The 3D morphologies and growth mechanisms of proeutectic FeAl3 at the Al/Fe interface under different cooling rates were studied by synchrotron X-ray tomography.With increasing cooling rate,FeAl3 crystals developed from faceted polygonal prism,plates with flat surface,thin ribbon-like with periodic undu-lating surface to non-faceted rods with radial dendrites in cross section,indicating a gradual interface growth mode transition from two-dimensional layer growth to continuous growth.At a higher cooling rate,twinning mechanism plays a leading role in the formation and growth of FeAl3.A link between the morphologies,twinning and crystallographic structure was established based on quantitative analyses on the 3D structures.

Naifang Zhang;Qiaodan Hu;Zongye Ding;Wenquan Lu;Fan Yang;Jianguo Li

Shanghai Key Laboratory of Materials Laser Processing and Modification,School of Materials Science and Engineering,Shanghai Jiao Tong University,200240 Shanghai,China;School of Mechanical Engineering,Shanghai Jiao Tong University,200240 Shanghai,China

材料科学技术（英文版）

[1]Naifang Zhang;Qiaodan Hu;Zongye Ding;Wenquan Lu;Fan Yang;Jianguo Li-.3D morphological evolution and growth mechanism of proeutectic FeAl3 phases formed at Al/Fe interface under different cooling rates)[J].材料科学技术（英文版）,2022(21):83-93

proeutectic,undu

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