Phase Field Study on the Spinodal Decomposition of β Phase in Zr–Nb-Ti Alloys
In this study, a phase field method based on the Cahn–Hilliard equation was used to simulate the spinodal decomposition in Zr-Nb-Ti alloys, and the effects of Ti concentration and aging temperature (800–925 K) on the spinodal structure of the alloys for 1000 min were investigated. It was found that...
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2023-04-01
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| author | Kun Yang Yanghe Wang Jingjing Tang Zixuan Wang Dechuang Zhang Yilong Dai Jianguo Lin |
| author_facet | Kun Yang Yanghe Wang Jingjing Tang Zixuan Wang Dechuang Zhang Yilong Dai Jianguo Lin |
| author_sort | Kun Yang |
| collection | DOAJ |
| description | In this study, a phase field method based on the Cahn–Hilliard equation was used to simulate the spinodal decomposition in Zr-Nb-Ti alloys, and the effects of Ti concentration and aging temperature (800–925 K) on the spinodal structure of the alloys for 1000 min were investigated. It was found that the spinodal decomposition occurred in the Zr-40Nb-20Ti, Zr-40Nb-25Ti and Zr-33Nb-29Ti alloys aged at 900 K with the formation of the Ti-rich phases and Ti-poor phases. The spinodal phases in the Zr-40Nb-20Ti, Zr-40Nb-25Ti and Zr-33Nb-29Ti alloys aged at 900 K were in an interconnected non-oriented maze-like shape, a discrete droplet-like shape and a clustering sheet-like shape in the early aging period, respectively. With the increase in Ti concentration of the Zr-Nb-Ti alloys, the wavelength of the concentration modulation increased but amplitude decreased. The aging temperature had an important influence on the spinodal decomposition of the Zr-Nb-Ti alloy system. For the Zr-40Nb-25Ti alloy, with the increase in the aging temperature, the shape of the rich Zr phase changed from an interconnected non-oriented maze-like shape to a discrete droplet-like shape, and the wavelength of the concentration modulate increased quickly to a stable value, but the amplitude decreased in the alloy. As the aging temperature increased to 925 K, the spinodal decomposition did not occur in the Zr-40Nb-25Ti alloy. |
| first_indexed | 2024-03-11T04:49:19Z |
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| id | doaj.art-ad885158d9a94b2eae63112f9204848b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T04:49:19Z |
| publishDate | 2023-04-01 |
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| series | Materials |
| spelling | doaj.art-ad885158d9a94b2eae63112f9204848b2023-11-17T20:11:10ZengMDPI AGMaterials1996-19442023-04-01168296910.3390/ma16082969Phase Field Study on the Spinodal Decomposition of β Phase in Zr–Nb-Ti AlloysKun Yang0Yanghe Wang1Jingjing Tang2Zixuan Wang3Dechuang Zhang4Yilong Dai5Jianguo Lin6School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, ChinaSchool of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, ChinaSchool of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, ChinaSchool of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, ChinaKey Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University, Xiangtan 411105, ChinaSchool of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, ChinaKey Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University, Xiangtan 411105, ChinaIn this study, a phase field method based on the Cahn–Hilliard equation was used to simulate the spinodal decomposition in Zr-Nb-Ti alloys, and the effects of Ti concentration and aging temperature (800–925 K) on the spinodal structure of the alloys for 1000 min were investigated. It was found that the spinodal decomposition occurred in the Zr-40Nb-20Ti, Zr-40Nb-25Ti and Zr-33Nb-29Ti alloys aged at 900 K with the formation of the Ti-rich phases and Ti-poor phases. The spinodal phases in the Zr-40Nb-20Ti, Zr-40Nb-25Ti and Zr-33Nb-29Ti alloys aged at 900 K were in an interconnected non-oriented maze-like shape, a discrete droplet-like shape and a clustering sheet-like shape in the early aging period, respectively. With the increase in Ti concentration of the Zr-Nb-Ti alloys, the wavelength of the concentration modulation increased but amplitude decreased. The aging temperature had an important influence on the spinodal decomposition of the Zr-Nb-Ti alloy system. For the Zr-40Nb-25Ti alloy, with the increase in the aging temperature, the shape of the rich Zr phase changed from an interconnected non-oriented maze-like shape to a discrete droplet-like shape, and the wavelength of the concentration modulate increased quickly to a stable value, but the amplitude decreased in the alloy. As the aging temperature increased to 925 K, the spinodal decomposition did not occur in the Zr-40Nb-25Ti alloy.https://www.mdpi.com/1996-1944/16/8/2969Zr-Nb-Ti alloyspinodal decompositionmicrostructure evolutionphase field method |
| spellingShingle | Kun Yang Yanghe Wang Jingjing Tang Zixuan Wang Dechuang Zhang Yilong Dai Jianguo Lin Phase Field Study on the Spinodal Decomposition of β Phase in Zr–Nb-Ti Alloys Materials Zr-Nb-Ti alloy spinodal decomposition microstructure evolution phase field method |
| title | Phase Field Study on the Spinodal Decomposition of β Phase in Zr–Nb-Ti Alloys |
| title_full | Phase Field Study on the Spinodal Decomposition of β Phase in Zr–Nb-Ti Alloys |
| title_fullStr | Phase Field Study on the Spinodal Decomposition of β Phase in Zr–Nb-Ti Alloys |
| title_full_unstemmed | Phase Field Study on the Spinodal Decomposition of β Phase in Zr–Nb-Ti Alloys |
| title_short | Phase Field Study on the Spinodal Decomposition of β Phase in Zr–Nb-Ti Alloys |
| title_sort | phase field study on the spinodal decomposition of β phase in zr nb ti alloys |
| topic | Zr-Nb-Ti alloy spinodal decomposition microstructure evolution phase field method |
| url | https://www.mdpi.com/1996-1944/16/8/2969 |
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