scholarly journals Microstructure and Mechanical Properties of AZ31 Magnesium Alloy Strip Produced by Twin Roll Casting

2006 ◽  
Vol 47 (7) ◽  
pp. 1743-1749 ◽  
Author(s):  
Yusuke Nakaura ◽  
Akira Watanabe ◽  
Koichi Ohori
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Az31 Magnesium Alloy ◽  
Alloy Strip ◽  
Twin Roll Casting ◽  
Microstructure And Mechanical Properties ◽  
Roll Casting ◽  
Twin Roll

Properties of AZ31 Magnesium Alloy Sheet Produced by Twin Roll Casting

2005 ◽  
Vol 488-489 ◽  
pp. 419-426 ◽  
Author(s):  
Yusuke Nakaura ◽  
Koichi Ohori
Keyword(s):  
Magnesium Alloy ◽  
Az31 Alloy ◽  
Az31 Magnesium Alloy ◽  
Rolled Sheet ◽  
Alloy Strip ◽  
Cast Strip ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Hot Rolled ◽  
Twin Roll

Twin roll casting has been used to produce AZ31 magnesium alloy strip. The size of the cast strip is 5mm thick and 250mm wide. The microstructure of the as-cast AZ31 alloy strip consists of columnar zones from the surface to mid-thickness region and equiaxed zones in the mid-thickness region. The secondary dendrite arm spacing varies from 5.0 to 6.5 μm through the thickness and width of the strip and is much smaller than 34μm of an AZ31 alloy DC ingot used for comparison. In the temperature ranging from room temperature to 400°C, the tensile strength and elongation of the as-cast strip are higher and smaller than those of DC ingot, respectively. Elongation is evidently improved by homogenization treatment and becomes more than that of the DC ingot. Such an improvement of elongation is though to be caused by homogenization of segregation of Al and Zn atoms in the dendrite cell boundaries. The non-homogenized and homogenized strips were subsequently hot rolled. Their hot rolled sheets have much higher value of elongation with equivalent strength, compared to the hot rolled sheet of flat-bar extruded from DC ingot in the temperature ranging from 200°C to 300°C.

SUPERPLASTIC FORMABILITY OF AZ31 MAGNESIUM ALLOY SHEETS PRODUCED BY TWIN ROLL CASTING AND SEQUENTIAL HOT ROLLING

2013 ◽  
Vol 27 (19) ◽  
pp. 1341020
Author(s):  
YANDONG YU ◽  
KAI LIN ◽  
PENG JIANG
Keyword(s):  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Hot Rolling ◽  
Tensile Testing ◽  
Az31 Magnesium Alloy ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Three Stages ◽  
The Common ◽  
Twin Roll

In this paper, superplastic tensile testing and gas bulging forming of AZ31 and AZ31 + Y + Sr magnesium alloys produced by twin roll casting (TRC) and sequential hot rolling were carried out. At 673 K, the superplastic formability of the TRC AZ31 magnesium alloy sheets added Y and Sr elements has improved significantly compared to the common TRC AZ31 sheets. Formations of cavities on the bulging part go through three stages of the nucleation, growth and aggregation, finally cavities merging lead to rupture at the top of the bulging part.

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