Layer thickness dependent strain rate sensitivity of Cu/amorphous CuNb multilayer
- Texas A & M Univ., College Station, TX (United States). Department of Mechanical Engineering
- Shanghai Jiao Tong University, Shanghai (China). State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering
- Purdue Univ., West Lafayette, IN (United States). School of Materials Engineering
- Purdue Univ., West Lafayette, IN (United States). School of Materials Engineering and School of Electrical and Computer Engineering
We report strain rate sensitivity of crystalline materials is closely related to dislocation activity. In the absence of dislocations, amorphous alloys are usually considered to be strain rate insensitive. However, the strain rate sensitivity of crystalline/amorphous composites is rarely studied, especially at nanoscale. In this study, we show that the strain rate sensitivity of Cu/amorphous CuNb multilayers is layer thickness dependent. At small layer thickness (below 50 nm), the multilayers demonstrate limited strain rate sensitivity; at relatively large layer thickness (above 100 nm), the strain rate sensitivity of multilayers is close to that of the single layer Cu film. Finally, mechanisms that lead to size dependent variation of strain rate sensitivity in these multilayers are discussed.
- Research Organization:
- Purdue Univ., West Lafayette, IN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0016337
- OSTI ID:
- 1466208
- Alternate ID(s):
- OSTI ID: 1361825
- Journal Information:
- Applied Physics Letters, Vol. 110, Issue 16; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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