Recrystallization textures and microstructures of Al-0.3%Cu alloy after deformation to high strains

Li, X.R.; Wakeel, Aneela; Huang, Tianlin; Wu, Guilin; Huang, Xiaoxiao

doi:10.1088/1757-899x/89/1/012032

Cited by 6 publications

(8 citation statements)

References 10 publications

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“…A previous study showed that the ultra-high pure Al (99.9996%) [6] has a very poor thermal stability during cold rolling and dynamic recrystallization may take pace when the rolling strain is above 30%. The addition of 0.3% Cu enabled the generation of the nanoscale lamellar structure [17,18]. The lamellar boundary spacing is comparable with that reported for commercial purity Al (99.2 -99.5% pure) [20][21][22][23] deformed by accumulative roll bonding (ARB) to 6 cycles.…”

Section: Materials and Experimentalsupporting

confidence: 70%

“…Different alloying elements may have different efficiency in stabilizing nanostructured metals [15,16]. In our present studies [17][18], we found that a nanostructured lamellar structure with an average lamellar boundary spacing of 200 nm can be produced after 98% cold rolling in an Al-0.3%Cu alloy with an ultra-high pure Al matrix (99.9996%) and an addition of a small amount (0.3wt%) Cu. In this study, the distribution of the Cu element is characterized in detail to understand the mechanism of Cu in stabilizing the nanostructure.…”

Section: Introductionsupporting

confidence: 48%

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Characterization of Cu Distribution in an Al-0.3%Cu Alloy Cold Rolled to 98%

Shuai

Huang

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this study, the distribution of Cu element in a Al (99.9996% purity)-0.3%Cu alloy cold rolled to 98% has been characterized in detail by using three-dimensional atom probe (3DAP) and ChemiSTEM techniques. The cold rolled structure is a typical high strain lamellar structure with an average boundary spacing of 200 nm, indicating a strong role of the small amount of Cu element in stabilizing the microstructure to form the fine scale structure. A heavy segregation of Cu element in the lamellar boundaries of high angles has been observed and the Cu concentration in the boundaries can be as high as 20 times of the nominal concentration of the alloy, which is considered as the main reason for a formation of a stable nanoscale lamellar structure.

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Section: Materials and Experimentalsupporting

confidence: 70%

Section: Introductionsupporting

confidence: 48%

Characterization of Cu Distribution in an Al-0.3%Cu Alloy Cold Rolled to 98%

Shuai

Huang

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…A rather strong Goss component was found in our preliminary study [15] of a heavily rolled and subsequently annealed Al-0.3%Cu alloy. After recrystallization at 200 °C, the fraction of the Goss texture in this alloy was approximately 40%.…”

Section: Introductionmentioning

confidence: 54%

“…X-ray texture measurements revealed different dominant orientations in specimens taken from several different regions of the forged material, thus reflecting the presence of very large grains of varying orientations. The only consistent result obtained from the different regions was an increased concentration of orientations near the Goss component [15]. The microstructural examination of the forged sample demonstrated that the initial grains could still be clearly identified in the microstructure and that they were subdivided by dislocation boundaries.…”

Section: Methodsmentioning

confidence: 88%

“…After recrystallization at 200 °C, the fraction of the Goss texture in this alloy was approximately 40%. The very limited microstructural analysis presented in [15] was insufficient to clearly understand how the deformed material evolved to produce such a strong Goss texture during annealing. Therefore, the purpose of the present work is to characterize in detail the development of this strong texture during isothermal annealing covering both nucleation and growth of Goss-oriented grains.…”

Section: Introductionmentioning

confidence: 99%

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Development of Goss texture in Al–0.3%Cu annealed after heavy rolling

Shuai

Huang

et al. 2018

Journal of Alloys and Compounds

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Strengthening mechanisms and Hall-Petch stress of ultrafine grained Al-0.3%Cu

et al. 2018

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An ultrafine grained Al-0.3wt. %Cu has been produced by cold rolling to a thickness reduction of 98% (ε vM =4.5). The deformed structure is a typical lamellar structure with a boundary spacing of 200nm as characterized by transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD). Coarsening of the deformed structure to recrystallization is achieved by heat treatment in the range of 100~300℃.Good thermal stability has been observed up to 175℃ with some segregation of Cu to the boundaries as observed by 3D atom probe characterization. Tensile tests have shown a flow stress (0.2% offset) of 198MPa with continuous flow with no yield drop and Lüders elongation. To quantify the contribution of boundary strengthening to the flow stress, dislocation strengthening and solid solution hardening have been calculated and subtracted from the flow stress. It has been found that boundary strengthening can be expressed by a Hall-Petch relationship and that these constants in this equation are in very good agreement with precious observation of recrystallized pure polycrystalline aluminium with a grain size in the tens of micrometer range. Thereby the Hall-Petch relationship of aluminium can be extended an order of magnitude from the micrometer to the sub-micrometer range, which is of both scientific and technical importance.

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Recrystallization textures and microstructures of Al-0.3%Cu alloy after deformation to high strains

Cited by 6 publications

References 10 publications

Characterization of Cu Distribution in an Al-0.3%Cu Alloy Cold Rolled to 98%

Characterization of Cu Distribution in an Al-0.3%Cu Alloy Cold Rolled to 98%

Development of Goss texture in Al–0.3%Cu annealed after heavy rolling

Strengthening mechanisms and Hall-Petch stress of ultrafine grained Al-0.3%Cu

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