The Influence of Initial Microstructure on the Recrystallization Textures of Aluminium Alloys after Hot Deformation by Laboratory Simulation

Bolingbroke, R.K.; Marshall, G. J.; Marshall, E. D.; Ricks, R. A.

doi:10.4028/www.scientific.net/msf.157-162.1145

Cited by 12 publications

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“…The results that the gray precipitation were relatively unstable Al 6 (Mn,Fe) particles and that the black ones were relatively stable -Al 12 (Mn,Fe) 3 Si particles support the results in the literature. [1][2][3][4] Step-homogenization yielded all of the particle characteristics obtained under low-temperature and hightemperature homogenization : in the last step at 460 C Â 3 h under condition (c), since the sample tended to exhibit heterogeneous precipitation on second phase particles precipitated at the beginning of the 600 C Â 9 h step, the particles became larger, and the precipitation density changed slightly. The rectangular particles and two-colored particles were also formed for these reasons.…”

Section: Resultsmentioning

confidence: 99%

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Effect of Homogenization on Recrystallization and Precipitation Behavior of 3003 Aluminum Alloy

Huang

Tsai

2008

Mater. Trans.

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This investigation studies 3003 aluminum alloys for automobile heat exchangers. The effects of precipitation in homogenization treatments, recrystallization in extrusion and brazing on extrusion forming ability and final material properties are examined. At first, fine second phase particles were precipitated during the 460 C Â 9 h homogenization treatment and coarse particles were precipitated by homogenization treatments with 600 C Â 9 h. Second, when the precipitation were not plentiful and fine enough during extrusion, the amount of solution dominated the extrusion breakout pressure, and recrystallization was easier; on the contrary, the domination state was replaced by plentiful and fine precipitated particles, and recrystallization became more difficult. Additionally, the hardness after extrusion was lower in the complete recrystallization position, and higher in the incomplete recrystallization position. Finally, in brazing, the sample under the 460 C Â 9 h condition (a) underwent full recrystallization from partial recrystallization with a reduction in strength; the local position of the edge of the sample under the 600 C Â 9 h ! 460 C Â 3 h condition (c) exhibited a second recrystallization and a significant drop in hardness.

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Section: Resultsmentioning

confidence: 99%

“…Many studies about such homogenization have been published. [1][2][3][4] Most of the literature has focused on the rolling in 3000-series aluminum alloy because it is widely used to make beverage containers. [5][6][7][8][9] Some studies have also discussed the feasibility of precipitation hardening by heat treatments.…”

Section: Introductionmentioning

confidence: 99%

Effect of Homogenization on Recrystallization and Precipitation Behavior of 3003 Aluminum Alloy

Huang

Tsai

2008

Mater. Trans.

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“…MICROSTRUCTURAL development during deformation and annealing [1, of aluminum alloys is a well-studied subject with much published literature. One of the issues in the literature has been the relative stability of deformed orientation(s) with changes in deformation conditions: [1][2][3][4][5][6][7][8][9][10][11][12][13][15][16][17][18][19][20][21][22][23]25,28] strain path, strain, strain rate, and temperature. The last two factors are usually coupled in the form of a Zener-Holloman parameter (Z).…”

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confidence: 99%

Relative Stability of Deformed Cube in Warm and Hot Deformed AA6022: Possible Role of Strain-Induced Boundary Migration

Raveendra

Paranjape

Mishra

et al. 2009

Metall Mater Trans A

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“…The sample orientation makes little contribution to the volume fraction of deformed cube grains [34].…”

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“…The cube component is metastable during deformation and the strength of all its variants (e.g. RD and TD rotated cube) decreases with increases in the level of strain [33,34]. Analysis of samples deformed in plane strain compression with different starting cube textures, indicate its importance in the texture evolution after recrystallization.…”

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confidence: 99%

Reduction of Annealing Times for Energy Conservation in Aluminum

Rollett¹,

Weiland²,

Alvi³

et al. 2005

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and the Pennsylvania Technology Investment Authority (PTIA) to make processing of aluminum less costly and more energy efficient. Researchers in the Department of Materials Science and Engineering have investigated how annealing processes in the early stages of aluminum processing affect the structure and properties of the material. Annealing at high temperatures consumes significant amounts of time and energy. By making detailed measurements of the crystallography and morphology of internal structural changes they have generated new information that will provide a scientific basis for shortening processing times and consuming less energy during annealing. Background:The status of the Domestic Technology for the thermomechanical processing of aluminum alloy intended for sheet and plate product is as follows. Hot rolling processes are aimed at breaking down as-cast structures in Direct-Chill (DC) ingots. Critical to the success of this stage of the processing is the refinement of the as-cast microstructure in terms of both grain morphology and the crystallographic orientations present; we will refer to the latter as texture. 2 particularly important to the application of such materials as 5xxx for can closures and 3xxx for beverage can stock. In particular, it is standard practice to anneal partially broken-down slabs for long times in order to ensure that recrystallization is completed before continuing the hot rolling process. Simple models exist that describe the rate at which the recrystallization process takes place but no information is available on the texture development. This proposal project will remedy that lack by measuring texture-dependent recrystallization rates (kinetics). Status:The project is complete. Three different commercial purity aluminum alloys (AA1050, AA5005 and AA3003) were studied. The main applications of these (non-heat treatable) alloys are beverage cans, automotive products etc. Recrystallization and texture evolution are two very important transformations in the thermo-mechanical processing of these alloys. These transformations are of critical importance for aluminum industry as they are directly related to energy consumption and properties of the finished products. The main aim of this project is to further increase our current understanding of recrystallization and texture evolution using advanced analytical tools like Electron Backscatter Diffraction (EBSD). The project was divided into two main parts -experimental data collection and extraction of critical parameters from experimental data forming one part and simulation of recrystallization from the experimental data and comparison of experimental results with simulation being the other part. The experimental data collection and analysis involved annealing of asreceived samples and scanning them in an EBSD system. The main approach followed in the experimental analysis was that of identification of the most important parameters required for quantification of recrystallization and texture evolution. This analysis required de...

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The Influence of Initial Microstructure on the Recrystallization Textures of Aluminium Alloys after Hot Deformation by Laboratory Simulation

Cited by 12 publications

References 0 publications

Effect of Homogenization on Recrystallization and Precipitation Behavior of 3003 Aluminum Alloy

Effect of Homogenization on Recrystallization and Precipitation Behavior of 3003 Aluminum Alloy

Relative Stability of Deformed Cube in Warm and Hot Deformed AA6022: Possible Role of Strain-Induced Boundary Migration

Reduction of Annealing Times for Energy Conservation in Aluminum

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