Microstructure, texture and mechanical properties of 5A02 aluminum alloy tubes under electromagnetic bulging

Jiang, Huawen; Li, Ning; Zhu, Xu; Fan, Zhisong; Yu, Haiping; Liu, Lin

doi:10.1016/j.matdes.2015.05.047

Cited by 21 publications

(2 citation statements)

References 31 publications

(45 reference statements)

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“…The results can be attributed to the accumulation of higher dislocation density and fragmentation of grains caused by the induced strain. As dynamic recovery was suppressed during cryorolling, the accumulated dislocation density tends to rearrange themselves and form cells structure [33], in turn cell substructures can weaken texture [34]. Therefore, mechanical properties would be improved due to low anisotropy in material.…”

Section: Texture Evolution After Rollingmentioning

confidence: 99%

Effect of cryorolling on microstructure and mechanical properties of a peak-aged AA6082 extrusion

Liu

Jia

et al. 2017

Journal of Alloys and Compounds

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Peak-aged AA6082 flat extrusions were cryorolled at liquid nitrogen temperature to three different thickness reductions, the reductions were 21%, 42% and 85%, respectively.For comparison, an identical extrusion was rolled at room temperature to a reduction of 85%.The microstructure and plastic deformation behaviors of the initial as well as the rolled materials were studied by means of electron microscopy and tensile tests at room temperature.The initial material showed fibrous grain structure. After cryorolling to 21% thickness reduction, grains in the alloy were further elongated. In addition, microbands were detected in some grains, while other grains were microband-free. More detailed information was obtained in the sample after 42% thickness reduction. Here, numerous microbands aligned along slip planes with the highest resolved shear stress, leading to the formation of new low angle subgrains and high angle grains. In the case of microband-free grains, multiple slip systems were activated concurrently due to similar and low Schmid factors, hence producing homogeneous deformation within these grains. A cryorolling strain of 85% produced a hierarchical microstructure in the materials volume, consisting of nano-and ultrafine grains with size < 100 nm coexisted with micro-sized grains. The development of hierarchical 2 microstructure could be considered as a consequence of the intersection between families of microbands. As a result, both the strength and uniform elongation of the severely cryorolled alloy, i.e. 85% thickness reduction, are more superior to rest of rolled alloys. Therefore, this study revealed that a simple processing procedure, i.e., cryorolling, can be utilized to tailor for desired properties in favor of both strength and ductility aluminum alloy.

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Section: Texture Evolution After Rollingmentioning

confidence: 99%

Effect of cryorolling on microstructure and mechanical properties of a peak-aged AA6082 extrusion

Liu

Jia

et al. 2017

Journal of Alloys and Compounds

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“…In our recent research 14 , we systematically investigated microstructure, texture and mechanical properties of annealed 5052 aluminum alloy tubes after EMF. The interesting finding is that the EMF induces a significant increase in yield strength and fracture strength but decrease in fractural elongation due to the strain hardening effect resulting from the increase in dislocation density and the formation of high density dislocation bands.…”

mentioning

confidence: 99%

Low temperature deformation behavior of an electromagnetically bulged 5052 aluminum alloy

Wang

et al. 2016

Sci Rep

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The fundamental understanding of the deformation behavior of electromagnetically formed metallic components under extreme conditions is important. Here, the effect of low temperature on the deformation behavior of an electromagnetically-bulged 5052 aluminum alloy was investigated through uniaxial tension. We found that the Portevin-Le Chatelier Effect, designated by the serrated characteristic in stress-strain curves, continuously decays until completely disappears with decreasing temperature. The physical origin of the phenomenon is rationalized on the basis of the theoretical analysis and the Monte Carlo simulation, which reveal an increasing resistance to dislocation motion imposed by lowering temperature. The dislocations are captured completely by solute atoms at −50 °C, which results in the extinction of Portevin-Le Chatelier. The detailed mechanism responsible for this process is further examined through Monte Carlo simulation.

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Effects of process parameters on electromagnetic sheet free forming of aluminium alloy

Huang

et al. 2018

Int J Adv Manuf Technol

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Microstructure, texture and mechanical properties of 5A02 aluminum alloy tubes under electromagnetic bulging

Cited by 21 publications

References 31 publications

Effect of cryorolling on microstructure and mechanical properties of a peak-aged AA6082 extrusion

Effect of cryorolling on microstructure and mechanical properties of a peak-aged AA6082 extrusion

Low temperature deformation behavior of an electromagnetically bulged 5052 aluminum alloy

Effects of process parameters on electromagnetic sheet free forming of aluminium alloy

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