Improvement of Mechanical Properties and Microstructure of Twin-Roll-Cast AMX1001 Magnesium Alloy by Rolling Process

Twin roll casting process combines casting and hot rolling into a single process. In this study, mechanical properties at room temperature and microstructure of the twin roll cast AZ91 magnesium alloy are investigated. The alloy exhibited a good combination of high ultimate strength of 343MPa, yield stress of 224MPa and elongation to failure of 13%. The mechanical property was very excellent compared with AZ91 die-cast alloy. EPMA analysis reveals that the Al concentration in Mg matrix is higher in twin roll cast alloy than that in die-cast alloy. This high Al concentration must be the origin of the good mechanical properties of twin roll cast alloy at room temperature.

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Microstructure and mechanical properties of twin roll cast AM31 magnesium alloy sheet processed by differential speed rolling

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2011.06.060 ◽

2012 ◽

Vol 34 ◽

pp. 746-752 ◽

Cited By ~ 18

Author(s):

L.L. Chang ◽

J.H. Cho ◽

S.K. Kang

Keyword(s):

Mechanical Properties ◽

Magnesium Alloy ◽

Alloy Sheet ◽

Magnesium Alloy Sheet ◽

Microstructure And Mechanical Properties ◽

Differential Speed Rolling ◽

Twin Roll Cast ◽

Twin Roll ◽

Differential Speed

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Mechanical Properties of Twin Roll Cast AZ91 Magnesium Alloy at Room Temperature

Advanced Materials Research - Advanced Materials and Processing ◽

10.4028/0-87849-463-4.145 ◽

2007 ◽

pp. 145-148 ◽

Cited By ~ 2

Author(s):

Shu Hei Uchida ◽

Ippei Takeuchi ◽

Gentaro Gonda ◽

Kinji Hirai ◽

Tokuteru Uesugi ◽

...

Keyword(s):

Mechanical Properties ◽

Magnesium Alloy ◽

Room Temperature ◽

Az91 Magnesium Alloy ◽

Az91 Magnesium ◽

Twin Roll Cast ◽

Twin Roll

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Microstructure and Texture of MX20 after Conventional Rolling and Rolling from Twin Rolled Cast Strip

Materials Science Forum ◽

10.4028/www.scientific.net/msf.941.1418 ◽

2018 ◽

Vol 941 ◽

pp. 1418-1423

Author(s):

Gerrit Kurz ◽

Tom Petersen ◽

Roland Hoppe ◽

Jan Bohlen ◽

Dietmar Letzig

Keyword(s):

Magnesium Alloy ◽

Rolling Process ◽

Twin Roll Casting ◽

Roll Casting ◽

Internally Cooled ◽

Twin Roll Cast ◽

Conventional Rolling ◽

Twin Roll ◽

Free Magnesium ◽

Feedstock Material

Two main impediments are currenty discussed with respect to the industrial application of magnesium sheets. First, the low formability of magnesium sheets requires many rolling passes to roll cast slabs to final gauge, which leads, second, to high costs for the production of magnesium sheets. An alternative cost-saving process chain for magnesium sheets with enhanced properties is the feedstock production by twin roll casting (TRC). In the TRC process, liquid metal proceeds from a furnace over a pipe into a crucible and then flows between a pair of counter rotating, internally cooled rolls. The metal solidifies upon touch with the cooled rolls and gets rolled to a strip. This paper refers to the comparison of the two processing routes on the example of the aluminum-free magnesium alloy MX20 (2 wt% Mn and 0.5 wt% Ca). Both kinds of production processes like casting and twin roll casting have an influence on the microstructure and texture of the feedstock material for the subsequent rolling process. The paper reports on the results of casting and twin roll casting experiments of this alloy. Furthermore, rolling trials are conducted and the deformation behavior of the sheets are presented and discussed with respect to the developed microstructures and textures. The different morphology of precipitates in the cast and twin roll cast feedstock material is used to improve the ductility of the magnesium alloy MX20.

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Effects of Ultrasound on the Microstructures and Mechanical Properties of Cast-Rolling AZ31B Magnesium Alloy Strip

Materials Science Forum ◽

10.4028/www.scientific.net/msf.686.129 ◽

2011 ◽

Vol 686 ◽

pp. 129-134 ◽

Cited By ~ 1

Author(s):

Jian Ping Li ◽

Jian Bing Hu ◽

Da Heng Mao ◽

Guan Zhong Zhao

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Magnesium Alloy ◽

Yield Strength ◽

Grain Structure ◽

Alloy Strip ◽

Test Results ◽

Twin Roll Cast ◽

Twin Roll ◽

Grain Diameter

The experiment of ultrasonic cast-rolling magnesium strip was carried out on the horizontal twin-roll cast-rolling machine with the ultrasonic pole used in the solidification. The microstructures of ultrasonic and general cast-rolling magnesium strip were characterized. The results showed that the cellular dendrite of the general cast-rolling magnesium strip was coarse, the grain structure was heterogeneous and the average grain diameter was between 50μm~60μm. However, the grain structure became more homogenize after the ultrasonic treatment for cast-rolling magnesium strip, the grain was refined and the average grain diameter was between 20μm~30μm. Besides, the mechanical properties test results show that the tensile strength, yield strength and elongation of the ultrasonic cast-rolling magnesium strip were increased by 22.85%, 49.78% and 123.06% than those of the general cast-rolling magnesium strip.

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