Microstructure and fracture toughness of the Bridgman directionally solidified Fe-Al-Ta eutectic at different solidification rates  

作　　者：Chunjuan Cui Cong Wang Pei Wang Wei Liu Yuanyuan Lai Li Deng Haijun Su 

机构地区：[1]School of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an,710055,China [2]State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,710072,China [3]Shaanxi Engineering Technology Research Center for Wear-resisting Materials,Xi’an 710055,China

出　　处：《Journal of Materials Science & Technology》2020年第7期63-74,共12页材料科学技术（英文版）

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).

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.

关 键 词：Directional solidification Eutectic composite Solid/liquid interface Fracture toughness Fracture morphology 

分 类 号：TG244.3[金属学及工艺—铸造] TG141[一般工业技术—材料科学与工程]