INTRAGRANULAR FERRITE FORMED IN ASSOCIATION WITH INCLUSIONS IN A VANADIUM MICROALLOYED STEEL

作     者：K.M.Wu M.Enomoto 

作者机构：DepartmentofAppliedPhysicsTheHubeiProvinceKeyLaboratoryofRefractionsandCeramies-Ministry-ProvinceJointly-ConstructedCultivationBaseforStateKeyLaboratoryWuhanUniversityofScienceandTechnologyWuhan430081China DepartmentofMaterialsScienceandEngineeringIbarakiUniversityNakananusawaHitachi316-8511Japan 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2004年第17卷第6期

页      面：785-789页

核心收录：

学科分类：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：the Nationual Natural Science Foundation of China(No.50471107) 

主　　题：steels intragranular ferrite nucleation three-dimensional reconstruction 

摘      要：Intragranular ferrite was formed at inclusions in a vanadium microalloyed steel with excess amount of sulfur. The chemical composition of inclusions in the steel was analyzed by SEM-EDS. The inclusions were mainly composed of MnS and aluminum oxides. The precipitation of MnS at aluminum oxides might result in Mn depletion, which, in turn, pro- motes the formation of intragranular ferrite. Optical and SEM observations and three- dimensional (3D) reconstruction demonstrated that intragranular ferrite was formed at inclusions. The morphology of intragranular ferrite changed with undercooling. At higher temperatures intragranular ferrite was nearly equiaxed whereas it was plate-like or lath-like at lower temperatures.