Enhancement of shear stability of a Fe-based amorphous alloy using electrodeposited Ni layers

作     者：Y.C.Wang X.M.Luo L.J.Chen H.W.Yang B.Zhang G.P.Zhang 

作者机构：School of Materials Science and EngineeringShenyang University of Technology Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of Sciences Key Laboratory for Anisotropy and Texture of MaterialsMinistry of EducationSchool of Materials Science and EngineeringNortheastern University 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2018年第34卷第12期

页      面：2283-2289页

核心收录：

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

基　　金：supported by the National Natural Science Foundation of China(NSFC,Grant Nos.51571199 and 51671050) supported by NSFC(Grant No.51601198) 

主　　题：Sandwich-structured composites Amorphous alloy Shear stability Plasticity Fracture 

摘      要：Tensile and fracture behaviors of sandwich-structured composites consisting of a Fe-based amorphous layer with a constant thickness and ultrafine-grained Ni layers with different thicknesses were investigated. The results indicate that the initiation and the stable propagation of the shear band in the amorphous layer was dominated by the Ni layers due to their strong constraint role. The catastrophic fracture of the amorphous layer was postponed in the sandwich composites through properly increasing the constrained Ni layer thickness, which effectively decreased the shear stress on the shear fracture planes of the amorphous layer, and thus led to stable propagation of the primary SB characterized by the increase in the smooth region size of the shear band.