摘要
Fe-Al-Ta eutectic composites were obtained by a modified Bridgman directional solidification technique at different solidification rates.Solidification microstructure transforms from regular eutectic to eutectic colony with the increase of the solidification rate.The solid/liquid interface of Fe-Al-Ta eutectic evolves from planar interface to cellular interface with the increase of the solidification rate.In addition,threepoint bending method was adopted to study the room-temperature fracture toughness of the as-cast Fe-Al-Ta eutectic alloy and the Fe-Al-Ta eutectic composites.Moreover,the fracture morphologies,the crack propagation path and the strengthening mechanism of Fe-Al-Ta eutectic were discussed.
基金
This work was supported financially by the National Natural Science Foundation of China(No.51201121)
the Science and Technology Foundation for Selected Overseas Chinese Scholars of Shaanxi Province(2015)
the Key Industry Innovation Chain(group)Project of Shaanxi Province(No.2019ZDLGY 04-04)
the Research Project of Shaanxi Engineering Technology Research Center for Wear-resisting Materials(No.2016NMZX03).
