Cu/NbMoTaW納米疊層材料具有尺寸效應(yīng)的力學性能及變形機制(英文)
發(fā)布時間:2022-01-05 07:37
高熵合金(HEA)由于其在惡劣環(huán)境中優(yōu)異的力學性能引起了研究者的廣泛關(guān)注.我們將高熵合金NbMoTaW引入到納米疊層材料中,制備出等層厚的Cu/HEA納米多層膜,綜合研究了其具有尺寸效應(yīng)的力學性能及變形行為.實驗表明, Cu/HEA納米多層膜的硬度隨著層厚h的減小而增加,隨后在h≤50 nm的區(qū)域到達一個平臺,而應(yīng)變速率敏感性出現(xiàn)了一個最大值,這是由于Cu和HEA兩相對應(yīng)變速率敏感性的影響從協(xié)同轉(zhuǎn)變?yōu)楦偁?在層厚較大時,非共格界面導致Cu/HEA多層膜在變形后出現(xiàn)了剪切帶,并且軟相Cu層主導變形.
【文章來源】:Science China Materials. 2020,63(03)EISCICSCD
【文章頁數(shù)】:9 頁
【文章目錄】:
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
本文編號:3570028
【文章來源】:Science China Materials. 2020,63(03)EISCICSCD
【文章頁數(shù)】:9 頁
【文章目錄】:
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
本文編號:3570028
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