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Title: Layer thickness dependent strain rate sensitivity of Cu/amorphous CuNb multilayer

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4980850· OSTI ID:1466208
 [1];  [2];  [1];  [3];  [3];  [4]; ORCiD logo [3]
  1. Texas A & M Univ., College Station, TX (United States). Department of Mechanical Engineering
  2. Shanghai Jiao Tong University, Shanghai (China). State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering
  3. Purdue Univ., West Lafayette, IN (United States). School of Materials Engineering
  4. 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
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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Cited By (5)

Unusual plastic deformation behavior of nanotwinned Cu/high entropy alloy FeCoCrNi nanolaminates journal January 2019
“Ductile” Fracture of Metallic Glass Nanolaminates journal August 2017
Advanced Nanoindentation Testing for Studying Strain-Rate Sensitivity and Activation Volume journal August 2017
An in situ study on Kr ion–irradiated crystalline Cu/amorphous-CuNb nanolaminates journal March 2019
Strategies to tailor serrated flows in metallic glasses journal January 2019

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