl and 316L always suffers from insufficient strength when serving at elevated temperatures. In this work, a high-melting-point quaternary Ni-Nb-Zr-Ti amorphous alloy was applied as the filler metal to braze the two alloys at different temperatures. The microstructure and mechanical properties were studied in detail, and the results indicated that the joint was divided into three different regions and various reaction products were formed after brazing. The shear strength of the joint tends to first increase and then decrease with increasing brazing temperature. A satisfactory joint was obtained at 1090°C, and the highest shear strength reached 290 MPa and 180 MPa at room temperature and 750°C, respectively. Shear fracture indicates that there were obvious cleavage steps and some secondary cracks on the fracture surface, indicating that a high-melting-point quaternary Ni-Nb-Zr-Ti amorphous alloy is useful to improve the shear strength of TiAl alloy and 316L stainless steel, but it is difficult to effectively improve the plasticity. The fracture occurred on the TiAl interfacial region, and the phase causing microcrack initiation and propagation was AlNiTi. |
| first_indexed | 2024-04-13T13:11:07Z |
| format | Article |
| id | doaj.art-ce3f740f6fae4ae2b527eb0daa201410 |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-04-13T13:11:07Z |
| publishDate | 2022-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-ce3f740f6fae4ae2b527eb0daa2014102022-12-22T02:45:36ZengFrontiers Media S.A.Frontiers in Materials2296-80162022-11-01910.3389/fmats.2022.10983971098397Microstructure and shear property of high-temperature brazing of TiAl alloy and 316L stainless steel with a Ni-based amorphous fillerShun Guo0Shun Guo1Xiaopeng Li2Xiaopeng Li3Kewei Dong4Kewei Dong5Jieren Gu6Jieren Gu7Qi Zhou8Qi Zhou9Kehong Wang10Kehong Wang11School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, ChinaKey Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Ministry of Industry and Information Technology, Nanjing, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, ChinaKey Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Ministry of Industry and Information Technology, Nanjing, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, ChinaKey Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Ministry of Industry and Information Technology, Nanjing, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, ChinaKey Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Ministry of Industry and Information Technology, Nanjing, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, ChinaKey Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Ministry of Industry and Information Technology, Nanjing, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, ChinaKey Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Ministry of Industry and Information Technology, Nanjing, ChinaHigh-quality joining of TiAl alloy to stainless steel is of great significance to the aerospace field. However, the hybrid structure of TiAl and 316L always suffers from insufficient strength when serving at elevated temperatures. In this work, a high-melting-point quaternary Ni-Nb-Zr-Ti amorphous alloy was applied as the filler metal to braze the two alloys at different temperatures. The microstructure and mechanical properties were studied in detail, and the results indicated that the joint was divided into three different regions and various reaction products were formed after brazing. The shear strength of the joint tends to first increase and then decrease with increasing brazing temperature. A satisfactory joint was obtained at 1090°C, and the highest shear strength reached 290 MPa and 180 MPa at room temperature and 750°C, respectively. Shear fracture indicates that there were obvious cleavage steps and some secondary cracks on the fracture surface, indicating that a high-melting-point quaternary Ni-Nb-Zr-Ti amorphous alloy is useful to improve the shear strength of TiAl alloy and 316L stainless steel, but it is difficult to effectively improve the plasticity. The fracture occurred on the TiAl interfacial region, and the phase causing microcrack initiation and propagation was AlNiTi.https://www.frontiersin.org/articles/10.3389/fmats.2022.1098397/fullTiAl alloy316L stainless steelamorphous fillerhigh-temperature brazingshear strength |
| spellingShingle | Shun Guo Shun Guo Xiaopeng Li Xiaopeng Li Kewei Dong Kewei Dong Jieren Gu Jieren Gu Qi Zhou Qi Zhou Kehong Wang Kehong Wang Microstructure and shear property of high-temperature brazing of TiAl alloy and 316L stainless steel with a Ni-based amorphous filler Frontiers in Materials TiAl alloy 316L stainless steel amorphous filler high-temperature brazing shear strength |
| title | Microstructure and shear property of high-temperature brazing of TiAl alloy and 316L stainless steel with a Ni-based amorphous filler |
| title_full | Microstructure and shear property of high-temperature brazing of TiAl alloy and 316L stainless steel with a Ni-based amorphous filler |
| title_fullStr | Microstructure and shear property of high-temperature brazing of TiAl alloy and 316L stainless steel with a Ni-based amorphous filler |
| title_full_unstemmed | Microstructure and shear property of high-temperature brazing of TiAl alloy and 316L stainless steel with a Ni-based amorphous filler |
| title_short | Microstructure and shear property of high-temperature brazing of TiAl alloy and 316L stainless steel with a Ni-based amorphous filler |
| title_sort | microstructure and shear property of high temperature brazing of tial alloy and 316l stainless steel with a ni based amorphous filler |
| topic | TiAl alloy 316L stainless steel amorphous filler high-temperature brazing shear strength |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2022.1098397/full |
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