Experimental and Numerical Studies on the Formability of Materials in Hot Stamping and Cold Die Quenching Processes

Li, N.; Mohamed, Mohamed S.; Cai, Jingqi; Lin, Jianguo; Balint, D.; Dean, Trevor

doi:10.1063/1.3589738

Cited by 17 publications

(8 citation statements)

References 9 publications

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“…To model hardening, Mohamed et al (2012) developed a constitutive model based on the dislocation density evolution in AA6082 alloy during hot stamping; Cai (2011), Li et al (2011), and Zhou et al (2013 adoptd 5 a similar model to that of Mohamed to predict the hardening law of boron steel. In the dislocation density evolution, the softening effect of recovery leading to reducing of dislocation density was considered.…”

Section: Introductionmentioning

confidence: 99%

“…The model considering temperature and strain rate had a great effect on numerical modeling and the formulation of process plans for hot sheet stamping (Li et al, 2012). Li et al (2011) employed a damage evolution model for boron steel and Al alloy based on continuum damage mechanics and simulated the formability of different metal during hot stamping.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of boron steel at hot stamping conditions

Sun

Guo

et al. 2016

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental investigation of boron steel at hot stamping conditions

Sun

Guo

et al. 2016

Journal of Materials Processing Technology

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“…However, it is difficult to form complex shaped parts at cold forming conditions using high-strength aluminium alloys due to their poor formability and excessive springback, which limits their application. These issues could be overcome by warm and hot stamping processes [2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Springback analysis of AA5754 after hot stamping: experiments and FE modelling

Wang

Zhong

Fakir

et al. 2016

Int J Adv Manuf Technol

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In this paper, the springback of the aluminium alloy AA5754 under hot stamping conditions was characterised under stretch and pure bending conditions. It was found that elevated temperature stamping was beneficial for springback reduction, particularly when using hot dies. Using cold dies, the flange springback angle decreased by 9.7 % when the blank temperature was increased from 20 to 450°C, compared to the 44.1 % springback reduction when hot dies were used. Various other forming conditions were also tested, the results of which were used to verify finite element (FE) simulations of the processes in order to consolidate the knowledge of springback. By analysing the tangential stress distributions along the formed part in the FE models, it was found that the springback angle is a linear function of the average through-thickness stress gradient, regardless of the forming conditions used.

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“…Accordingly, by using this technique, due to the high-temperature forming, a better formability and extremely low springback were obtained compared to that formed at room temperature [8][9][10][11]. In addition, the integrated cooling during the forming operation enables high cooling rates and the creation of a supersaturated solid solution (SSSS) after solutionizing, which is needed to generate precipitate nucleation during aging treatment in the case of precipitation-hardenable aluminum alloys [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical Processing

Scharifi

Shoshmina

Biegler

et al. 2021

Metals

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The aim of this work was to investigate the effect of hot deformation on the aging behavior of precipitation-hardenable aluminum alloy AA7075 within a novel thermo-mechanical forming process, in order to gain insight into its precipitation kinetics. For this purpose, the material was formed at 420 °C after undergoing solution treatment to different strain levels ranging from 2% to 10% to obtain different dislocation densities. After undergoing hot deformation, aging at 120 °C with different parameters was carried out to improve the material hardness. The resulting material properties and microstructure evolution were characterized afterward using hardness measurements and a transmission electron microscope (TEM). TEM investigations revealed the formation of very fine particles for the material formed at 2%, as well as at 10%, of formed material, which act as effective barriers to dislocation motion. It was found that the response of artificial aging on the deformation degree in hot forming was less than expected due to the thermally activated mechanisms, leading to a decrease in dislocation density. Therefore, a dramatic increase in material hardness with the increase in hot deformation was not observed.

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Experimental and Numerical Studies on the Formability of Materials in Hot Stamping and Cold Die Quenching Processes

Cited by 17 publications

References 9 publications

Experimental investigation of boron steel at hot stamping conditions

Experimental investigation of boron steel at hot stamping conditions

Springback analysis of AA5754 after hot stamping: experiments and FE modelling

Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical Processing

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