Effects of TVSR process on the dimensional stability and residual stress of 7075 aluminum alloy parts

Xu, Yewei; Shi, Zhongjun; Li, Bianhong; Zhang, Zhang

doi:10.1515/rams-2021-0048

Cited by 8 publications

(5 citation statements)

References 38 publications

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“…With the increasing demand for cold-rolled wide and thin strip steel, the quality requirements for flatness have improved 1 . The roll straightening process plays a key role in improving the quality and efficiency of cold-rolled wide and thin strip steel; this process can reduce the flatness defects and large residual stress of cold-rolled wide and thin strip steel and reduce the generation of defects and waste resources in subsequent processing and use processes 2 – 4 .…”

Section: Introductionmentioning

confidence: 99%

Calculation method and analysis of residual stress in the strip bending roller straightening process

Zhu,

Wang,

2024

Sci Rep

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Taking thin gauge strip as an example, the deformation process of metal strip in bending roll straightening was studied. Based on the theory of discrete, curvature integral and elastic–plastic mechanics, the strip travel trajectory of the bending roll straightening process is analyzed, and the numerical analytical calculation method of the continuous straightening process of the strip bending roll is established. The results are verified by establishing MARC finite element simulation and designing straightening experiment. The effects of yield strength, plastic rate and bending amount on residual stress after straightening were studied. In the straightening process, with the increase of the amount of bending roll, the residual strain converges to the region Γ, and with the increase of the yield strength, the region Γ decreases. With the increase of the yield strength, the amount of bending roll and the plastic rate, the wave height increases. The results of the calculation of residual stress, finite element simulation and experiment are close and the trend is consistent. The results show that the logic of the calculation method is reasonable, and the prediction error is within the scope of engineering application, which is helpful to the realization of process intelligence in the process of bending roller straightening.

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Section: Introductionmentioning

confidence: 99%

Calculation method and analysis of residual stress in the strip bending roller straightening process

Zhu,

Wang,

2024

Sci Rep

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“…With the increasing demand for cold-rolled wide and thin strip steel, the quality requirements for flatness have improved [1]. The roll straightening process plays a key role in improving the quality and efficiency of cold-rolled wide and thin strip steel; this process can reduce the flatness defects and large residual stress of cold-rolled wide and thin strip steel and reduce the generation of defects and waste resources in subsequent processing and use processes [2][3][4]. In the metal plate and strip production process, residual stress has been an important factor in restricting the development of plates and strips to thin and wide specification products and is also the main cause of various defects in plates and strips.…”

Section: Introductionmentioning

confidence: 99%

Calculation method and analysis of residual stress in the strip bending roller straightening process

ZHU,

WANG,

2024

Preprint

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The residual stresses in the roll straightening process of curved rolls of metal plates and strips are investigated by taking thin specification plates and strips as examples. Using the curvature integral and elastic‒plastic mechanics theory, the trajectory of the strip in the bending roll straightening process is analyzed, and a numerical analytical calculation method for the continuous straightening process of the strip in the bending roll is established. The results are verified by establishing an MARC finite element simulation. The effects of yield strength, plasticity rate and bending roll amount on the residual strain (stress) after straightening are investigated. In the straightening process, with increasing bending roll, the residual strain converges in the region Γ, the region Γ decreases with increasing yield strength, and the height of the wave increases with increasing yield strength, bending roll and plasticity rate. In addition, experiments were designed for verification. The results show that the logic of this calculation method is reasonable, the prediction error is within the scope of engineering application, and the method meets the intelligent needs of the bending roller straightening process.

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“…In the manufacturing process, the thermal gradients or uneven deformation of workpiece will lead to the generation of residual stress, which will cause unwanted distortion and deteriorate dimensional accuracy. [1][2][3][4] As an important form of material processing, rolling is also troubled by residual stress. [5][6][7] For the hot rolling of strip, the flatness problem will come out when the internal residual stress exceeds the critical value.…”

Section: Introductionmentioning

confidence: 99%

Effect of Uneven Distribution of Material Property on Buckling Behavior of Strip during Hot Finishing Rolling

Liu

et al. 2023

ISIJ Int.

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Unlike traditional austenitic rolling, there is phase transformation during hot finishing rolling for thin gauge and high strength steel or non-oriented electrical steel. The transverse differences of temperature and asynchronous phase transformation result in uneven distribution of material property of rolled strip, further change the buckling behavior of strip during hot finishing rolling. By replacing the elastic modulus constant in the traditional buckling model with the distribution function of tangent modulus obtained by multiphase compression experiments and multifield coupling simulation, the effect of uneven distribution of material property on the critical buckling stress and buckling wave length are analyzed. The results show that for the global longitudinal wave, the critical buckling stress at the exit of stand is greater than that at the entry. But the opposite is true for the local longitudinal wave. Under the effect of uneven distribution of material property, the critical buckling stress and buckling wavelength of global and local center waves change little. The critical buckling stress of global edge wave is almost unchanged, but the buckling wavelength decreases slightly. The critical buckling stress and buckling wavelength of local edge wave are reduced obviously, and the buckling wavelength is decreased by about 10%. It means that the existence of soft ferrite at the strip edge easily makes the wave mode develop to "fragmented edge wave", which is consistent with the actual phenomenon.

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Effects of TVSR process on the dimensional stability and residual stress of 7075 aluminum alloy parts

Cited by 8 publications

References 38 publications

Calculation method and analysis of residual stress in the strip bending roller straightening process

Calculation method and analysis of residual stress in the strip bending roller straightening process

Calculation method and analysis of residual stress in the strip bending roller straightening process

Effect of Uneven Distribution of Material Property on Buckling Behavior of Strip during Hot Finishing Rolling

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