Effect of cryo-rolling and annealing on microstructure and properties of commercially pure aluminium

Rangaraju, Nikhil; Raghuram, T.; Krishna, B. Vamsi; Rao, K. Prasad; Venugopal, P.

doi:10.1016/j.msea.2005.03.026

Cited by 198 publications

(81 citation statements)

References 15 publications

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“…When including the effects of strain hardening for soft aluminum alloys, various models have been proposed, but the raw data deviates very little from a linear relationship when plotted manually [21,22]. In addition, there is also strong experimental evidence corroborating the linear relationship between microhardness and yield strength in 1000 series aluminum [22][23][24][25][26][27]. Some data show a deviation in the linear relationship between σ y and Hv in the softened state, but assume a y-intercept of zero, which is not necessarily consistent with experimental results, where y-intercepts of N 100 have been reported [28,29].…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Synergetic strengthening far beyond rule of mixtures in gradient structured aluminum rod

Moering

Malkin

et al. 2016

Scripta Materialia

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Gradient structured metals have been reported to exhibit high strength and high ductility. Here we report that the strength of gradient structured aluminum rod is much higher than the value calculated using the rule of mixtures. The mechanical incompatibility in the gradient structured round sample produced 3D stress states, extraordinary strengthening and good ductility. An out of plane {111} wire texture was developed during the testing, which contributes to the evolution of the stress state and mechanical behavior.

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Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Synergetic strengthening far beyond rule of mixtures in gradient structured aluminum rod

Moering

Malkin

et al. 2016

Scripta Materialia

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“…Cryorolling is a simple low-temperature rolling process in which the low temperature is maintained by liquid nitrogen. The processing also requires a relatively lower load to induce severe strain [12][13][14][15][16][17][18]. Wang et al [12] found that when pure copper was processed by cryorolling, the matrix grains imparted high strength to the samples.…”

Section: Cryorollingmentioning

confidence: 99%

“…Cryorolling has also been identified as one of the potential routes to produce bulk ultrafine grain Al alloys [13]. The microstructure and mechanical properties of a precipitation-hardened Al-Cu alloy subjected to cryorolling, low temperature annealing and ageing treatments were studied by Rangaraju et al [15], who produced ultrafine grain microstructure with improved tensile strength and good ductility. Panigrahi et al [16] discovered that both the tensile strength and yield strength of an Al-Mg-Si alloy were considerably increased due to the suppression of dynamic recovery during cryorolling.…”

Section: Cryorollingmentioning

confidence: 99%

Mechanical properties of Al–Mg–Si alloy sheets produced using asymmetric cryorolling and ageing treatment

Tieu

Lü

et al. 2013

Materials Science and Engineering: A

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An asymmetric cryorolling technique was used to reduce the thickness of an Al-Mg-Si alloy sheet from 1.5 mm to 0.19 mm. The samples were subsequently aged for 48 h at 100 degrees celcius. The hardness and tensile strength of both rolled and aged sheets increased with the number of passes up to the sixth pass, but the tensile stress decreased after the seventh pass. Investigation of the microstructure of the sheets showed that the grain size after seven passes was about 235 nm and revealed the presence of Fe-Cr-Mn-Si particles in the samples. The deformation of Fe-Cr-Mn-Si particles and sheet thickness affects the ductility when the sheet thickness is less than 0.4 mm, and the strength when the thickness is less than 0.2 mm. An asymmetric cryorolling technique was used to reduce the thickness of an Al-Mg-Si alloy sheet from 1.5 mm to 0.19 mm. The samples were subsequently aged for 48 h at 100 1C. The hardness and tensile strength of both rolled and aged sheets increased with the number of passes up to the sixth pass, but the tensile stress decreased after the seventh pass. Investigation of the microstructure of the sheets showed that the grain size after seven passes was about 235 nm and revealed the presence of Fe-CrMn-Si particles in the samples. The deformation of Fe-Cr-Mn-Si particles and sheet thickness affects the ductility when the sheet thickness is less than 0.4 mm, and the strength when the thickness is less than 0.2 mm.

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“…[59][60][61][62][63][64][65][66][67][68][69][70] Optimal CR reduction and subsequent annealing conditions result in ultrafine grains in CP Al with both high strength and high ductility. [59] Cryorolled Al sheets can reach a tensile strength that is 30% higher compared to Al sheets SR-processed at room temperature. [60] Under optimal processing conditions, suppression of dynamic recovery during cryogenic deformation results in high defect density, which in turn results in increased nucleation sites during annealing, and leads to finer grains.…”

Section: Fig 5 Cryorollingmentioning

confidence: 99%

Special Rolling Techniques for Improvement of Mechanical Properties of Ultrafine‐Grained Metal Sheets: a Review

Lü

Tieu

et al. 2015

Adv Eng Mater

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Interest in ultrafine-grained (UFG) materials has grown rapidly in past 20 years. This review focuses on the application of special rolling techniques for improvement of the mechanical properties of UFG metal sheets. These techniques include asymmetric rolling, cryorolling, asymmetric cryorolling, cross-accumulative roll bonding, and skin-pass rolling. The techniques also include a combination of processes such as equal channel angular press and subsequent rolling, combined high-pressure torsion and subsequent rolling, as well as combined accumulative roll bonding and subsequent asymmetric rolling. We also discuss the main mechanisms leading to improvement in the ductility of UFG materials related to the special rolling techniques. properties of ultrafine-grained (UFG) metal sheets. These techniques include asymmetric rolling, cryorolling, asymmetric cryorolling, cross-accumulative roll bonding and skin-pass rolling. The techniques also include a combination of processes such as equal channel angular press and subsequent rolling, combined high pressure torsion and subsequent rolling, as well as combined accumulative roll bonding and subsequent asymmetric rolling. We also discuss the main mechanisms leading to improvement in the ductility of UFG materials related to the special rolling techniques.

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Effect of cryo-rolling and annealing on microstructure and properties of commercially pure aluminium

Cited by 198 publications

References 15 publications

Synergetic strengthening far beyond rule of mixtures in gradient structured aluminum rod

Synergetic strengthening far beyond rule of mixtures in gradient structured aluminum rod

Mechanical properties of Al–Mg–Si alloy sheets produced using asymmetric cryorolling and ageing treatment

Special Rolling Techniques for Improvement of Mechanical Properties of Ultrafine‐Grained Metal Sheets: a Review

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