Microstructure and mechanical properties of ultra-fine grains (UFGs) aluminum strips produced by ARB process

Eizadjou, Mehdi; Manesh, H. Danesh; Janghorban, K.

doi:10.1016/j.jallcom.2008.06.161

Cited by 206 publications

(86 citation statements)

References 36 publications

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“…Similar to the observations of heavily deformed materials produced by other deformation techniques [3][4][5][6], it has been found that the average boundary spacing in ARB-processed materials decreases with increasing strain, whereas the fraction of high angle boundaries (HABs) increases [7][8][9][10].…”

Section: Introductionsupporting

confidence: 75%

Analysis of through-thickness heterogeneities of microstructure and texture in nickel after accumulative roll bonding

2013

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Section: Introductionsupporting

confidence: 75%

Analysis of through-thickness heterogeneities of microstructure and texture in nickel after accumulative roll bonding

2013

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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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“…The high strength and low ductility in tensile tests are the typical behaviour of UFG materials. Most of the reported UFG materials are typically several times stronger than their coarse grained counterparts which should be attributed to strain hardening (dislocation strengthening) and grain refinement hardening (grain boundary strengthening) [24]. However, at the same time, the elongation to failure is no more than a few percent [30,31].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Investigation of ultrafine grained AA1050 fabricated by accumulative roll bonding

Lü

et al. 2014

Materials Science and Engineering: A

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Accumulative roll bonding (ARB) is an effective method to produce ultrafine-grained (UFG) sheet materials with high strength. In this work, fully annealed AA1050 sheet with an initial thickness of 1.5. mm was processed by ARB up to five cycles. The microstructure was examined by optical microscopy (OM) and transmission electron microscopy (TEM). The results revealed that ARB is a promising process for fabricating ultrafine grained structures in aluminium sheets and the average grain size after 5-cycle ARB reached approximately 300. nm. Meanwhile, a remarkable enhancement in the strength was achieved and the value was about three times the strength of starting material. The microstructure at the bond interface introduced during ARB was investigated and its influence was discussed in detail. In addition, the microstructure and mechanical properties after ARB were compared with that after deformation by equal channel angular pressing (ECAP) up to the same strain. It has been found that ARB is more efficient in grain refinement and strengthening, which can be attributed to the different deformation modes of the two techniques. Accumulative roll bonding (ARB) is an effective method to produce ultrafine-grained (UFG) sheet materials with high strength. In this work, fully annealed AA1050 sheet with an initial thickness of 1.5 mm was processed by ARB up to five cycles. The microstructure was examined by optical microscopy (OM) and transmission electron microscopy (TEM). The results revealed that ARB is a promising process for fabricating ultrafine grained structures in aluminium sheets and the average grain size after 5-cycle ARB reached approximately 300 nm. Meanwhile, a remarkable enhancement in the strength was achieved and the value was about three times the strength of starting material. The microstructure at the bond interface introduced during ARB was investigated and its influence was discussed in detail. In addition, the microstructure and mechanical properties after ARB were compared with that after deformation by equal channel angular pressing (ECAP) up to the same strain. It has been found that ARB is more efficient in grain refinement and strengthening, which can be attributed to the different deformation modes of the two techniques.

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Microstructure and mechanical properties of ultra-fine grains (UFGs) aluminum strips produced by ARB process

Cited by 206 publications

References 36 publications

Analysis of through-thickness heterogeneities of microstructure and texture in nickel after accumulative roll bonding

Analysis of through-thickness heterogeneities of microstructure and texture in nickel after accumulative roll bonding

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

Investigation of ultrafine grained AA1050 fabricated by accumulative roll bonding

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