In-situ annealing and computation study of cube texture development in a commercial aluminum alloy

Sukhopar, Olga; Gottstein, Günter

doi:10.3139/146.111425

Cited by 6 publications

(5 citation statements)

References 37 publications

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“…2(c)) and mixed texture comprised of a cube recrystallization texture with medium intensities of a retained rolling, or R, texture (Fig. 3(c)) [11][12][13][14]. Accordingly, the interannealed sheet revealed a rather smooth eight-ear profile (Fig.…”

Section: Discussionmentioning

confidence: 99%

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Temper rolling to control texture and earing in aluminium alloy AA 5050A

Engler

Knarbakk

2021

Journal of Materials Processing Technology

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The development of crystallographic texture during the thermo-mechanical processing of aluminium sheet is known to result in the formation of pronounced plastic anisotropy, including the wellknown earing phenomenon. In the present study we track the evolution of texture, microstructure and earing profiles in sheets of Al alloy AA 5050A during down-stream processing according to a process route resulting in temper H16 after cold rolling and temper H44 after lacquering. This process, which includes interannealing followed by a mild final pass of temper rolling, was designed for producing medium-strength sheet with low earing properties. Besides the experimental characterization of the evolution of microstructure, texture and resulting earing profiles along the process chain, means to optimize the processing by adapting the intermediate thickness are addressed.

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Section: Discussionmentioning

confidence: 99%

“…Such mixed cube + R textures are the typical recrystallization textures of many cold rolled, soft annealed Al alloys (e.g. [11][12][13][14]). Accordingly, the interannealed material showed a very smooth eight-ear profile (Fig.…”

Section: Standard Processing Routementioning

confidence: 99%

Temper rolling to control texture and earing in aluminium alloy AA 5050A

Engler

Knarbakk

2021

Journal of Materials Processing Technology

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“…As expressed in Equation ( 3), the process of nucleation is directly affected by the degree of strain. In the case of the Al alloy deformed with the strain of ~1.38 and annealed at 300 • C, the deformed microstructure contained Cube bands with a length of 34.7 µm, thickness of 3.25 µm, and Cube band spacing of 26.9 µm [54]. This microstructural heterogeneity with the approximate elliptic volume of 1.27 × 10 −14 m 3 tended to produce at least three nuclei at low annealing temperature (T = 300 • C) [54].…”

Section: Modeling the Rx Kineticsmentioning

confidence: 99%

“…In the case of the Al alloy deformed with the strain of ~1.38 and annealed at 300 • C, the deformed microstructure contained Cube bands with a length of 34.7 µm, thickness of 3.25 µm, and Cube band spacing of 26.9 µm [54]. This microstructural heterogeneity with the approximate elliptic volume of 1.27 × 10 −14 m 3 tended to produce at least three nuclei at low annealing temperature (T = 300 • C) [54]. In this case, the total number of nuclei obtained for the incubation period of 1 s is 2.36 × 10 14 m −3 s −1 .…”

Section: Modeling the Rx Kineticsmentioning

confidence: 99%

Investigation of Recrystallization Kinetics in 1050 Al Alloy by Experimental Evidence and Modeling Approach

Chakravarty,

Bátorfi,

Sidor

2023

Materials

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The recrystallization (RX) kinetics of commercially pure Al alloy is studied under the scope of annealing temperature, time, and degree of deformation. To examine the distribution of recrystallization, Johnson–Mehl–Avrami–Kolmogorov (JMAK) theory is employed, where the path of microstructural transformation from the deformed state to the fully recovered one is studied as a function of the volume fraction of recrystallized grains (XV) and annealing time. The drop in hardness is recorded for the samples at various stages of annealing with a corresponding decrease in stored energy as the annealing time increases. The stored energy obtained from the hardness results and Orientation Imaging Microscopy (OIM)-based method is found to be in good agreement with each other, proving the efficiency of both techniques. To determine the volume fraction of the recrystallized microstructure, data obtained from Vickers hardness measurements are used. Various parameters associated with recrystallization statistics such as the critical radius of nuclei, the incubation period, and the mobility of High-Angle Grain Boundaries (HAGB) were derived from the experimental evidence. The experimental data also suggest a sharp drop in the velocity of HAGB as the RX transformation process approaches its completion, which is found to be a direct result of a drop in stored energy. A softening window between 42 s and 55 s is identified for our experimental data where the hardness, stored energy, and velocity of HAGB drops very sharply, and the maximum fraction of deformed grains is expected to be converted to the recrystallized ones. Along with experimental observations, an analytical model was developed, which helps to approximate the kinetics of RX and corresponding parameters for various annealing temperatures and strains while revealing the characteristic feature of Avrami exponent n. Both experimental evidence and model data reveal a very strong dependency of recrystallization behavior on the stored energy.

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“…The microscopic mechanism behind the huge advantage of cube grains during recrystallization is still subject to debate, which is summarised in the textbook by Humphreys et al [12]. Recent results from in situ or quasi in situ micro-texture measurements of recrystallization by Albou et al [13] and Sukhopar and Gottstein [14] found cube nuclei at deformed cube bands and in the form of fragments inside differently oriented grains.…”

Section: Introductionmentioning

confidence: 99%

Recrystallized cube grains in an Al–Mg–Si alloy dependent on prior cold rolling

Falkinger¹,

Regl²,

Mitsche

2019

Materials Science and Technology

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This paper reports on the experimental investigation of an industrial Al–Mg–Si alloy, which was subjected to different cold rolling reductions and subsequently solution annealed. Based on large-scale electron backscatter detection (EBSD) measurements, it provides an analysis of the area fraction, size and number density of cube grains in the fully recrystallized microstructure. The area fraction and number density of recrystallized cube grains increase continuously with increasing strain, but the cube grain size equals the average grain size independent of prior strain. The recrystallization advantage of cube grains decreases rapidly with increasing misorientation from the ideal cube component. The technological relevance of this misorientation dependence and its possible micro-mechanical origins are discussed.

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In-situ annealing and computation study of cube texture development in a commercial aluminum alloy

Cited by 6 publications

References 37 publications

Temper rolling to control texture and earing in aluminium alloy AA 5050A

Temper rolling to control texture and earing in aluminium alloy AA 5050A

Investigation of Recrystallization Kinetics in 1050 Al Alloy by Experimental Evidence and Modeling Approach

Recrystallized cube grains in an Al–Mg–Si alloy dependent on prior cold rolling

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