Microstructure Transition and Grain Refinement Mechanism of Undercooled Alloys

作     者：LI Hongtao Nancy Julius Siambun Bih-Lii Chuab Melvin Gan Jet Hong AN Hongen 李洪涛;Nancy Julius Siambun;Bih-Lii Chuab;Melvin Gan Jet Hong;安红恩

作者机构：College of Mechanical and Electronic EngineeringHuanghe Jiaotong UniversityJiaozuo 454950China Faculty of EngineeringUniversity Malaysia SabahKota Kinabalu 88400Malaysia Henan Engineering Technology Research Center on Intelligent Manufacturing Technology and EquipmentJiaozuo 454950China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2021年第36卷第6期

页      面：922-926页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Funded by the Basic Applied Research Projects in Shanxi Province(No.201801D221151) the Key R&D and Promotion Projects in Henan Province(No.212102210267) 

主　　题：microstructure transition grain refinement undercoolcd alloys Ni-Cu alloys 

摘      要：The solidification microstructures of undercooled Ni90Cu10 alloys under different undercoolings were studied systematically by means of melt coating and cyclic *** the obtained undercooling range,the solidification structures of the two undercooled alloys have similar transformation processes,and there are two kinds of grain refinement structures under the conditions of low undercooling and high undercooling,*** microstructures of the two grain refinement processes were analyzed in more detail by electronic backscattering diffraction *** the condition of small undercooling,dendrite remelting is considered to be the main reason of grain ***,under the condition of high undercooling,the existence of annealing twins and obvious migration of grain boundary are important evidences for the occurrence of recrystallization process.