Suppression of shear banding in high-strength Cu/Mo nanocomposites with hierarchical bicontinuous intertwined structures

Journal Article · 04 March 2018 · Materials Research Letters

DOI: https://doi.org/10.1080/21663831.2018.1431315 · OSTI ID:1479968

Cui, Yuchi ^[1]; Derby, Benjamin ^[1]; Li, Nan  ^[2]; Mara, Nathan ^[2]; Misra, Amit ^[1]

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1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The microstructures and mechanical behavior of high-temperature co-sputtered Cu/Mo nanocomposites were investigated and compared with Cu/Mo multilayers. The co-sputtered nanocomposites present hierarchical architectures with bicontinuous intertwined Cu/Mo phases, the feature size of which can be tuned from 35 to 3 nm by changing the deposition parameters. After indentation, shear bands were found in the multilayers but not in the hierarchical nanocomposites. In situ nanocompression tests in Transmission electron microscopy showed that the hierarchical nanocomposite containing fine-length-scale intertwined Cu/Mo phases has very high strength. Finally, the hierarchical structure is proposed to play an important role in suppressing shear band formation.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1479968
• Report Number(s): LA-UR--18-29384
• Journal Information: Materials Research Letters, Journal Name: Materials Research Letters Journal Issue: 3 Vol. 6; ISSN 2166-3831
• Publisher: Taylor and FrancisCopyright Statement
• Country of Publication: United States
• Language: English