Cu/NbMoTaW纳米叠层材料具有尺寸效应的力学性能及变形机制（英文）
发布时间：2022-01-05 07:37
高熵合金（HEA）由于其在恶劣环境中优异的力学性能引起了研究者的广泛关注.我们将高熵合金NbMoTaW引入到纳米叠层材料中,制备出等层厚的Cu/HEA纳米多层膜,综合研究了其具有尺寸效应的力学性能及变形行为.实验表明, Cu/HEA纳米多层膜的硬度随着层厚h的减小而增加,随后在h≤50 nm的区域到达一个平台,而应变速率敏感性出现了一个最大值,这是由于Cu和HEA两相对应变速率敏感性的影响从协同转变为竞争.在层厚较大时,非共格界面导致Cu/HEA多层膜在变形后出现了剪切带,并且软相Cu层主导变形.
【文章来源】：Science China Materials. 2020,63(03)EISCICSCD
【文章页数】：9 页
【文章目录】：
INTRODUCTION
EXPERIMENTAL SECTION
Materials preparation
Microstructure characterization
Nanoindentation tests
RESULTS
Initial microstructure of the as-deposited Cu/HEA C/CNLs
Deformed microstructure of the indented Cu/HEA C/CNLs
Mechanical properties of the Cu/HEA NLs
DISCUSSION
Interface-dominated deformation morphologies
Size-dependent hardness and strengthening mechanisms
Size-dependent strain rate sensitivity of Cu/HEA NLs
CONCLUSION
本文编号：3570028
【文章来源】：Science China Materials. 2020,63(03)EISCICSCD
【文章页数】：9 页
【文章目录】：
INTRODUCTION
EXPERIMENTAL SECTION
Materials preparation
Microstructure characterization
Nanoindentation tests
RESULTS
Initial microstructure of the as-deposited Cu/HEA C/CNLs
Deformed microstructure of the indented Cu/HEA C/CNLs
Mechanical properties of the Cu/HEA NLs
DISCUSSION
Interface-dominated deformation morphologies
Size-dependent hardness and strengthening mechanisms
Size-dependent strain rate sensitivity of Cu/HEA NLs
CONCLUSION
本文编号：3570028
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