Research on Synchronized Cooling Hot Forming Process of 6016 Aluminum Alloy

2012 ◽  
Vol 452-453 ◽  
pp. 81-85
Author(s):  
M.H. Chen ◽  
Y.Y. Cao ◽  
W. Chen ◽  
G.L. Chen
Keyword(s):  
Aluminum Alloy ◽  
Hot Forming ◽  
Forming Process ◽  
6016 Aluminum Alloy

Research on Synchronized Cooling Hot Forming Process of 6016 Aluminum Alloy

2012 ◽  
Vol 452-453 ◽  
pp. 81-85 ◽  
Author(s):  
Ming He Chen ◽  
Y.Y. Cao ◽  
W. Chen ◽  
Guo Liang Chen
Keyword(s):  
Aluminum Alloy ◽  
Process Parameters ◽  
High Strength ◽  
Strengthening Mechanism ◽  
Alloy Sheet ◽  
Hot Forming ◽  
Al Alloy ◽  
Forming Process ◽  
Process Step ◽  
6016 Aluminum Alloy

In order to improve formability of high strength Al-alloy sheet metal, in this paper, it come up with the synchronized cooling hot forming process. Taking the aluminum alloy of 6016 H18 aluminum alloy, which carried out its technology test by Gleeble3500 hot-mechanical simulator. The process parameters such as deformation temperature T, holding time t and cooling rate v is investigated by the orthogonal test and the microstructure is analyzed simultaneously. The results show that the synchronized cooling hot forming process can be applied to 6016 H18 aluminum alloy, it both improves the formability of 6016 H18 aluminum alloy significantly and obtains the high strength after forming, it can meet the purpose of implementing deformation and enhanced in one process step, the proper combination of process parameters are T=450 °C, t=210 s, v=60 °C/s. Strengthening mechanism is which there is a large number of strengthening phase precipitated from matrix in technology process, the strengthening phases are coarser and the dispersed uniformity is a bit worse compared with that of T4 state.

Annealing Effect for Cold Rolling 6016 Aluminum Alloy Sheet

2016 ◽  
Vol 723 ◽  
pp. 37-43
Author(s):  
Jiu Hui Li ◽  
Dong Ye He ◽  
Xuan Tao Zheng ◽  
Gao Liang Ding
Keyword(s):  
Aluminum Alloy ◽  
Cold Rolling ◽  
Tensile Test ◽  
Annealing Treatment ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Forming Process ◽  
Metal Forming Process ◽  
6016 Aluminum Alloy ◽  
Cylindrical Cup

In aluminum alloy sheet metal forming process, annealing treatment can improve the mechanical properties. The tensile test for different temperatures of 400°C, 450°C, 500°C, 550°C respectively have been carried out from 1h to 12h.The result revealed that the ductility increased with the increase of annealing temperature. It is found that the annealing treatment at 500°C for 6 h can get a good property. Furthermore, the result of tensile test showed that the yield strength increased from 130MPa before cold rolling to 190MPa after annealed, and the elongation of the sheet increased to 28.6%. The result of stamping test verified that the limiting draw ratio (LDR) increased after annealing treatment from 1.15 to 1.56. The value of blank holder force for the cylindrical cup is becoming smaller after the annealing treatment. The microstructure investigations on experimental aluminum alloys after long-time annealing and cold rolling conditions were presented. The changes of the main structural contituents have been obviously observed, which improved the formability of the alloys.

Constitutive Relationship and Parameters Optimization of 6181 H18 Aluminum Alloy Hot Forming Process with Synchronous Cooling

2013 ◽  
Vol 770 ◽  
pp. 324-328 ◽  
Author(s):  
Ning Wang ◽  
Guo Liang Chen ◽  
Ming He Chen
Keyword(s):  
Aluminum Alloy ◽  
Hot Stamping ◽  
Parameters Optimization ◽  
Constitutive Relationship ◽  
Hot Forming ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Strain Rates ◽  
Forming Process ◽  
Ultrahigh Strength Steel

Hot forming process with synchronous cooling is implied to improve the formability of lightweight materials with poor forming performance at room temperature. Its applicability for 6181 H18 aluminum alloy was investigated in this paper, inspired by ultrahigh strength steel hot stamping method. Uniaxial tensile test at elevated temperature with various strain rates were carried out to obtain the constitutive model for simulation and determine the parameters for further orthogonal test. The influence of temperature, holding time and cooling rate on formability and mechanical properties in the hot forming process with synchronous cooling was discussed. An optimized combination of process parameters was obtained which increased its tensile strength and elongation remarkably.

scholarly journals A Physical-Based Plane Stress Constitutive Model for High Strength AA7075 under Hot Forming Conditions

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 314
Author(s):  
Fulong Chen ◽  
Haitao Qu ◽  
Wei Wu ◽  
Jing-Hua Zheng ◽  
Shuguang Qu ◽  
...  
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Plane Stress ◽  
Metal Forming ◽  
Electron Backscatter Diffraction ◽  
High Strength ◽  
Material Model ◽  
Hot Forming ◽  
Industrial Processing ◽  
Average Grain Size

Physicallybased constitutive equations are increasingly used for finite element simulations of metal forming processes due to the robust capability of modelling of underlying microstructure evolutions. However, one of thelimitations of current models is the lack of practical validation using real microstructure data due to the difficulties in achieving statistically meaningful data at a sufficiently large microstructure scale. Particularly, dislocation density and grain size governing the hardening in sheet deformation are of vital importance and need to be precisely quantified. In this paper, a set of dislocation mechanics-based plane stress material model is constructed for hot forming aluminum alloy. This material model is applied to high strength 7075 aluminum alloy for the prediction of the flow behaviorsconditioned at 300–400 °C with various strain rates. Additionally, an electron backscatter diffraction (EBSD) technique was applied to examine the average grain size and geometrical necessary dislocation (GND) density evolutions, enabling both macro- and micro- characteristics to be successfully predicted. In addition, to simulate the experienced plane stress states in sheet metal forming, the calibrated model is further extended to a plane stress stateto accuratelypredict the forming limits under hot conditions.The comprehensively calibrated material model could be used for guidinga better selection of industrial processing parameters and designing process windows, taking into account both the formed shape as well as post formed microstructure and, hence, properties.

scholarly journals Deformation Characteristics and Microstructure Analysis of Aluminum Alloy Component with Complex Shape by Cold Orbital Forming

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 808
Author(s):  
Wei Feng ◽  
Chaoyi Jin ◽  
Jiadong Deng ◽  
Wuhao Zhuang
Keyword(s):  
Aluminum Alloy ◽  
Complex Shape ◽  
Fe Simulation ◽  
Effective Strain ◽  
Electron Back Scatter Diffraction ◽  
Main Body ◽  
Deformation Characteristics ◽  
Alloy Component ◽  
Forming Process ◽  
Orbital Forming

This work aimed to study the deformation characteristics and microstructure of AA6063 aluminum alloy component with complex shape manufactured by cold orbital forming processing. The material flowing behavior was analyzed by Finite Element (FE) simulation and forming experiments were carried out using bar blank with different lengths. The microstructure of the boss zone cut from the formed samples was observed using scanning electron microscopy (SEM) and electron back-scatter diffraction (EBSD). FE simulation and experiment results both showed the aluminum base can be formed using cold orbital forming process. The distributions of the effective strain of the component with different blank lengths were almost the same, and the effective strain was bigger at the boss and the flash as the forming finished. The material flow is complex, especially in the boss, and the folding defect was observed at the root of the boss. The distribution of Mg2Si strengthening precipitate is more homogeneous in the matrix, has a different shape, and shows directivity at different position of boss zone. The grains are elongated, and the extent is different at different positions of the boss zone after cold orbital forming, and the crystal orientation discrepancy is smaller in the component main body and bigger in the boss zone. Subsequent forming process and blank optimization need to be further researched to improve forming quality.

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