Solidification Behavior and Cooling Curves for Hypereutectic Fe-21 At. Pct B Alloy

Junfeng Xu, Zengyun Jian, Bo Dang, Di Zhang, Feng Liu

科研成果: 期刊稿件文章同行评审

5 引用 (Scopus)

摘要

The cooling curves for Fe-21 at. pct B hypereutectic alloy were measured, which are correlated with the solidification behaviors. At small undercoolings, the cooling curve has two recalescences, corresponding to L → Fe2B and L → Fe2B + Fe, respectively. At moderate undercoolings, also two recalescences can be observed from the cooling curve, corresponding to L → Fe3B and L + Fe3B → Fe2B + Fe. At large undercoolings, the cooling curve has only one recalescence, corresponding to L → Fe3B + Fe. From TEM analysis, the matrix phase is α-Fe in cases of solidification at small and moderate undercoolings, but is Fe3B in case of large undercooling. HRTEM analysis shows that α-Fe stores deformation energy by irregular atom region, but intermetallic phase (Fe2B or Fe3B) stores deformation energy by increasing grain boundaries and stacking faults, which can explain why α-Fe has good deformation ability and small hardness, but the Fe2B or Fe3B phase on the contrary.

源语言英语
页(从-至)1817-1826
页数10
期刊Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
48
4
DOI
出版状态已出版 - 1 4月 2017

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