Abstract
The effect of Si and prolonged time on interfaces and cavitation erosion behavior of directionally solidified (DS) Fe-B alloy in flowing liquid zinc was investigated. The results show Si enriches in α-Fe intragranular and α/Fe2B boundaries to refine textured grains. DS Fe-B alloy with 2.5 wt%Si exhibits the best cavitation erosion resistance to flowing zinc, which is attributed to formation of alternating distributed Γ-Fe3Zn10 and FeSi and subsequently columnar ζ-FeZn13. Cavitation erosion resistance mechanism of DS Fe-B alloy with 2.5 wt%Si is manifested that Si-induced Γ-Fe3Zn10 and FeSi and the rooting-whisker ζ-FeZn13 layer can inhibit spallation and cracks of Fe2B and products.
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