Boron Effect on Solidification in the Two phase(NiAl+Ni_3Al)Alloy

Jong-Hoon Leee; Je-Hyun Lee; Hak-Min Kim

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Boron Effect on Solidification in the Two phase(NiAl+Ni_3Al)Alloy

机译：硼对两相（NiAl + Ni_3Al）合金凝固的影响

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摘要

It was found that addition of boron improved room temperature fracture stremgth by formation of Ni_3Al(γ)thin layer around the NiAl(β)phase after heat-treatment in the NiAl+Ni_3Al two phase alloy.Directional solidification technique with quenching of the solidifying interface has been applied to understand the mechanism of formation of the γlayer around the βphase.The quenched solid/liquid interface showed that solidification ended uq with γphase at the βinterdendritic region in the boron added alloy, while the γ phase formed at the interdendritic region in the binary alloy. It is thought that the γphase foumed around the βdendritic phase grows between γ and β phases by a diffusion couple manner in the boron added alloy.It was also interesting to find that boron addition changed the phase field and solidification behavior.

机译：研究发现，在NiAl + Ni_3Al两相合金中进行热处理后，通过在NiAl（β）相周围形成Ni_3Al（γ）薄层，硼的添加改善了室温断裂强度。淬火凝固界面的定向凝固技术淬火的固/液界面表明，凝固在硼添加合金的β枝晶间区域以γ相结束，而γ相形成在β相周围的γ相形成。二元合金。可以认为，在硼添加合金中，散布在β树枝状相周围的γ相通过扩散偶合方式在γ相和β相之间生长，发现添加硼改变了相场和凝固行为也很有趣。

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《High Temperature Materials and Processes》 |1999年第3期|p.145-151|共7页
作者
Jong-Hoon Leee; Je-Hyun Lee; Hak-Min Kim;
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中图分类金属学与热处理;
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Boron Effect on Solidification in the Two phase(NiAl+Ni_3Al)Alloy

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