Rapid Solidification of Invar Alloy
The Invar alloy has excellent properties, such as a low coefficient of thermal expansion, but there are few reports about the rapid solidification of this alloy. In this study, Invar alloy solidification at different undercooling (Δ<i>T</i>) was investigated via glass melt-flux technique...
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MDPI AG
2023-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/17/1/231 |
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| author | Hanxin He Zhirui Yao Xuyang Li Junfeng Xu |
| author_facet | Hanxin He Zhirui Yao Xuyang Li Junfeng Xu |
| author_sort | Hanxin He |
| collection | DOAJ |
| description | The Invar alloy has excellent properties, such as a low coefficient of thermal expansion, but there are few reports about the rapid solidification of this alloy. In this study, Invar alloy solidification at different undercooling (Δ<i>T</i>) was investigated via glass melt-flux techniques. The sample with the highest undercooling of Δ<i>T</i> = 231 K (recalescence height 140 K) was obtained. The thermal history curve, microstructure, hardness, grain number, and sample density of the alloy were analyzed. The results show that with the increase in solidification undercooling, the XRD peak of the sample shifted to the left, indicating that the lattice constant increased and the solid solubility increased. As the solidification of undercooling increases, the microstructure changes from large dendrites to small columnar grains and then to fine equiaxed grains. At the same time, the number of grains also increases with the increase in the undercooling. The hardness of the sample increases with increasing undercooling. If Δ<i>T</i> ≥ 181 K (128 K), the grain number and the hardness do not increase with undercooling. |
| first_indexed | 2024-03-08T15:02:30Z |
| format | Article |
| id | doaj.art-809861334c2745dbb895f2f888c3ccd6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-08T15:02:30Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-809861334c2745dbb895f2f888c3ccd62024-01-10T15:03:03ZengMDPI AGMaterials1996-19442023-12-0117123110.3390/ma17010231Rapid Solidification of Invar AlloyHanxin He0Zhirui Yao1Xuyang Li2Junfeng Xu3School of Civil Engineering, Xi’an University of Architecture and Technology, No. 13 Yanta Road, Xi’an 710055, ChinaSchool of Materials and Chemical Engineering, Xi’an Technological University, Xi’an 710021, ChinaXi’an Institute of Optics and Precision Mechanics, Xi’an 710119, ChinaSchool of Materials and Chemical Engineering, Xi’an Technological University, Xi’an 710021, ChinaThe Invar alloy has excellent properties, such as a low coefficient of thermal expansion, but there are few reports about the rapid solidification of this alloy. In this study, Invar alloy solidification at different undercooling (Δ<i>T</i>) was investigated via glass melt-flux techniques. The sample with the highest undercooling of Δ<i>T</i> = 231 K (recalescence height 140 K) was obtained. The thermal history curve, microstructure, hardness, grain number, and sample density of the alloy were analyzed. The results show that with the increase in solidification undercooling, the XRD peak of the sample shifted to the left, indicating that the lattice constant increased and the solid solubility increased. As the solidification of undercooling increases, the microstructure changes from large dendrites to small columnar grains and then to fine equiaxed grains. At the same time, the number of grains also increases with the increase in the undercooling. The hardness of the sample increases with increasing undercooling. If Δ<i>T</i> ≥ 181 K (128 K), the grain number and the hardness do not increase with undercooling.https://www.mdpi.com/1996-1944/17/1/231Invar alloysolidificationundercoolinghardness |
| spellingShingle | Hanxin He Zhirui Yao Xuyang Li Junfeng Xu Rapid Solidification of Invar Alloy Materials Invar alloy solidification undercooling hardness |
| title | Rapid Solidification of Invar Alloy |
| title_full | Rapid Solidification of Invar Alloy |
| title_fullStr | Rapid Solidification of Invar Alloy |
| title_full_unstemmed | Rapid Solidification of Invar Alloy |
| title_short | Rapid Solidification of Invar Alloy |
| title_sort | rapid solidification of invar alloy |
| topic | Invar alloy solidification undercooling hardness |
| url | https://www.mdpi.com/1996-1944/17/1/231 |
| work_keys_str_mv | AT hanxinhe rapidsolidificationofinvaralloy AT zhiruiyao rapidsolidificationofinvaralloy AT xuyangli rapidsolidificationofinvaralloy AT junfengxu rapidsolidificationofinvaralloy |