Synthesis of ultra high strength Al–Mg–Si alloy sheets by differential speed rolling

Kim, Woo Jin; Wang, J.Y.; Choi, Se-Weon; Choi, Hyun‐Jung; Sohn, H.T.

doi:10.1016/j.msea.2009.05.010

Cited by 35 publications

(21 citation statements)

References 13 publications

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“…The present data on aging of ASR performed in the severe deformation regime (up to 5,50 equivalent strain) are indeed in good agreement with established evidence showing that kinetics and morphology of transition precipitates are deeply altered by SPD and that new opportunities for isothermal aging at lower temperatures deserve to be explored owing to accelerated diffusion of alloying elements in the heavily dislocated alloy structure. It is worth mentioning that studies were carried recently on 6061 and 6063 Al alloys subjected to room temperature and cryogenic rolling in the severe plastic deformation regime [20,21]. It was observed that low-temperature processing causes substantial suppression of structure recovery during straining and hence preserves higher dislocation densities in the samples, increasing the driving force for sub-microcrystalline grain development.…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Aging Behaviour of Al-Mg-Si Alloys Subjected to Severe Plastic Deformation by ECAP and Cold Asymmetric Rolling

Farè

Lecis

Vedani

2011

Journal of Metallurgy

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A study was carried out on aging behaviour of a 6082 alloy processed by two different severe plastic deformation techniques: ECAP and asymmetric rolling. Both techniques were able to generate an ultrafine-grained structure in samples processed at room temperature. It was stated that severe straining promotes marked changes in the postdeformation aging kinetics. The peaks of β /β transition phases were anticipated and of progressively reduced intensity over the coarse grained alloy. A further peak accounting for onset of recrystallization also appeared in the most severely deformed samples. Full consistency in peak shape and position was found when comparing materials processed by ECAP and asymmetric rolling. Isothermal aging treatments performed at 180• C revealed that in the severely deformed samples, aging became so fast that the hardness curves continuously decreased due to overwhelming effects of structure restoration. On the contrary, aging at 130• C offers good opportunities for fully exploiting the precipitate hardening effects in the ultrafine-grained alloy.

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Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Aging Behaviour of Al-Mg-Si Alloys Subjected to Severe Plastic Deformation by ECAP and Cold Asymmetric Rolling

Farè

Lecis

Vedani

2011

Journal of Metallurgy

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“…For ESR, shear deformation is restricted to the near surface region [8,9]. In the case of DSR, the volume that is affected by shear is strongly material dependent as shown in numerous studies on different materials, e.g., steel, copper, aluminium and niobium [3,[10][11][12][13][14][15]. Special attention is paid to the investigation of DSR of hexagonal metals such as magnesium [4,[16][17][18] and titanium [6,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Ti/Al Multi-Layered Sheets: Differential Speed Rolling (Part B)

Romberg

Freudenberger

Watanabe

et al. 2016

Metals

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Differential speed rolling has been applied to multi-layered Ti/Al composite sheets, obtained from accumulative roll bonding with intermediate heat treatments being applied. In comparison to conventional rolling, differential speed rolling is more efficient in strengthening the composite due to the more pronounced grain refinement. Severe plastic deformation by means of rolling becomes feasible if the evolution of common rolling textures in the Ti layers is retarded. In this condition, a maximum strength level of the composites is achieved, i.e., an ultimate tensile strength of 464 MPa, while the strain to failure amounts to 6.8%. The deformation has been observed for multi-layered composites. In combination with the analysis of the microstructure, this has been correlated to the mechanical properties.

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“…Subsequently, they combined cryorolling and aging treatment to produce 6XXX Al alloys with ultra-high strength and ductility [5]. Kim et al [6] produced a high-strength 6061 Al alloy using the differential speed rolling process. Furthermore, Rezaei et al [7] fabricated a high-strength 6XXX Al alloy using a new method, called accumulative roll bonding (ARB) [8].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, Rezaei et al [7] fabricated a high-strength 6XXX Al alloy using a new method, called accumulative roll bonding (ARB) [8]. The tensile strength of the 6XXX Al alloys produced using these rolling techniques can be 2-3 times higher than the solution treatment state samples [4][5][6][7]. However, each method has its own limitations for commercial applications, such as the need for a cryogenic-temperature environment (in cryorolling), requirement for a special processing equipment (in differential speed rolling), and limited size (in ARB).…”

Section: Introductionmentioning

confidence: 99%

Preparation of high-strength Al-Mg-Si-Cu-Fe alloy via heat treatment and rolling

Liu

Wang

et al. 2014

Int J Miner Metall Mater

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An Al-Mg-Si-Cu-Fe alloy was solid-solution treated at 560°C for 3 h and then cooled by water quenching or furnace cooling. The alloy samples which underwent cooling by these two methods were rolled at different temperatures. The microstructure and mechanical properties of the rolled alloys were investigated by optical microscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction analysis, and tensile testing. For the water-quenched alloys, the peak tensile strength and elongation occurred at a rolling temperature of 180°C. For the furnace-cooled alloys, the tensile strength decreased initially, until the rolling temperature of 420°C, and then increased; the elongation increased consistently with increasing rolling temperature. The effects of grain boundary hardening and dislocation hardening on the mechanical properties of these rolled alloys decreased with increases in rolling temperature. The mechanical properties of the 180°C rolling water-quenched alloy were also improved by the presence of β″ phase. Above 420°C, the effect of solid-solution hardening on the mechanical properties of the rolled alloys increased with increases in rolling temperature.

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Synthesis of ultra high strength Al–Mg–Si alloy sheets by differential speed rolling

Cited by 35 publications

References 13 publications

Aging Behaviour of Al-Mg-Si Alloys Subjected to Severe Plastic Deformation by ECAP and Cold Asymmetric Rolling

Aging Behaviour of Al-Mg-Si Alloys Subjected to Severe Plastic Deformation by ECAP and Cold Asymmetric Rolling

Ti/Al Multi-Layered Sheets: Differential Speed Rolling (Part B)

Preparation of high-strength Al-Mg-Si-Cu-Fe alloy via heat treatment and rolling

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