Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Zr-4 Alloy Joint
The development of welding technology for zirconium alloy has great significance on the safety, stability, and reliability of the operation of the nuclear reactor. In this work, vacuum diffusion bonding of Zr-4 alloy was studied at the diffusion temperature ranging from 760 to 820 °C with holding ti...
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MDPI AG
2021
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oai:doaj.org-article:657561e0fd604f46a95f80f66609b81f2021-11-25T17:19:46ZMicrostructure and Mechanical Properties of Vacuum Diffusion Bonded Zr-4 Alloy Joint10.3390/cryst111114372073-4352https://doaj.org/article/657561e0fd604f46a95f80f66609b81f2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1437https://doaj.org/toc/2073-4352The development of welding technology for zirconium alloy has great significance on the safety, stability, and reliability of the operation of the nuclear reactor. In this work, vacuum diffusion bonding of Zr-4 alloy was studied at the diffusion temperature ranging from 760 to 820 °C with holding times of 30–90 min. The effects of diffusion bonding temperature and holding time on the interfacial microstructure and mechanical properties of the diffusion bonded Zr-4 alloy joints were investigated in detail, and the relationship between the interfacial microstructure and shear strength of the diffusion bonded joints was discussed. The results show that the interface bonding ratio of the diffusion bonded Zr-4 joint gradually increased from 74% to 95% with the increasing of bonding temperature. In addition, the grain size of the base material became a larger and brittle second phase composed of Zr(Cr, Fe)<sub>2</sub> and eutectic α-Zr + Zr(Fe, Cr)<sub>2</sub> formed in the joint with the increase of the temperature as well as the extension of the bonding time. The highest shear strength of 349 MPa was obtained at 800 °C for 30 min under 7 MPa, and the crack of the joint was primarily propagated along with the base material rather than the bonded interface.Zeming WangXu YangJing WangZhonglin XiaoFugong QiKongbo SunYing WangZhenwen YangMDPI AGarticleZr-4 alloydiffusion bondingshear strengthinterfacial microstructureCrystallographyQD901-999ENCrystals, Vol 11, Iss 1437, p 1437 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Zr-4 alloy diffusion bonding shear strength interfacial microstructure Crystallography QD901-999 |
| spellingShingle |
Zr-4 alloy diffusion bonding shear strength interfacial microstructure Crystallography QD901-999 Zeming Wang Xu Yang Jing Wang Zhonglin Xiao Fugong Qi Kongbo Sun Ying Wang Zhenwen Yang Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Zr-4 Alloy Joint |
| description |
The development of welding technology for zirconium alloy has great significance on the safety, stability, and reliability of the operation of the nuclear reactor. In this work, vacuum diffusion bonding of Zr-4 alloy was studied at the diffusion temperature ranging from 760 to 820 °C with holding times of 30–90 min. The effects of diffusion bonding temperature and holding time on the interfacial microstructure and mechanical properties of the diffusion bonded Zr-4 alloy joints were investigated in detail, and the relationship between the interfacial microstructure and shear strength of the diffusion bonded joints was discussed. The results show that the interface bonding ratio of the diffusion bonded Zr-4 joint gradually increased from 74% to 95% with the increasing of bonding temperature. In addition, the grain size of the base material became a larger and brittle second phase composed of Zr(Cr, Fe)<sub>2</sub> and eutectic α-Zr + Zr(Fe, Cr)<sub>2</sub> formed in the joint with the increase of the temperature as well as the extension of the bonding time. The highest shear strength of 349 MPa was obtained at 800 °C for 30 min under 7 MPa, and the crack of the joint was primarily propagated along with the base material rather than the bonded interface. |
| format |
article |
| author |
Zeming Wang Xu Yang Jing Wang Zhonglin Xiao Fugong Qi Kongbo Sun Ying Wang Zhenwen Yang |
| author_facet |
Zeming Wang Xu Yang Jing Wang Zhonglin Xiao Fugong Qi Kongbo Sun Ying Wang Zhenwen Yang |
| author_sort |
Zeming Wang |
| title |
Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Zr-4 Alloy Joint |
| title_short |
Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Zr-4 Alloy Joint |
| title_full |
Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Zr-4 Alloy Joint |
| title_fullStr |
Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Zr-4 Alloy Joint |
| title_full_unstemmed |
Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Zr-4 Alloy Joint |
| title_sort |
microstructure and mechanical properties of vacuum diffusion bonded zr-4 alloy joint |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/657561e0fd604f46a95f80f66609b81f |
| work_keys_str_mv |
AT zemingwang microstructureandmechanicalpropertiesofvacuumdiffusionbondedzr4alloyjoint AT xuyang microstructureandmechanicalpropertiesofvacuumdiffusionbondedzr4alloyjoint AT jingwang microstructureandmechanicalpropertiesofvacuumdiffusionbondedzr4alloyjoint AT zhonglinxiao microstructureandmechanicalpropertiesofvacuumdiffusionbondedzr4alloyjoint AT fugongqi microstructureandmechanicalpropertiesofvacuumdiffusionbondedzr4alloyjoint AT kongbosun microstructureandmechanicalpropertiesofvacuumdiffusionbondedzr4alloyjoint AT yingwang microstructureandmechanicalpropertiesofvacuumdiffusionbondedzr4alloyjoint AT zhenwenyang microstructureandmechanicalpropertiesofvacuumdiffusionbondedzr4alloyjoint |
| _version_ |
1718412474613497856 |