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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 284-286Influence of Fe on the Formation of Nucleation in...

Influence of Fe on the Formation of Nucleation in Carbon-Inoculated Mg-3%Al Alloy

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Abstract:

The Mg-3% Al melt was treated by carbon inoculation and Fe addition. The influence of Fe on the formation of nucleation was investigated. That Fe inhibited the grain refinement of the carbon-inoculated Mg-3%Al alloy or not was closely associated with the operating sequence of carbon inoculation and Fe addition. Under the condition of Fe addition firstly and then carbon inoculation, the Al₄C₃ particles and the particles with duplex phase structure of Al₄C₃ coated on Al-C-Fe or Al-Fe could be observed. Both kinds of particles should act as nucleating substrates for a-Mg grains, resulting in no obvious effect of Fe on refining efficiency of carbon inoculation. Under the contrary condition, the potency of Al₄C₃ nucleating substrates was poisoned by transforming Al₄C₃ into Al-C-Fe-rich intermetallic particles, resulting in grain-coarsening.

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Periodical:

Advanced Materials Research (Volumes 284-286)

Pages:

1588-1593

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.284-286.1588

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Online since:

July 2011

Authors:

Jun Du, Ming Hua Wang, Ting Fan, Wen Fang Li

Keywords:

Carbon Inoculation, Grain Refinement, Iron, Mg-Al Alloy, Nucleating Substrate

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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