http://repository.iitr.ac.in/handle/123456789/12700| Title: | Dual strengthening mechanisms induced by carbon nanotubes in roll bonded aluminum composites |
| Authors: | Lahiri, Debrupa Bakshi S.R. Keshri A.K. Liu Y. Agarwal A. |
| Published in: | Materials Science and Engineering A |
| Abstract: | The dual role of carbon nanotubes (CNTs) in strengthening roll bonded aluminum composites has been elucidated in this study. An increase in the elastic modulus by 59% has been observed at 2 vol.% CNT addition in aluminum, whereas tensile strength increases by 250% with 9.5 vol.% CNT addition. CNTs play a dual role in the strengthening mechanism in Al-CNT composite foil, which can be correlated to the degree of dispersion of CNTs in the matrix. Better CNT dispersion leads to improvement of elastic properties. In contrast, CNT clusters in the aluminum matrix impede dislocation motion, causing strain hardening and thus improvement in the tensile strength. Dislocation density of the composites has been computed as a function of CNT content to show the effect on strain hardening of the metal matrix-CNT composite. © 2009 Elsevier B.V. All rights reserved. |
| Citation: | Materials Science and Engineering A (2009), 523(43832): 263-270 |
| URI: | https://doi.org/10.1016/j.msea.2009.06.006 http://repository.iitr.ac.in/handle/123456789/12700 |
| Issue Date: | 2009 |
| Keywords: | Al-CNT composite foil Dislocation density Dispersion Roll-bonding Strain hardening |
| ISSN: | 9215093 |
| Author Scopus IDs: | 26326345700 24177950800 35205917600 57192561401 7401480913 |
| Author Affiliations: | Lahiri, D., Nanomechanics and Nanotribology Laboratory, Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, United States Bakshi, S.R., Nanomechanics and Nanotribology Laboratory, Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, United States Keshri, A.K., Nanomechanics and Nanotribology Laboratory, Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, United States Liu, Y., Advanced Materials Engineering Research Institute, Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, United States Agarwal, A., Nanomechanics and Nanotribology Laboratory, Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, United States |
| Funding Details: | The authors acknowledge Mr. Neal Ricks’ assistance during rolling and Mr. Geroge Gomes's assistance during tensile testing. A.A. acknowledges funding from the National Science Foundation CAREER Award (NSF-DMI-0547178) and Office of Naval Research-DURIP program (N00014-06-0675). S.R.B. acknowledges Dissertation Year Fellowship from Florida International University. |
| Corresponding Author: | Agarwal, A.; Nanomechanics and Nanotribology Laboratory, Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, United States; email: agarwala@fiu.edu |
| Appears in Collections: | Journal Publications [MT] |
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