The Interaction between Precipitation and Recrystallization during Annealing of Cold Rolled AA6111

Go, Jongbin; Poole, Warren J.; Militzer, Matthias; Wells, Mary A.

doi:10.4028/www.scientific.net/msf.426-432.291

Cited by 5 publications

(8 citation statements)

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“…As can be seen in Fig. 6, at 300uC, the dislocation hardening component of the strength remains approximately constant suggesting that the experimental datas For comparison, the evolution of the dislocation contribution to strength with time extracted from the Sc alloy was plotted with the recovery-recrystallisation model developed by Go et al 26 for AA5754 in Fig. 8.…”

Section: Deformed Casementioning

confidence: 76%

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Yield strength of twin-belt cast Al–Mg–Sc–Zr alloy after annealing

Sohi

Poole

Sinclair

et al. 2015

Materials Science and Technology

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AA5xxx aluminium alloys are used in the automotive and packaging industries owing to their high strength and ductility. The addition of Sc and Zr to these alloys has shown promise for improving high temperature stability and therefore broadening the range of applications. This high temperature stability is due to the formation of fine Al 3 (Sc, Zr) precipitates during aging. In this work, two twin-belt cast Al-3%Mg alloys, one with 0?4% Sc and the other without Sc, were annealed at 300 and 400uC. Hardness, tensile yield stress and electrical resistivity measurements were used to examine the evolution of microstructure and strength of the alloys. These results were then utilised to develop a yield stress-precipitation model to describe simultaneous precipitation hardening and recovery.

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Section: Deformed Casementioning

confidence: 76%

“…For comparison, the evolution of the dislocation contribution to strength with time extracted from the Sc alloy was plotted with the recovery–recrystallisation model developed by Go et al . 26 for AA5754 in Fig. 8.…”

Section: Model Developmentmentioning

confidence: 99%

Yield strength of twin-belt cast Al–Mg–Sc–Zr alloy after annealing

Sohi

Poole

Sinclair

et al. 2015

Materials Science and Technology

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“…This is much higher than the reduction values in previous studies. [6][7][8][9][10][11][12] Thus, the stored energy, i.e., the driving force for recrystallization on the specimens, was presumably higher in this study than in previous studies. The increase in stored energy may enhance PSN or the nucleation at cube bands, or both.…”

Section: The Overaged Specimenmentioning

confidence: 79%

“…5,6) Recently, the effect of precipitation on the development of recrystallization texture has been studied in the 6000 series Al-Mg-Si alloys used for automotive sheets. [6][7][8][9][10][11][12] Coarse constituent particles already present before cold rolling enhance PSN, which leads to a very weak recrystallization texture. Precise ODF analysis of the recrystallization texture, however, has established the occurrence of {110} h122i and {100} h013i.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Precipitation on Development of Recrystallization Texture in a 6061 Aluminum Alloy

Kashihara

Inagaki²

2009

Mater. Trans.

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Three types of specimens, namely solution treated, peak aged and overaged specimens, were prepared from hot-rolled sheets of a commercial 6061 aluminum alloy, so that they contain precipitates different in size and distribution. These specimens were cold rolled to 95% reduction in thickness and then annealed at 300 C. The rolling texture and work hardening rate during cold rolling differed, depending on the state of the precipitate. In particular, no increase in hardness during rolling was observed in the peak aged specimen. The recrystallizations in the overaged and solution treated specimens were completed more rapidly than that in the peak aged specimen. This is interpreted to be due to pinning effect caused by precipitation and difference in driving force of recrystallization. In the overaged specimen, the recrystallization texture revealed a strong {100} h001i orientation, which has the favored orientation relationship with deformed matrix. In the peak aged specimen, the recrystallization texture revealed a {110} h111i orientation. The {100} h001i orientation was also formed, however, the intensity relative to random orientation was much weaker than that observed in the peak aged specimen.

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Abnormal Grain Growth in Electrochemically Deposited Cu Films

Militzer

Freundlich²,

Bizzotto³

2004

MSF

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Cu interconnects are essential in advanced integrated circuits to minimize the RC delay. In manufacturing these devices, Cu is deposited electrochemically using a plating bath containing organic additives. The as-deposited nanocrystalline Cu films undergo self-annealing at room temperature to form a micronsized grain structure by abnormal grain growth. Systematic experimental studies of self-annealing kinetics on model Cu films deposited on a Au substrate suggest that the rate of grain size evolution depends primarily on the initial grain size of the asdeposited film. A model for the observed abnormal grain growth process is proposed. Assuming that desorption of the organic additives leads to mobile grain boundaries, the onset of abnormal grain growth is attributed to a sufficiently low additive concentration such that a full coverage of all grain boundaries cannot be maintained. The incubation time of abnormal growth is then a logarithmic function of the initial grain size. The probability to find a growing grain is proportional to the number of grains per unit volume. This assumption is seen to be in good agreement with the experimental observations for subsequent abnormal grain growth rates. The limitations of the proposed model and the challenges to obtain further insight into the complex microstructure mechanisms during self-annealing are delineated.

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The Interaction between Precipitation and Recrystallization during Annealing of Cold Rolled AA6111

Cited by 5 publications

References 0 publications

Yield strength of twin-belt cast Al–Mg–Sc–Zr alloy after annealing

Yield strength of twin-belt cast Al–Mg–Sc–Zr alloy after annealing

Effect of Precipitation on Development of Recrystallization Texture in a 6061 Aluminum Alloy

Abnormal Grain Growth in Electrochemically Deposited Cu Films

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