Thickness Effect of Nanocrystalline Layer on the Deformation Mechanism of Amorphous/Crystalline Multilayered Structure

作     者：Wen-Jay Lee Yu-Chien Lo Anchen Yang Kuanpeng Chen Nan-Yow Chen 

作者机构：National Center for High-Performance ComputingNo.22Keyuan Rd.Central Taiwan Science ParkTaichung City 40763Taiwan Department of Materials Science and EngineeringNational Chiao Tung UniversityNo.1001 University Rd.Hsinchu 30010Taiwan National Center for High-Performance ComputingNo.7R&D 6th Rd.Hsinchu Science ParkHsinchu City 30076Taiwan 

出 版 物：《Computer Modeling in Engineering & Sciences》 (工程与科学中的计算机建模（英文）)

年 卷 期：2019年第120卷第8期

页      面：293-304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）] 0835[工学-软件工程] 0701[理学-数学] 0811[工学-控制科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：North Carolina Humanities Council, NC Humanities Ministry of Science and Technology, Taiwan, MOST, (107-2221-E-492-011-MY3, MOST 107-2218-E-007-012-) 

主　　题：Molecular dynamics Cu64Zr36 bulk metallic glass Cu64Zr36/Cu layered structure shear band mechanical property deformation 

摘      要：Different thickness of amorphous/nanocrystalline multi-layered structure can be used to modulate the strength and ductility of the composite *** this work,molecular dynamics simulations were conducted to study the thickness effect of nanocrystalline layer on mechanical properties and deformation behavior of the Cu64Zr36/Cu multi-layer *** stress-strain relationship,local stress,local strain,and deformation mechanism are *** results reveal that the change of thickness of the crystalline layer significantly affects the mechanical properties and deformation *** the strain at the elastic region,the amorphous Cu64Zr36 layer dominates the mechanical behavior,leading the fact that Young’s modulus,first yielding stress,and first yielding strain are close to that of Cu64Zr36 *** the strain at the plastic region,the contribution of the crystalline layer on the mechanical behavior becomes more and more significant with increasing the thickness of the crystalline *** the thickness ratio(amorphous/crystalline)of 4,the shear band deformation of amorphous layer dominates the mechanical *** the thickness ratio is 1,the glide dislocation of the crystalline layer dominates the stress-strain behavior.