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- W4231654501 abstract "Fe-20Al-5Ti (at.%) single crystals composed of the bcc Fe-Al matrix and the Fe 2 AlTi precipitates with the L2 1 structure was examined. In the single crystals furnace-cooled (FC) from 1373 K to room temperature, coarse Fe 2 AlTi phase about 300 nm in diameter were precipitated in the bcc matrix. A misfit strain and a dissolution temperature of the L2 1 precipitates are +0.59% and 1151 K, respectively. The single crystals exhibited high yield stress above 600 MPa up to 973 K while further increase in temperature resulted in a decrease in yield stress due to the dissolution of the precipitates. In the FC crystals, 1/2<111> dislocations in the bcc matrix bypassed the coarse L2 1 precipitates due to their large misfit strain, resulting in high strength. In contrast, the fine L2 1 precipitates about 30 nm in diameter were observed in the crystals after solutionization and annealing at 873 K. The crystals with the fine L2 1 precipitates demonstrated high yield stress above 1100 MPa at and below 773 K. Uncoupled or paired 1/2<111> dislocations cut the fine L2 1 precipitates, leaving an anti-phase boundary (APB) inside the precipitates. The APB inside the precipitates was considered to be responsible for strong precipitation hardening." @default.
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- W4231654501 date "2018-12-01" @default.
- W4231654501 modified "2023-09-30" @default.
- W4231654501 title "Deformation Behavior of Fe-Al Single Crystals Containing Fe<sub>2</sub>AlTi Precipitates" @default.
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- W4231654501 doi "https://doi.org/10.4028/www.scientific.net/msf.941.1372" @default.
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