The structure and properties of 2024 aluminum composites reinforced with TiO2 nanoparticles

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

doi:10.1016/j.msea.2014.04.038

The structure and properties of 2024 aluminum composites reinforced with TiO₂ nanoparticles

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

Department of Materials Science and Engineering

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

26 Citations (Scopus)

Abstract

The ultrafine-grained 2024 aluminum alloy (A2024) and A2024 matrix composites containing titanium oxide (TiO₂, ~50nm in size) are fabricated by conventional mechanical milling and hot-press process. With the aid of the optimum fabrication process, the TiO₂ particles are well dispersed in the A2024 matrix. Owing to the characteristics of the TiO₂ particles, the interface structure is found to be clean and clear without any micropores and contaminations. Without the strengthening by precipitates, the hardness, elastic modulus and yield stress are effectively increased with the increasing volume content of TiO₂ particles up to 10vol%. The strengthening effects by introducing TiO₂ particles are evaluated by the thermally induced dislocation effect and the Orowan strengthening effect. The composite in the present study has great potential for application as structural materials.

Original language	English
Pages (from-to)	605-610
Number of pages	6
Journal	Materials Science and Engineering A
Volume	607
DOIs	https://doi.org/10.1016/j.msea.2014.04.038
Publication status	Published - 2014 Aug 15

Bibliographical note

Funding Information:
This research was supported by the Korea Science and Engineering Foundation Grant (No. NRF-2012R1A1A2042329 ).

All Science Journal Classification (ASJC) codes

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

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AU - Choi, H. J.

AU - Bae, D. H.

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