Journals Information
Universal Journal of Materials Science Vol. 4(4), pp. 82 - 87
DOI: 10.13189/ujms.2016.040402
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Cold Deep-drawing of AZ31 Magnesium Alloy Sheet under Controlled Forming Motion Using Servo Press Machine
Masahiro Ohkawa 1,2,*, Akito Takasaki 3
1 Graduate School of Engineering and Science, Shibaura Institute of Technology, Japan
2 Plastic Forming Engineering Unit, Polytechnic University, Japan
3 Department of Engineering Science and Mechanics, Shibaura Institute of Technology, Japan
ABSTRACT
The deep drawing of an AZ31 magnesium alloy sheet with a commonly used metal mold by three kinds of drawing motions (crank, vibration, and step-by-step motion) was performed, and the effect of drawing motions on the forming performances of the alloy sheet was investigated. For all the forming motions, the limited drawing ratio (LDR) reached was 1.25, and crack formation was limited at the flange part with the rolling direction. The vibration motion, which has a bigger shoulder region, cause greater lattice distortion of the side wall than other motions and the lattice strain for vibration motion increased from the bottom to the side wall of the sheet after drawing, whereas the heteromorphic histories for other motions were different. The crystallite size was largest at the bottom of the sheet for all the forming motions. However, it decreased at the shoulder part of the sheet and also at the side wall. The crystalline grains structure was not affected by drawing motions. It was found that the drawing motions affected the state of stress-relaxation after drawing.
KEYWORDS
AZ31 Magnesium Alloy, Deep Drawing, Servo Press, LDR, Room Temperature Forming
Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Masahiro Ohkawa , Akito Takasaki , "Cold Deep-drawing of AZ31 Magnesium Alloy Sheet under Controlled Forming Motion Using Servo Press Machine," Universal Journal of Materials Science, Vol. 4, No. 4, pp. 82 - 87, 2016. DOI: 10.13189/ujms.2016.040402.
(b). APA Format:
Masahiro Ohkawa , Akito Takasaki (2016). Cold Deep-drawing of AZ31 Magnesium Alloy Sheet under Controlled Forming Motion Using Servo Press Machine. Universal Journal of Materials Science, 4(4), 82 - 87. DOI: 10.13189/ujms.2016.040402.