| Forming mechanism of refined granular crystalline of Cu70Ni30 alloy by undercooled solidification |
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| 引用本文： | GUO Xuefeng,LIU Feng,YANG Gencang,XING Jiandong. Forming mechanism of refined granular crystalline of Cu70Ni30 alloy by undercooled solidification[J]. 自然科学进展(英文版), 2000, 10(12): 937-945 |
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| 作者姓名： | GUO Xuefeng LIU Feng YANG Gencang XING Jiandong |
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| 作者单位： | 1.Stale Key laboratory of Solidification Processing, Northwestern Polytechnical University. Xi'an 710072, China;2.College of Materials Science and K.ngineering, Xi'an University of Technology, Xi'an 710048, China;,Stale Key laboratory of Solidification Processing, Northwestern Polytechnical University. Xi'an 710072, China;,Stale Key laboratory of Solidification Processing, Northwestern Polytechnical University. Xi'an 710072, China;,School of Mechanical Kngineering, Xi'an Jiaotong University, Xi'an 710049, China |
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| 摘 要： | Moth glass fluxing and cyclic superheating techniques were adopted to effectively uudercool the Cu70Ni30 alloy in vacuum. Within the undercooling range of 21 K to 270 K, the microstructure evolution ol the alloy was investigated. When the inell was undercooled to △T > △T', (210 K) , the grain refinement took place abruptly, liascd on the observation of the solidified microstructure, the rnierocheinieal-analysis and the calculated results with UCT model, it is found that the secondary grain refinement mechanism consists of two stages. The dendrite is, firstly, broken into hag-ments owing to the stress caused by uneven shrinking during rapid solidilication, then the fragments, under the driving force of surface and strain energies, merge through the migration of l>ouinlaries, i. c. recryslallization, thus leading to the formation of secondary granular-crystalline .
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| 关 键 词： | undercooling Cu70Ni30 alloy dendrite breaking recrystallization. |
Forming mechanism of refined granular crystalline of Cu70Ni30 alloy by undercooled solidification |
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| GUO Xuefeng,LIU Feng,YANG Gencang,XING Jiandong. Forming mechanism of refined granular crystalline of Cu70Ni30 alloy by undercooled solidification[J]. Progress in Natural Science, 2000, 10(12): 937-945 |
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| Authors: | GUO Xuefeng LIU Feng YANG Gencang XING Jiandong |
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| Affiliation: | 1.Stale Key laboratory of Solidification Processing, Northwestern Polytechnical University. Xi'an 710072, China;2.College of Materials Science and K.ngineering, Xi'an University of Technology, Xi'an 710048, China;,Stale Key laboratory of Solidification Processing, Northwestern Polytechnical University. Xi'an 710072, China;,Stale Key laboratory of Solidification Processing, Northwestern Polytechnical University. Xi'an 710072, China;,School of Mechanical Kngineering, Xi'an Jiaotong University, Xi'an 710049, China |
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| Abstract: | |
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| Keywords: | undercooling Cu70Ni30 alloy dendrite breaking recrystallization. |
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