Forming and Warm Die Quenching Process for AA7075 Aluminum Alloy and Its Application

Zhang, Zhiqiang; Zhang, Xiaokai; He, Dongye

doi:10.1007/s11665-019-04545-7

“…The true stress-strain curves of aluminum alloy 7075 are input into the FE simulation software. The true stress-strain curves below 300 °C reported by Zhang et al [29] are used in the FE simulation. The intact formed parts after stamping are shown in Fig.…”

Section: Materials and Experimental Testing 31 Materialsmentioning

confidence: 99%

Springback prediction of 7075 aluminum alloy V-shaped parts in cold and hot stamping

Zhou

¹

,

Yang

²

,

Wang

³

et al. 2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

In this paper, the springback behavior of high strength aluminum alloy 7075 is studied by experiments and finite element (FE) simulation. Firstly, an analytical model is established to predict the springback angles and analyze the springback trend. The springback experimental tests are conducted by using the V-shaped stamping dies. The influence of deformation temperature, punch radius and blank holder force on the springback angles are studied. Finally, An FE simulation model is performed to investigate the deformation characteristics and springback process of the aluminum alloy sheet. The results show that the change of springback angles is direct proportional to the punch radius. The springback angles increase with the decreasing deformation temperature and the increasing blank holder force. The stress relaxation that occurs during the die holding stage is the primary reason of reducing the springback compared with cold stamping. Low blank holder force will cause side wall curl, which results in the deviation of forming size. The FE simulation model considering stress relaxation is capable of precisely predicting the change of springback angles, and the simulation results exhibit good consistency with the experimental results.

show abstract

“…The true stress-strain curves of aluminum alloy 7075 are input into the FE simulation software. The true stress-strain curves below 300 °C reported by Zhang et al [29] are used in the FE simulation. The intact formed parts after stamping are shown in Fig.7.…”

Section: Materials and Experimental Testing 31 Materialsmentioning

confidence: 99%

Springback Prediction of 7075 Aluminum Alloy V-shaped Parts in Cold and Hot Stamping

Zhou

¹

,

Yang

²

,

Wang

³

et al. 2021

Preprint

1

0

View full text Add to dashboard Cite

In this paper, the springback behavior of high strength aluminum alloy 7075 is studied by experiments and finite element (FE) simulation. Firstly, an analytical model is established to predict the springback angles and analyze the springback trend. The springback experimental tests are conducted by using the V-shaped stamping dies. The influence of deformation temperature, punch radius and blank holder force on the springback angles are studied. Finally, An FE simulation model is performed to investigate the deformation characteristics and springback process of the aluminum alloy sheet. The results show that the change of springback angles is direct proportional to the punch radius. The springback angles increase with the decreasing deformation temperature and the increasing blank holder force. The stress relaxation that occurs during the die holding stage is the primary reason of reducing the springback compared with cold stamping. Low blank holder force will cause side wall curl, which results in the deviation of forming size. The FE simulation model considering stress relaxation is capable of precisely predicting the change of springback angles, and the simulation results exhibit good consistency with the experimental results.

show abstract

“…Highstrength aluminum alloys offer the advantages of low density and high strength [1,2] and are widely used in the aerospace industry. However, poor plasticity of high-strength aluminum alloys at room temperature limits their application [3,4].…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior and Properties of 7075 Aluminum Alloy under Electromagnetic Hot Forming

Du

¹

,

Deng

²

,

Liu

³

et al. 2021

View full text Add to dashboard Cite

High-strength 7075 aluminum alloy is widely used in the aerospace industry. The forming performance of 7075 aluminum alloy is poor at room temperature. Therefore, hot forming is mainly adopted. Electromagnetic forming is a high-speed forming technology that can significantly improve the forming limit of difficult-to-deform materials. However, there are few studies on electromagnetic hot forming of 7075-T6 aluminum alloy. In this study, the deformation behavior of 7075-T6 aluminum alloy in the temperature range of 25 °C to 400 °C was investigated. As the temperature increased, the sheet forming height first decreased, then increased. When the forming temperature is between 200 °C and 300 °C, η phase coarsening leads to a decrease in stress and hardness of the material. When the forming temperature is between 300 °C and 400 °C, continuous dynamic recrystallization of 7075 aluminum alloy occurs, resulting in grain refinement and an increase in stress and hardness. The results of numerical simulations and experiments all show that the forming height and deformation uniformity of the sheet metal are optimal at 400 °C, compared to 200 °C.

show abstract

Forming and Warm Die Quenching Process for AA7075 Aluminum Alloy and Its Application

Cited by 13 publications

References 24 publications

Springback prediction of 7075 aluminum alloy V-shaped parts in cold and hot stamping

Springback prediction of 7075 aluminum alloy V-shaped parts in cold and hot stamping

Springback Prediction of 7075 Aluminum Alloy V-shaped Parts in Cold and Hot Stamping

Deformation Behavior and Properties of 7075 Aluminum Alloy under Electromagnetic Hot Forming

Contact Info

Product

Resources

About