The Simulation and Measurement of the Residual Deformation of Welding of 2024 Aluminum Alloy Sheet

Applied laser ◽  
2011 ◽  
Vol 31 (5) ◽  
pp. 361-368
Author(s):  
张凤英 Zhang Fengying ◽  
谭华 Tan Hua ◽  
陈静 Chen Jing ◽  
邓娟莉 Deng Juanli
Keyword(s):  
Aluminum Alloy ◽  
Residual Deformation ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
2024 Aluminum Alloy

Microstructure and Texture Evolution of 2024 Aluminum Alloy Sheet under Different Loading Conditions

2018 ◽  
Vol 920 ◽  
pp. 236-243
Author(s):  
Peng Zhou ◽  
Lei Deng ◽  
Xin Yun Wang
Keyword(s):  
Aluminum Alloy ◽  
Strain Rate ◽  
Tensile Deformation ◽  
Texture Evolution ◽  
Deformation Texture ◽  
Alloy Sheet ◽  
Loading Conditions ◽  
Aluminum Alloy Sheet ◽  
2024 Aluminum Alloy ◽  
Goss Texture

To study microstructure and texture evolution of 2024 aluminum alloy sheet under different loading conditions, thermal tensile and compression experiments of 2024 aluminum alloy rolled sheets were carried out at temperatures ranging from 300 °C to 450 °C and under strain rates ranging from 0.001 s-1 to 0.1 s-1. During tensile deformation, the HABs of original grains are directly elongated until abruption. DRX process occurs during compression. Dislocations appear during deformation, migrate and accumulate into LABs, and then rotate into HABs to form new grain.The three-dimensional orientation distribution functions (ODFs) in different stress states were measured, with related texture types and distribution laws compared. According to ODFs with a constant φ2, the deformation texture of {011} <100>Goss texture is gradually strengthened during thermal tension at high temperature and low strain rate (450°C/0.001s-1). The deformation texture of {011} <100>Goss texture is weakened with the strain increasing. Furthermore, the increase of deformation temperature or the decrease of strain rate slows down the weakening process of {011} <100> Goss texture, which is attributed to the recrystallization behavior during tensile deformation. Besides, since the recrystallization process proceeds more completely during hot compression, it produces a quasi-random texture.

EXPERIMENTAL RESEARCH ON LASER SHOCK WAVE LOADING MECHANISM OF 2024 ALUMINUM ALLOY SHEET

2013 ◽  
Vol 48 (2) ◽  
pp. 205-210
Author(s):  
Aixin FENG ◽  
Guifeng NIE ◽  
Wei XUE ◽  
Yupeng CAO ◽  
Xiaoxiang XU ◽  
...  
Keyword(s):  
Shock Wave ◽  
Aluminum Alloy ◽  
Experimental Research ◽  
Alloy Sheet ◽  
Shock Wave Loading ◽  
Wave Loading ◽  
Laser Shock ◽  
Aluminum Alloy Sheet ◽  
2024 Aluminum Alloy ◽  
Laser Shock Wave

Research on Springback during Hot Stamping with Uniform and Local-Thickened Sheet Blanks

2021 ◽  
Vol 871 ◽  
pp. 73-79
Author(s):  
Jin Bo Li
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Hot Stamping ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Blank Holder Force ◽  
2024 Aluminum Alloy ◽  
Blank Holder ◽  
Corner Radius ◽  
Forming Temperature

In this study, the effect of forming temperature, blank holder force, die entrance radius, die corner radius and blank local thickening on the springback of square cups were studied, by conducting finite element simulations of the hot stamping of 2024 aluminum alloy sheet blanks. Within the range of process parameters investigated in this study, increasing the forming temperature, blank holder force and die corner radius or decreasing the die entrance radius all lead to lower values of springback in hot stamped square cups after unloading. Compared to uniform blank, local-thickened sheet blank can significantly reduce the springback in hot stamped square cup. When the side length of the square-ring-shaped convex rib of the thickened blank is equal to the punch width and the convex rib faces downward, significant reductions in the springback, of at least 55.9%, can be achieved.

scholarly journals Hot Deformation Behavior of a 2024 Aluminum Alloy Sheet and its Modeling by Fields-Backofen Model Considering Strain Rate Evolution

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 243 ◽  
Author(s):  
Zhubin He ◽  
Zhibiao Wang ◽  
Yanli Lin ◽  
Xiaobo Fan
Keyword(s):  
Aluminum Alloy ◽  
Strain Rate ◽  
Deformation Behavior ◽  
Strain Distribution ◽  
Tensile Tests ◽  
Alloy Sheet ◽  
Image Correlation ◽  
Aluminum Alloy Sheet ◽  
2024 Aluminum Alloy ◽  
Local Flow

The deformation behavior of a 2024 aluminum alloy sheet at elevated temperatures was studied by uniaxial hot tensile tests over the nominal initial strain rate range of 0.001–0.1 s−1 and temperature range of 375–450 °C. In order to analyze the deformation behavior with higher accuracy, a digital image correlation (DIC) system was applied to determine the strain distribution during hot tensile tests. Local stress-strain curves for different local points on the specimens were calculated. The strain rate evolution of each point during the tensile tests was investigated under different deformation conditions. Then, an improved Fields–Backofen (FB) model, taking into account the local strain rate evolution instead of the fixed strain rate, was proposed to describe the constitutive behaviors. It has been found that obvious non-uniform strain distribution occurred when the true strain was larger than 0.3 during hot tensile tests. The strain rate distribution during deformation was also non-uniform. It showed increasing, steady, and decreasing variation tendencies for different points with the increasing of strain, which led to the local flow stress being different at different local points. The flow stresses predicted by the improved FB model showed good agreement with experimental results when the strain rate evolutions of local points during tensile tests were considered. The prediction accuracy was higher than that of traditional FB models.

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