Layer Thickness-Dependent Hardness and Strain Rate Sensitivity of Cu–Al/Al Nanostructured Multilayers
作者： Ya-Qiang Wang , Zhao-Qi Hou , Jin-Yu Zhang , Xiao-Qing Liang , Gang Liu
DOI: 10.1007/S40195-016-0372-7
关键词: Deformation (engineering) 、 Layer thickness 、 Strengthening mechanisms of materials 、 Strain rate 、 Composite material 、 Materials science 、 Metal 、 Nanoindentation 、 Metallurgy 、 Thin film 、 Layer (electronics) 、 Industrial and Manufacturing Engineering 、 Metals and Alloys
摘要: Cu–Al/Al nanostructured metallic multilayers with Al layer thickness hAl varying from 5 to 100 nm were prepared, and their mechanical properties deformation behaviors studied by nanoindentation testing. The results showed that the hardness increased drastically decreasing down about 20 nm, whereafter reached a plateau approaches of alloyed Cu–Al monolithic thin films. strain rate sensitivity (SRS, m), however, decreased monotonically reducing hAl. thickness-dependent strengthening mechanisms discussed, it was revealed nanolayers dominated at ≤ while crystalline > nm. plastic mainly related ductile nanolayers, which responsible for monotonic evolution SRS In addition, hAl-dependent quantitatively modeled in light different length scales.
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