Microstructural evolution of ECAPed 1050 alloy under magnetic annealing
Hardness and microstructure evolutions in 1050 aluminum alloy prepared by equal-channel angular pressing (ECAP) were inves- tigated by hardness testing, optical microscopy, and transmission electron microscopy after samples were annealed at different temperatures for 1 h both in the absence and pres...
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Veröffentlicht in: | International journal of minerals, metallurgy and materials metallurgy and materials, 2014-12, Vol.21 (12), p.1205-1214 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Hardness and microstructure evolutions in 1050 aluminum alloy prepared by equal-channel angular pressing (ECAP) were inves- tigated by hardness testing, optical microscopy, and transmission electron microscopy after samples were annealed at different temperatures for 1 h both in the absence and presence of a 12-T magnetic field. The results showed that the hardness of samples after magnetic annealing were lower than that of samples after normal annealing at 150-250℃, but it was higher than that of samples after normal annealing at 〉250℃. During annealing, the rate of softening was faster, and the grains were more homogeneous in 8-ECAPed samples than in 2-ECAPed samples. A rapid grain growth occurred when 2-ECAPed samples were annealed at high temperature (〉300℃). The magnetic field enhanced the mobility of dislocations and grain boundaries. A more homogeneous grain size was observed in samples prepared under an applied magnetic field. |
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ISSN: | 1674-4799 1869-103X |
DOI: | 10.1007/s12613-014-1028-0 |