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.

A Constitutive Model of 6111-T4 Aluminum Alloy Sheet Based on the Warm Tensile Test

2013 ◽  
Vol 23 (3) ◽  
pp. 1107-1113 ◽  
Author(s):  
Lin Hua ◽  
Fanzhi Meng ◽  
Yanli Song ◽  
Jianing Liu ◽  
Xunpeng Qin ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Constitutive Model ◽  
Tensile Test ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet

Forming of Small Projection on Roll-Cast A356 Strip by Cold Rolling and Small Groove on PET Plate Using A356 Die

2019 ◽  
Vol 805 ◽  
pp. 37-42
Author(s):  
Toshio Haga ◽  
Yhuta Nakazawa
Keyword(s):  
Aluminum Alloy ◽  
Cold Rolling ◽  
Polyethylene Terephthalate ◽  
Alloy Sheet ◽  
Rolling Speed ◽  
A356 Aluminum Alloy ◽  
Aluminum Alloy Sheet ◽  
A356 Aluminum ◽  
Twin Roll Cast ◽  
Twin Roll

A small projection with a height and width of about 40 and 50 µm, respectively, was formed on a twin-roll-cast A356 aluminum alloy sheet by cold rolling at a rolling speed of 0.5 m/min. This projection was then used as a die to form a groove with a depth and width of about 40 and 50 µm, respectively, on a polyethylene terephthalate plate by pressing.

Springback analysis of 6016 aluminum alloy sheet in hot V-shape stamping

2019 ◽  
Vol 26 (3) ◽  
pp. 524-535 ◽  
Author(s):  
Wei-ping Ma ◽  
Bao-yu Wang ◽  
Wen-chao Xiao ◽  
Xiao-ming Yang ◽  
Yi Kang
Keyword(s):  
Aluminum Alloy ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
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.

scholarly journals Aluminum Alloy Sheet-Forming Limit Curve Prediction Based on Original Measured Stress–Strain Data and Its Application in Stretch-Forming Process

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1129 ◽  
Author(s):  
Lirong Sun ◽  
Zhongyi Cai ◽  
Dongye He ◽  
Li Li
Keyword(s):  
Aluminum Alloy ◽  
Alloy Sheet ◽  
Forming Limit ◽  
Aluminum Alloy Sheet ◽  
Limit Curve ◽  
Forming Process ◽  
Forming Limit Curve ◽  
Stress Strain ◽  
Strain Relation ◽  
Stress Strain Relation

A new method, by directly utilizing original measured data (OMD) of the stress–strain relation in the Marciniak–Kuczynski (M–K) model, was proposed to predict the forming limit curve (FLC) of an aluminum alloy sheet. In the groove zone of the M–K model, by establishing the relations of the equivalent strain increment, the ratio of shear stress to the first principle stress and the ratio of the second principle stress to the first principle stress, the iterative formula was established and solved. The equations of theoretical forming limits were derived in detail by using the OMD of the stress–strain relation. The stretching specimens of aluminum alloy 6016-T4 were tested and the true stress–strain curve of the material was obtained. Based on the numerical simulations of punch-stretch tests, the optimized specimens’ shape and test scheme were determined, and the tests for FLC were carried out. The FLC predicted by the proposed method was more consistent with the experimental results of FLC by comparing the theoretical FLCs based on OMD of the stress–strain relation and of that based on traditional power function. In addition, the influences of anisotropic parameter and groove angle on FLCs were analyzed. Finally, the FLC calculated by the proposed method was applied to analyze sheet formability in the stretch-forming process, and the predicted results of FLC were verified by numerical simulations and experiments. The fracture tendency of the formed parts can be visualized in the forming limit diagram (FLD), which has certain guiding significance for fracture judgment in the sheet-forming process.

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