Effect of misorientation of grain boundaries on the discontinuous precipitates of Cu–Ni–Si alloy
In this study, the effects of differences in grain size, grain boundary type and misorientation on the initiation of discontinuous precipitates are investigated for the Cu–5Ni–1.25Si alloy. Samples with different grain sizes are obtained by thermomechanical treatment, and the smaller the grain size,...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423018689 |
| _version_ | 1797646731287986176 |
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| author | Xianfeng Liao Linhan Li Kalubi Ren Yanlin Jia Yong Pang Zhu Xiao Yanbin Jiang Zhou Li |
| author_facet | Xianfeng Liao Linhan Li Kalubi Ren Yanlin Jia Yong Pang Zhu Xiao Yanbin Jiang Zhou Li |
| author_sort | Xianfeng Liao |
| collection | DOAJ |
| description | In this study, the effects of differences in grain size, grain boundary type and misorientation on the initiation of discontinuous precipitates are investigated for the Cu–5Ni–1.25Si alloy. Samples with different grain sizes are obtained by thermomechanical treatment, and the smaller the grain size, the higher the percentage of discontinuous precipitate at the same aging time, while there is no significant difference in the growth rate of the reaction front of discontinuous precipitates. EBSD is used to study the effect of grain boundary misorientation on discontinuous precipitates, the characteristics of discontinuous precipitates initiation on different grain boundaries are investigated by multivariate statistical analysis. It is found that discontinuous precipitates only initiate from random grain boundaries instead of coincident site lattice boundaries, where random grain boundaries with misorientation angles of 30–50° are more prone to discontinuous precipitates. And the initiation of DPs at different misorientation axes is different. There is a clear borderline for the axes such as <102>, <103>, and <203>. The grain boundaries below this borderline do not initiate DP, while all grain boundaries below this angle initiate DPs. The cases for axes such as <112>, <114>, and <214> are more complicated. On these misorientation axes, grain boundaries with lower or higher misorientation angles do not initiate DPs, while grain boundaries at intermediate range misorientation angles do initiate DPs. |
| first_indexed | 2024-03-11T15:05:55Z |
| format | Article |
| id | doaj.art-97e62a279dab45b48181f22d0c8c809d |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:05:55Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-97e62a279dab45b48181f22d0c8c809d2023-10-30T06:03:16ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012620602069Effect of misorientation of grain boundaries on the discontinuous precipitates of Cu–Ni–Si alloyXianfeng Liao0Linhan Li1Kalubi Ren2Yanlin Jia3Yong Pang4Zhu Xiao5Yanbin Jiang6Zhou Li7School of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaCorresponding author.; School of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaIn this study, the effects of differences in grain size, grain boundary type and misorientation on the initiation of discontinuous precipitates are investigated for the Cu–5Ni–1.25Si alloy. Samples with different grain sizes are obtained by thermomechanical treatment, and the smaller the grain size, the higher the percentage of discontinuous precipitate at the same aging time, while there is no significant difference in the growth rate of the reaction front of discontinuous precipitates. EBSD is used to study the effect of grain boundary misorientation on discontinuous precipitates, the characteristics of discontinuous precipitates initiation on different grain boundaries are investigated by multivariate statistical analysis. It is found that discontinuous precipitates only initiate from random grain boundaries instead of coincident site lattice boundaries, where random grain boundaries with misorientation angles of 30–50° are more prone to discontinuous precipitates. And the initiation of DPs at different misorientation axes is different. There is a clear borderline for the axes such as <102>, <103>, and <203>. The grain boundaries below this borderline do not initiate DP, while all grain boundaries below this angle initiate DPs. The cases for axes such as <112>, <114>, and <214> are more complicated. On these misorientation axes, grain boundaries with lower or higher misorientation angles do not initiate DPs, while grain boundaries at intermediate range misorientation angles do initiate DPs.http://www.sciencedirect.com/science/article/pii/S2238785423018689Cu–Ni–Si alloyDiscontinuous precipitationGrain boundaryMisorientationElectron backscatter diffraction (EBSD) |
| spellingShingle | Xianfeng Liao Linhan Li Kalubi Ren Yanlin Jia Yong Pang Zhu Xiao Yanbin Jiang Zhou Li Effect of misorientation of grain boundaries on the discontinuous precipitates of Cu–Ni–Si alloy Journal of Materials Research and Technology Cu–Ni–Si alloy Discontinuous precipitation Grain boundary Misorientation Electron backscatter diffraction (EBSD) |
| title | Effect of misorientation of grain boundaries on the discontinuous precipitates of Cu–Ni–Si alloy |
| title_full | Effect of misorientation of grain boundaries on the discontinuous precipitates of Cu–Ni–Si alloy |
| title_fullStr | Effect of misorientation of grain boundaries on the discontinuous precipitates of Cu–Ni–Si alloy |
| title_full_unstemmed | Effect of misorientation of grain boundaries on the discontinuous precipitates of Cu–Ni–Si alloy |
| title_short | Effect of misorientation of grain boundaries on the discontinuous precipitates of Cu–Ni–Si alloy |
| title_sort | effect of misorientation of grain boundaries on the discontinuous precipitates of cu ni si alloy |
| topic | Cu–Ni–Si alloy Discontinuous precipitation Grain boundary Misorientation Electron backscatter diffraction (EBSD) |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423018689 |
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