The Experimental Research on the Formability of Stamping of Magnesium Alloy AZ31B Sheets

2007 ◽  
Vol 546-549 ◽  
pp. 275-280
Author(s):  
Ling Yun Wang ◽  
Zhi Wen Lu ◽  
Ya Zhong Zhao
Keyword(s):  
Magnesium Alloy ◽  
High Temperatures ◽  
Experimental Research ◽  
Deep Drawing ◽  
Room Temperature ◽  
Reference Data ◽  
Forming Limit ◽  
Magnesium Alloy Az31b ◽  
Basic Reference

In this paper, the basic formability of stamping of magnesium-alloy AZ31B sheet has been studied through experiments. The stamping formability of magnesium-alloy AZ31B sheet, such as the conical cup value, bending formability, deep drawing formability, formability of hole expanding, forming limit has been studied by simulating processing experiments. The formability of stamping supplies the basic reference data for the stamping processing. It is also found that the formability of stamping of magnesium-alloy AZ31B sheets is poor at room temperature and is excellent at intermediate and high temperatures.

Study on the Effect of Cl- Concentration on the Corrosion Fatigue Damage in a Rolled AZ31B Magnesium Alloy by Acoustic Emission

2007 ◽  
Vol 353-358 ◽  
pp. 327-330 ◽  
Author(s):  
Hua Mao Zhou ◽  
Jian Qiu Wang ◽  
Qi Shan Zang ◽  
En Hou Han
Keyword(s):  
Acoustic Emission ◽  
Magnesium Alloy ◽  
Energy Release ◽  
Fatigue Damage ◽  
Corrosion Fatigue ◽  
Room Temperature ◽  
Fatigue Performance ◽  
Ae Energy ◽  
Magnesium Alloy Az31b ◽  
Wrought Magnesium Alloy

The fatigue performance of one widely used wrought magnesium alloy AZ31B in rolled form was studied using acoustic emission (AE). AE energy release during corrosion fatigue (CF) testing was measured at room temperature. It is found that AE energy release can express corrosion fatigue damage experienced by the material.

FORMING LIMIT OF AZ31B MAGNESIUM ALLOY SHEET IN THE DEEP DRAWING WITH CROSS-SHAPED DIE

2008 ◽  
Vol 22 (31n32) ◽  
pp. 6045-6050 ◽  
Author(s):  
HEON YOUNG KIM ◽  
SUN CHUL CHOI ◽  
HYUNG JONG KIM ◽  
SEOK MOO HONG ◽  
YONG SEUNG SHIN ◽  
...  
Keyword(s):  
Finite Element ◽  
Magnesium Alloy ◽  
Deep Drawing ◽  
Temperature Deformation ◽  
Dome Height ◽  
Forming Limit ◽  
Process Conditions ◽  
Geometrical Parameters ◽  
Element Analysis ◽  
Az31b Magnesium Alloy

Magnesium alloy sheets are usually formed at temperatures between 150 and 300°C because of their poor formability at room temperature. In the present study, the formability of AZ31B magnesium alloy sheets was investigated by the analytical and experimental approaches. First, tensile tests and limit dome height tests were carried out at several temperatures between 25 and 300°C to get the mechanical properties and forming limit diagram (FLD). A FLD-based criterion considering the material temperature during deformation was used to predict the forming limit from a finite element analysis (FEA) of the cross-shaped cup deep drawing process. This criterion proved to be very useful in designing the geometrical parameters of the forming tools and determining optimal process conditions such as tool temperatures and blank shape by the comparison between finite element temperature-deformation analyses and physical try-out. The heating and cooling channels were also optimally designed through heat transfer analyses.

Temperature and Processability of Magnesium Alloy AZ31 on Rectangular Cup Deep Drawing

2013 ◽  
Vol 535-536 ◽  
pp. 326-329 ◽  
Author(s):  
Yasuhide Nakayama ◽  
Tetsuo Naka ◽  
Takeshi Uemori ◽  
Ichiro Shimizu
Keyword(s):  
Magnesium Alloy ◽  
Numerical Simulations ◽  
Magnesium Alloys ◽  
Deep Drawing ◽  
Room Temperature ◽  
Local Heating ◽  
Plastic Strain Rate ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Plastic Forming

The magnesium alloys, that have high specific strength, are often applied to the industrial products. However, the magnesium alloys exhibit low ductility at the room temperature on account of its hexagonal close-packed structure. It is difficult to give large deformation to the magnesium alloys at room temperature. Therefore, the plastic forming of a magnesium alloy sheet needs the process at warm temperature. In the present work, the procedure of thermal-mechanical coupled analyses are employed. The numerical simulations of warm deep drawings have been performed in order to evaluate the dependence of the temperature on the plastic forming of a magnesium alloy AZ31 sheet. The mechanical properties of the magnesium alloy AZ31 shall be described as the functions depending on temperature. The shapes of punches and die holes are rectangle whose aspect ratios are 1.5 or 2.0. The corners of punches and dies are heated locally at 473K. The influence of local heating on the formability have been investigated. The relation between the blank size and the formability has been also estimated. As the results of numerical simulations, it was shown that the formability of deep drawing was improved by local heating to the punch and the die. When the blanks of various sizes were tried, the distributions of the plastic strain rate around the die corner were changed. Therefore, the deviation of the plastic flow and the temperature distribution arose in a sheet. Consequently, it is necessary to optimize the blank sizes according to the shape of die holes in addition to the forming temperature.

Formability of Magnesium Alloy AZ31B from Room Temperature to 125 °C Under Biaxial Tension

2017 ◽  
pp. 661-667
Author(s):  
Isaac Chelladurai ◽  
Andrew Orme ◽  
Mike P. Miles ◽  
David T. Fullwood ◽  
John E. Carsley ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Room Temperature ◽  
Biaxial Tension ◽  
Magnesium Alloy Az31b

Application of Blank Optimization Method in Deep Drawing of Rectangular Magnesium Alloy Cups under Non-Isothermal Condition

2007 ◽  
Vol 344 ◽  
pp. 333-339
Author(s):  
W.T. Zheng ◽  
Donato Sorgente ◽  
G. Palumbo ◽  
Luigi Tricarico ◽  
Li Mei Ren ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Deep Drawing ◽  
Metal Forming ◽  
Room Temperature ◽  
Isothermal Condition ◽  
Optimization Methods ◽  
Optimization Method ◽  
Forming Process ◽  
Metal Forming Process ◽  
Blank Shape

Using the optimum blank in sheet metal forming process not only can decrease the material wasting but also avoid possible defects such as local severe thinning, wrinkling and fracture. Since it is practical technology for industrial production, many blank optimization methods have been proposed and their validity was verified by some forming tests of typical or complicated components. However, all the forming tests were carried out at room temperature or under isothermal condition. In present work, a blank optimization method was employed to evaluate its efficiency in deep drawing of rectangular magnesium alloy cups under non-isothermal condition. It is proved by experiment that the employed blank optimization method can predict successfully the optimum initial blank shape for the component with specified shape and dimension.

Mechanical Properties and Microstructure of AZ31 Magnesium Alloy under Uni-Axial Tensile Loading

2011 ◽  
Vol 686 ◽  
pp. 219-224 ◽  
Author(s):  
Xiao Yu Zhong ◽  
Guang Jie Huang ◽  
Fang Fang He ◽  
Qing Liu
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Magnesium Alloy ◽  
Room Temperature ◽  
Alloy Sheet ◽  
Strain Rates ◽  
Axial Tensile ◽  
Magnesium Alloy Az31b ◽  
Plastic Deformation Behavior ◽  
Electron Back Scattered Diffraction

Uni-axial tensile plastic deformation behavior of rolled magnesium alloy AZ31B under the temperature range from room temperature(RT) to 250°C with strain rates between 10-3 and 10-1s-1 has been systematically investigated. Microstructure evolution and texture were determined using optical microscopy (OM) and electron back-scattered diffraction (EBSD) techniques, respectively. Our results indicated that the strength and elongation-to-fracture were more sensitive to strain rates at elevated temperature rather than that at room temperature; dynamic recrystallization (DRX) and relaxation of stress at elevated temperature resulted in dramatic change of mechanical properties. Compared with strain rate, the temperature played a more important role in ductility of AZ31B Mg alloy sheet.

Forming Limit of Magnesium Alloy Sheet in Hydromechanical Deep Drawing

2012 ◽  
Vol 482-484 ◽  
pp. 2086-2089 ◽  
Author(s):  
Xian Chang Mao ◽  
Ming Guang Wang
Keyword(s):  
Magnesium Alloy ◽  
Internal Pressure ◽  
Deep Drawing ◽  
Alloy Sheet ◽  
Forming Limit ◽  
Az31b Magnesium Alloy ◽  
Hydromechanical Deep Drawing ◽  
Magnesium Alloy Sheet ◽  
Deformation Behaviors ◽  
Az31b Magnesium Alloy Sheet

The experimental research on the hydromechanical deep drawing of AZ31B magnesium alloy sheet was conducted in this paper. The deformation behaviors and the influence of internal pressure on its formability are investigated, moreover, the fracture behaviors of the obtained workpieces are discussed. The experimental results show that the formability of AZ31B magnesium alloy sheet in hydromechanical deep drawing is poorer than that in mechanical deep drawing at room temperature because the internal pressure fails to work effectively due to the weak plastic deformation capacity and the premature fracture of the kind alloy.

Fracture Mechanism and Forming Limit in Deep-Drawing of Magnesium Alloy AZ31

2001 ◽  
Vol 42 (7) ◽  
pp. 1273-1276 ◽  
Author(s):  
Masahide Kohzu ◽  
Fusahito Yoshida ◽  
Hidetoshi Somekawa ◽  
Masahiro Yoshikawa ◽  
Shigenori Tanabe ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Deep Drawing ◽  
Fracture Mechanism ◽  
Forming Limit ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31
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