Ming-Zhen Wei
,
Zhen-Hua Cao
,
Xiang-Kang Meng
金属学报(英文版)
doi:10.1007/s40195-016-0377-2
In this work, we have investigated the mechanical properties of Cu/Ta, Ag/Cu and Ag/Nb multilayers with different heterogeneous interfaces. The results suggest that when individual layer thickness (h) is larger than 5-10 nm, the hardness/strength of three different multilayer systems has the similar length scale effect with decreasing layer thickness, while when h ≤ 5 nm, the three multilayer systems show remarkably different plastic deformation behaviors. The strength curves exhibit the variation trends of unchanging, softening and increasing corresponding to Cu/Ta, Ag/Cu and Ag/Nb multilayers, respectively. The microstructure analysis shows that three kinds of multilayers have totally different interfacial structures, which lead to the different strengthening or softening mechanisms.
关键词:
Metallic
,
multilayers
,
Plastic
,
deformation
,
Interfacial
,
structures
,
Strengthening
,
mechanism
