Numerical Modeling of Magnesium Alloy Sheet Metal Forming at Elevated Temperature

2007 ◽  
Author(s):  
Myeong-Han Lee ◽  
Heon-Young Kim ◽  
Hyung-Jong Kim ◽  
Yi-Chun Choi ◽  
Soo-Ik Oh
Keyword(s):  
Numerical Modeling ◽  
Elevated Temperature ◽  
Magnesium Alloy ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Alloy Sheet ◽  
Magnesium Alloy Sheet

Investigation into AZ31 Sheet Metal Deep Drawing Process at Elevated Temperature

2010 ◽  
Vol 154-155 ◽  
pp. 1244-1250
Author(s):  
Peng Cheng Wang ◽  
Pei Wu ◽  
Zhi Yong Yue
Keyword(s):  
Elevated Temperature ◽  
Magnesium Alloy ◽  
Sheet Metal ◽  
Deep Drawing ◽  
Elevated Temperatures ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
Magnesium Alloy Sheet ◽  
Az31 Magnesium Alloy Sheet ◽  
Az31 Sheet

In this paper, mechanical properties of unidirectional hot tensile tests of 3mm thick AZ31 magnesium alloy sheet metal are researched at elevated temperatures and under different tensile speeds. In this basis, thermal deep drawing of cylinders tests for 3mm thick AZ31 magnesium alloy sheet are investigated at elevated drawing temperatures, different drawing speeds and so on. Thermal deep drawing performance showed that set pieces better when elevated temperature and drawing speed range are appropriate to deep drawing.

Formability Analysis on Superplastic Forming of AZ91 Magnesium Alloy Sheet

2018 ◽  
Vol 385 ◽  
pp. 437-442
Author(s):  
G. Kumaresan ◽  
K. Kalaichelvan
Keyword(s):  
Magnesium Alloy ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Thermomechanical Processing ◽  
Sheet Thickness ◽  
Superplastic Forming ◽  
Alloy Sheet ◽  
Az91 Magnesium Alloy ◽  
Forming Temperature

Superplastic sheet metal forming allows the production of complex parts that are not formable under normal conditions. Superplastic sheet metal forming processes are normally based on the same common principle: the sheet metal is firmly clamped between the die halves and is blow-formed by means of gas pressure. Generally superplastic forming can only be achieved in a very narrow range of strain rates and temperature. Superplastic materials are relatively stable when deformed; this behavior is related to the observation that the flow stress of a superplastic material is very sensitive to the rate of deformation. This paper aims to study the formability characteristic of Magnesium alloy by considering variable parameters, such as the sheet thickness, forming pressure and forming temperature. The forming time of 120 minutes is constant for the formability test. Keywards: Multi dome test, superplasticity, Mg – alloy, Thermomechanical processing, Formability.

Numerical modeling crack propagation of sheet metal forming based on stress state parameters using XFEM method

2013 ◽  
Vol 69 ◽  
pp. 311-326 ◽  
Author(s):  
Fengmei Xue ◽  
Fuguo Li ◽  
Jiang Li ◽  
Min He ◽  
Zhanwei Yuan ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Stress State ◽  
Crack Propagation ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming

Tool Concepts and Materials for Incremental Sheet Metal Forming with Direct Resistance Heating

2013 ◽  
Vol 549 ◽  
pp. 61-67 ◽  
Author(s):  
Horst Meier ◽  
Christian Magnus ◽  
Bolko Buff ◽  
Jun Hong Zhu
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Electric Current ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Resistance Heating ◽  
Mechanical Contact ◽  
New Process ◽  
Incremental Sheet Metal Forming

ncremental sheet metal forming with direct resistance heating is used for flexible sheet metal forming at elevated temperature, where electric current is conducted through the forming tool (s) into the forming zone. The electrical and mechanical contact combined with a high temperature of up to 600°C in steel forming results in complex tool requirements and a high wear of the tooltip. Starting with a description of a new process setup, both studies concerning existing and new tool concepts and materials will be presented in this paper. Therefore, the wear of different materials for tooltips and its dependence on lubrication has been investigated in forming experiments and will be thoroughly discussed.

Enhanced formability at elevated temperature of a cross-rolled magnesium alloy sheet

2006 ◽  
Vol 441 (1-2) ◽  
pp. 349-356 ◽  
Author(s):  
Yasumasa Chino ◽  
Kensuke Sassa ◽  
Akira Kamiya ◽  
Mamoru Mabuchi
Keyword(s):  
Elevated Temperature ◽  
Magnesium Alloy ◽  
Alloy Sheet ◽  
Magnesium Alloy Sheet

Effects of Rolling Direction and Lubricant on Friction in Sheet Metal Forming

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
Xiaojun Liu ◽  
Mathias Liewald ◽  
Dina Becker
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Rolling Direction ◽  
Alloy Sheet ◽  
Friction Behavior ◽  
Drawing Test ◽  
Strip Drawing ◽  
The Coefficient Of Friction ◽  
Surface Microstructures

Lubrication and friction at workpiece-tool interface play an important role in product quality control of sheet metal forming process. Surface microstructures of sheets have a great influence on the development of lubrication films. In order to investigate the effects of the rolling direction of aluminum alloy sheet and lubricant on the friction behavior in sheet metal forming, strip drawing test was used. The sample used was electric discharge texturing (EDT) surface. Lubricants, both with and without additives, were used. The strip drawing tests were performed at angles between the sliding and rolling directions of 0–90 deg. Variations in the sheet surface topography were analyzed by comparing the sheet surface microstructures and its 3D surface parameters before and after the strip drawing test. Results of the strip drawing tests indicate that the kind and amount of lubricant have great influences on friction at the interface, and the lubricant with additives benefits improving the friction behavior between the sheet and the tool. The EDT surface of the aluminum alloy sheet has an anisotropic frictional property during deep drawing process due to different angles between the sliding and rolling directions. When the sliding direction is parallel to the rolling direction, the coefficient of friction has the highest value. When the angle between the sliding and rolling directions increases, the coefficient of friction decreases. The surface microstructure of the sheets after the strip drawing test at different angles between the sliding and rolling directions has been modified, and its 3D surface parameters decrease significantly to a different degree.

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