Microstructural Morphology Changes of the Lead-Tin Eutectic Alloy by Different Undercooling Levels
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- Kang Heesam
- Division of Materials Science and Engineering, Korea University
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- Yoon Wooyoung
- Division of Materials Science and Engineering, Korea University
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Experimental work is described in undercoolings and microstructures of Pb-Sn eutectic alloy droplets emulsified in oil bath. By controlling experimental variables, the final droplet size produced was in the range of 10 to 300 μm, and measured undercoolings ranged up to about 70 K. Microstructures of the droplets depend strongly on the degree of undercooling before solidification. By increasing undercooling, three major microstructure transitions, which include the morphological changes of eutectic phase from lamellar to anomalous in lower undercooling level and of primary α-Pb phase from dendrite to equiaxed grains in higher undercooling levels, are observed. The phase change from eutectic to primary α-Pb dendrite plus eutectic is also observed. The physical mechanism of these microstructure transitions is analyzed on the basis of the Lipton-Kurz-Trivedi theory for dendrite growth and the Jackson-Hunt theory for lamellar eutectic growth.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 45 (10), 2956-2959, 2004
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679227652864
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- NII論文ID
- 130004452283
- 10013716963
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- NII書誌ID
- AA1151294X
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- COI
- 1:CAS:528:DC%2BD2cXhtFajt7nM
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 7127425
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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