Grain refinement and abnormal peritectic solidification in WxNbTiZr high-entropy alloys
The microstructures of many high-entropy alloys (HEAs) can be understood or controlled based on traditional phase formation mechanisms. In this study, peritectic solidification was introduced to HEAs by designing novel WxNbTiZr peritectic high-entropy alloys (PHEAs). The phase constitutions and soli...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522010036 |
| _version_ | 1797980811040915456 |
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| author | Z.D. Shen Z.L. Ma Z.Q. Xu X.W. Cheng |
| author_facet | Z.D. Shen Z.L. Ma Z.Q. Xu X.W. Cheng |
| author_sort | Z.D. Shen |
| collection | DOAJ |
| description | The microstructures of many high-entropy alloys (HEAs) can be understood or controlled based on traditional phase formation mechanisms. In this study, peritectic solidification was introduced to HEAs by designing novel WxNbTiZr peritectic high-entropy alloys (PHEAs). The phase constitutions and solidification microstructure evolutions of WxNbTiZr were clarified by combining experiments and thermodynamic simulations. Grain refinements were achieved in WxNbTiZr, which should attribute to the high growth restriction factors introduced by W solute and the segmentations of the primary phase during peritectic transformation. The significantly refined grains can simultaneously enhance the strength and ductility of the alloy. High fractions of peritectic phases and special pearl chain structures that are highly likely the products of peritectic solidification are seen in WxNbTiZr but not in the typical binary W-Zr peritectic alloy, highlighting that the compositional complexity featured by PHEAs could heavily influence peritectic reaction. The PHEAs idea is also generalized by developing WxMoTiZr alloys. |
| first_indexed | 2024-04-11T05:59:38Z |
| format | Article |
| id | doaj.art-560642ced8fd4912acb407d5d109f0cc |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-11T05:59:38Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-560642ced8fd4912acb407d5d109f0cc2022-12-22T04:41:43ZengElsevierMaterials & Design0264-12752022-12-01224111381Grain refinement and abnormal peritectic solidification in WxNbTiZr high-entropy alloysZ.D. Shen0Z.L. Ma1Z.Q. Xu2X.W. Cheng3School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; Tangshan Research Institute, Beijing Institute of Technology, Tangshan 063000, China; National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing 100081, China; Corresponding author at: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; Department of Frontier & Innovation Research, Wuhan Second Ship Design & Research Institute, No.19 Yangqiao Lake Avenue, Jiangxia District, Wuhan 430205, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; Tangshan Research Institute, Beijing Institute of Technology, Tangshan 063000, China; National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing 100081, China; Corresponding author at: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.The microstructures of many high-entropy alloys (HEAs) can be understood or controlled based on traditional phase formation mechanisms. In this study, peritectic solidification was introduced to HEAs by designing novel WxNbTiZr peritectic high-entropy alloys (PHEAs). The phase constitutions and solidification microstructure evolutions of WxNbTiZr were clarified by combining experiments and thermodynamic simulations. Grain refinements were achieved in WxNbTiZr, which should attribute to the high growth restriction factors introduced by W solute and the segmentations of the primary phase during peritectic transformation. The significantly refined grains can simultaneously enhance the strength and ductility of the alloy. High fractions of peritectic phases and special pearl chain structures that are highly likely the products of peritectic solidification are seen in WxNbTiZr but not in the typical binary W-Zr peritectic alloy, highlighting that the compositional complexity featured by PHEAs could heavily influence peritectic reaction. The PHEAs idea is also generalized by developing WxMoTiZr alloys.http://www.sciencedirect.com/science/article/pii/S0264127522010036High-entropy alloyPeritecticMicrostructure evolutionGrain refinement |
| spellingShingle | Z.D. Shen Z.L. Ma Z.Q. Xu X.W. Cheng Grain refinement and abnormal peritectic solidification in WxNbTiZr high-entropy alloys Materials & Design High-entropy alloy Peritectic Microstructure evolution Grain refinement |
| title | Grain refinement and abnormal peritectic solidification in WxNbTiZr high-entropy alloys |
| title_full | Grain refinement and abnormal peritectic solidification in WxNbTiZr high-entropy alloys |
| title_fullStr | Grain refinement and abnormal peritectic solidification in WxNbTiZr high-entropy alloys |
| title_full_unstemmed | Grain refinement and abnormal peritectic solidification in WxNbTiZr high-entropy alloys |
| title_short | Grain refinement and abnormal peritectic solidification in WxNbTiZr high-entropy alloys |
| title_sort | grain refinement and abnormal peritectic solidification in wxnbtizr high entropy alloys |
| topic | High-entropy alloy Peritectic Microstructure evolution Grain refinement |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522010036 |
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