Journal article
The effect of coarse second-phase particles on the rate of grain refinement during severe deformation processing
The effect of second-phase particles on the rate of grain refinement during severe deformation processing has been investigated, by comparing the microstructure evolution in an AA8079 aluminium alloy, containing 2.5 vol.% of ~2 μm particles, with that in a high purity, single-phase, Al-0.13% Mg alloy, deformed identically by ECAE to an effective strain of ten.
The materials were analysed by high-resolution EBSD orientation mapping, which revealed that grain refinement occurred at a dramatically higher rate in the particle-containing alloy. A submicron grain structure could be achieved by an effective strain of only five in the particle-containing alloy, compared to ten in the single-phase material.
The mechanisms that contribute to this acceleration of the grain refinement process are discussed.
Language: | English |
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Year: | 2003 |
Pages: | 2811-2822 |
ISSN: | 18732453 and 13596454 |
Types: | Journal article |
DOI: | 10.1016/S1359-6454(03)00086-7 |
ORCIDs: | Bowen, Jacob R. |