Microstructural Evolution of a Cold Roll-Bonded Multi-Layer Complex Aluminum Sheet with Annealing

Jo, Sang-Hyeon; Lee, Seong-Hee

doi:10.3740/mrsk.2022.32.2.72

Cited by 4 publications

(5 citation statements)

References 15 publications

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“…The as-aRB-processed specimen showed an ultrafine grained structure with average grain diameter of 150 nm, as shown in the figure. This indicates that the ultra-grain refinement was successfully attained by 4c of the multi-stack aRB, different from the 2c aRB in the previous study [20]. From the inverse pole figure, it is found that {110}//nD texture, a component of deformation texture, developed.…”

Section: Resultscontrasting

confidence: 77%

“…3 shows the change in texture components with increasing the annealing temperature. The specimen annealed at 300℃ had both the [001]//Nd component of typical shown in previous study [20]. Here, the reason why a kind of abnormal texture developed in the specimen annealed at 500℃ is probably that the specimen was severely plastic deformed by 4c of the multi-stack aRB before annealing.…”

Section: Resultssupporting

confidence: 61%

“…In this way, if the stacking number was increased per aRB cycle, ultrafine grain refinement would be attained very effectively. The authors also report in previous study the changes in microstructure and mechanical properties of the aa1050/ aa5052/aa6061/aa1050 alloys fabricated by two cycles of the multi-stack aRB with annealing temperature [19,20]. The study found that heterogeneous microstructure consisting of both fine and coarse grains could be developed in the complex al alloy through the aRB and subsequent annealing [20], however, ultrafine grains did not develop due to the lack of aRB cycles.…”

Section: Introductionmentioning

confidence: 74%

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Changes in Microstructure and Texture of a Multi-Stack Accumulative Roll Bonding Processed Complex Aluminum Alloy with Annealing

Jo,

Lee

2024

Archives of Metallurgy and Materials

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Changes in MiCrostruCture and texture of a Multi-staCk aCCuMulative roll Bonding ProCessed CoMPlex aluMinuM alloy with annealingChanges in the microstructure and texture with annealing temperature of a nanostructured complex aluminum alloy fabricated by multi-stack accumulative Roll Bonding (aRB) process using various al alloys are investigated in detail. The aRB process is performed up to 4 cycles without lubrication at room temperature. The specimen fabricated by the aRB is a multi-layer aluminum alloy sheet in which the aa1050, aa5052 and aa6061 al alloys are alternately stacked to each other. The average grain size of the starting material is 140 μm, but after 4 cycles of the ARB process, this is reduced to 150 nm. The complex Al alloy still shows an ultrafine grained microstructure at annealing temperatures up to 250℃, but after annealing at 300℃, it exhibits a heterogeneous structure containing both the ultrafine grains and the coarse grains due to the occurrence of discontinuous recrystallization. The specimens annealed at temperatures above 300 ℃ also show a heterogeneous microstructure even if the heterogeneities of grain size differ from each other. The texture develops abnormally at higher annealing temperatures; the deformation textures are developed as [112]//nD and [111]//nD components, even in the recrystallized specimens. as the annealing temperature increases, the number fraction of the high-angle grain boundaries gradually decreases. The changes in microstructure and texture of the specimens with increase of the annealing temperature are compared to those of the specimens processed by 2-cycle of the aRB.

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Section: Resultscontrasting

confidence: 77%

Section: Resultssupporting

confidence: 61%

Section: Introductionmentioning

confidence: 74%

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Changes in Microstructure and Texture of a Multi-Stack Accumulative Roll Bonding Processed Complex Aluminum Alloy with Annealing

Jo,

Lee

2024

Archives of Metallurgy and Materials

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“…Tere is a minimum in the wear loss's lowering trend at high reinforcement volume fraction and Rs, which then starts to climb again. how many reinforcement particles there are for every hundred matrix particles [26]. As the mixture is stirred, the smaller matrix particles can more efectively fll the spaces between the larger reinforcement particles.…”

Section: Wear Behaviormentioning

confidence: 99%

Study of Microstructure and Wear Resistance of AA5052/B4C Nanocomposites as a Function of Volume Fraction Reinforcement to Particle Size Ratio by ANN

Kumar

Balamurugan²,

Suresh³

et al. 2023

Journal of Chemistry

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The effects of the percentage volume of reinforcement, the ratio of reinforcement, and the matrix size of particles on the wear behavior of AA5052/B4C metal matrix composites (MMCs) examine. This research examines a model function developed from an artificial neural network (ANN). AA5052/B4C composites bent using a powder metallurgy technique to hardness and ball-on-disc wear testing. There are two exemptions such as (1) when the percentage volume of reinforcement is less than 8% and (2) when the ratio of reinforcement particle size (Rs) and matrix particle size (Ms) increases before decreasing. The results show that wear loss decreases with increasing percentage volume of reinforcement and ratio of Rs and Ms. In the second case, wear loss is increased at high levels of percentage volume (14%) since the proportion of reinforcement and matrix size of the particle is close to 1. When the volume percentage of reinforcement is high (14%) and the matrix and reinforcement particle sizes are substantial (120 m), the reinforcement particles become dislodged and break. Because these broken-up particles are easily removed from the surface, the material’s wear resistance is reduced. In this case, raising the volume fraction yields a uniformly higher hardness for all Rs/Ms values; hence, composites with lower reinforcement volume percentages show better wear resistance. Hardness and wear resistance have no relationship with one another.

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“…10) A multilayer cladding sheets can be considered as a method to improve both strength and formability. [11][12][13][14][15][16][17][18] Multi-layer cladding sheets were originally designed to maximize the advantages of various types of metals, and have been mainly manufactured by roll-bonding process. It is very important for rollbonding process to optimize roll-bonding conditions such as kinds of metals, rolling reduction, surface treatment, and heat treatment because the roll-bonding must be succeeded at the same time as plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of AA6061/AA5052/AA1050 Alloy Fabricated by Cold Roll-Bonding and Subsequently Annealed

Lee,

Jo,

Jeon

2023

Korean. J. Mater. Res.

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Changes in the microstructure and mechanical properties of as-roll-bonded AA6061/AA5052/AA1050 threelayered sheet with increasing annealing temperature were investigated in detail. The commercial AA6061, AA5052 and AA1050 sheets with 2 mm thickness were roll-bonded by multi-pass rolling at ambient temperature. The roll-bonded Al sheets were then annealed for 1 h at various temperatures from 200 to 400 °C. The specimens annealed up to 250 °C showed a typical deformation structure where the grains are elongated in the rolling direction in all regions. However, after annealing at 300 °C, while AA6061 and AA1050 regions still retained the deformation structure, but AA5052 region changed into complete recrystallization. For all the annealed materials, the fraction of high angle grain boundaries was lower than that of low angle grain boundaries. In addition, while the rolling texture of the {110}<112> and {123}<634> components strongly developed in the AA6061 and AA1050 regions, in the AA5052 region the recrystallization texture of the {100}<001> component developed. After annealing at 350 °C the recrystallization texture developed in all regions. The as-rolled material exhibited a relatively high tensile strength of 282 MPa and elongation of 18 %. However, the tensile strength decreased and the elongation increased gradually with the increase in annealing temperature. The changes in mechanical properties with increasing annealing temperature were compared with those of other three-layered Al sheets fabricated in previous studies.

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Microstructural Evolution of a Cold Roll-Bonded Multi-Layer Complex Aluminum Sheet with Annealing

Cited by 4 publications

References 15 publications

Changes in Microstructure and Texture of a Multi-Stack Accumulative Roll Bonding Processed Complex Aluminum Alloy with Annealing

Changes in Microstructure and Texture of a Multi-Stack Accumulative Roll Bonding Processed Complex Aluminum Alloy with Annealing

Study of Microstructure and Wear Resistance of AA5052/B4C Nanocomposites as a Function of Volume Fraction Reinforcement to Particle Size Ratio by ANN

Microstructure and Mechanical Properties of AA6061/AA5052/AA1050 Alloy Fabricated by Cold Roll-Bonding and Subsequently Annealed

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