Microstructure and mechanical properties of Ni_3Al intermetallics prepared by directional solidification electromagnetic cold crucible technique

The present work focused on the Ni_3Al-based alloy with a high melting point. The aim of the research is to study the effect of withdrawal rate on the microstructures and mechanical properties of directionally solidified Ni-25 Al alloy. Ni_3 Al intermetallics were prepared at different withdrawal ra...

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Bibliographic Details
Published in:中国铸造：英文版 2017, Vol.14 (3), p.169-175
Main Author: Hong-sheng Ding Guo-tian Wang Rui-run Chen Jing-jie Guo Heng-zhi
Format: Article
Language:English
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Summary:The present work focused on the Ni_3Al-based alloy with a high melting point. The aim of the research is to study the effect of withdrawal rate on the microstructures and mechanical properties of directionally solidified Ni-25 Al alloy. Ni_3 Al intermetallics were prepared at different withdrawal rates by directional solidification（DS） in an electromagnetic cold crucible directional solidification furnace. The DS samples contain Ni_3 Al and Ni Al phases. The primary dendritic spacing（λ） decreases with the increasing of withdrawal rate（V）, and the volume fraction of Ni Al phase increases as the withdrawal rate increases. Results of tensile tests show that ductility of DS samples is enhanced with a decrease in the withdrawal rate.
ISSN:1672-6421
2365-9459