Rapid growth of FeAl intermetallic compound under high undercooling conditions

Yongjun Lü; Bingbo Wei

doi:10.1360/03ww0095

Rapid growth of FeAl intermetallic compound under high undercooling conditions

Yongjun Lü, Bingbo Wei

School of Physical Science and Technology

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Fe-58at%Al alloy is undercooled up to 222 K (0.15T_L) with the drop tube technique. It is found that there exists a critical undercooling about 185 K, beyond which a "dendrite-equiaxed" growth morphology transition occurs in FeAl intermetallic compound. This transition is characterized by sharp decrease of its grain size. Once the undercooling exceeds 215 K, the peritectic transformation is suppressed completely and a fibrous structure is formed, which results from the cooperative growth of FeAl and FeAl₂ compounds.

Original language	English
Pages (from-to)	547-551
Number of pages	5
Journal	Chinese Science Bulletin
Volume	49
Issue number	6
DOIs	https://doi.org/10.1360/03ww0095
State	Published - 2004

Keywords

Dendrite growth
Grain refining
Peritectic
Rapid solidification
Undercooling

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abstract = "Fe-58at%Al alloy is undercooled up to 222 K (0.15TL) with the drop tube technique. It is found that there exists a critical undercooling about 185 K, beyond which a {"}dendrite-equiaxed{"} growth morphology transition occurs in FeAl intermetallic compound. This transition is characterized by sharp decrease of its grain size. Once the undercooling exceeds 215 K, the peritectic transformation is suppressed completely and a fibrous structure is formed, which results from the cooperative growth of FeAl and FeAl2 compounds.",

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AU - Lü, Yongjun

AU - Wei, Bingbo

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N2 - Fe-58at%Al alloy is undercooled up to 222 K (0.15TL) with the drop tube technique. It is found that there exists a critical undercooling about 185 K, beyond which a "dendrite-equiaxed" growth morphology transition occurs in FeAl intermetallic compound. This transition is characterized by sharp decrease of its grain size. Once the undercooling exceeds 215 K, the peritectic transformation is suppressed completely and a fibrous structure is formed, which results from the cooperative growth of FeAl and FeAl2 compounds.

AB - Fe-58at%Al alloy is undercooled up to 222 K (0.15TL) with the drop tube technique. It is found that there exists a critical undercooling about 185 K, beyond which a "dendrite-equiaxed" growth morphology transition occurs in FeAl intermetallic compound. This transition is characterized by sharp decrease of its grain size. Once the undercooling exceeds 215 K, the peritectic transformation is suppressed completely and a fibrous structure is formed, which results from the cooperative growth of FeAl and FeAl2 compounds.

KW - Dendrite growth

KW - Grain refining

KW - Peritectic

KW - Rapid solidification

KW - Undercooling

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DO - 10.1360/03ww0095

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JF - Chinese Science Bulletin

IS - 6

ER -

Rapid growth of FeAl intermetallic compound under high undercooling conditions

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Keywords

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