The enhancement of warm-temperature mechanical properties of ultrafine-grained aluminum by carbon nanotubes

H. J. Choi; J. H. Shin; D. H. Bae

doi:10.1016/j.msea.2011.04.020

The enhancement of warm-temperature mechanical properties of ultrafine-grained aluminum by carbon nanotubes

H. J. Choi, J. H. Shin, D. H. Bae

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Ultrafine-grained (UFG) aluminum and UFG composite containing carbon nanotubes (CNTs) are fabricated by hot-rolling the ball-milled powder, and their mechanical properties are investigated at warm temperatures ranging from 423 to 523. K. A number of voids are formed at the non-equilibrium grain boundaries in the UFG aluminum during tensile deformation at warm temperatures, resulting in poor ductility. However, the UFG composite exhibits enhanced ductility as well as superior yield stress. CNTs suppress the development of non-equilibrium grain boundaries and the formation of voids, giving rise to notably enhanced ductility at warm temperatures.

Original language	English
Pages (from-to)	6134-6139
Number of pages	6
Journal	Materials Science and Engineering A
Volume	528
Issue number	19-20
DOIs	https://doi.org/10.1016/j.msea.2011.04.020
Publication status	Published - 2011 Jul 25

Bibliographical note

Funding Information:
This research was supported by the Korea Science and Engineering Foundation Grant (No. 2010-0016139 ) and the Second Stage of Brain Korea 21 Project in 2010.

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2011.04.020

Cite this

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abstract = "Ultrafine-grained (UFG) aluminum and UFG composite containing carbon nanotubes (CNTs) are fabricated by hot-rolling the ball-milled powder, and their mechanical properties are investigated at warm temperatures ranging from 423 to 523. K. A number of voids are formed at the non-equilibrium grain boundaries in the UFG aluminum during tensile deformation at warm temperatures, resulting in poor ductility. However, the UFG composite exhibits enhanced ductility as well as superior yield stress. CNTs suppress the development of non-equilibrium grain boundaries and the formation of voids, giving rise to notably enhanced ductility at warm temperatures.",

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AU - Choi, H. J.

AU - Shin, J. H.

AU - Bae, D. H.

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The enhancement of warm-temperature mechanical properties of ultrafine-grained aluminum by carbon nanotubes

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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