Some Studies on Hot Extrusion of Rapidly Solidified Mg Alloys

Kumar, Surendra

doi:10.1361/105994906x83493

Cited by 4 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…superheating of alloy, the addition of carbon nucleating elements, Elfinal process (FeCl 3 ), etc., and also through the creation of appropriate conditions for alloy solidification. Rapid Solidification process, in which molten alloy is cast onto a spinning copper wheel ensuring high rate of heat extraction, is one of the techniques enabling the achievement of fine-grained structure [15][16][17][18][19]. The rate of solidification in this method is in a range of 10 4 -10 6 ⁰C/s.…”

Section: Introductionmentioning

confidence: 99%

Formation of Structure and Properties in Casting Processes on the Example of AZ91 Magnesium Alloy

Augustyn¹,

Szymanek²,

Kapinos³

et al. 2014

Archives of Foundry Engineering

View full text Add to dashboard Cite

Contemporary materials engineering requires the use of materials characterised by high mechanical properties, as these precisely properties determine the choice of material for parts of machinery and equipment. Owing to these properties it is possible to reduce the weight and, consequently, the consumption of both material and energy. Trying to meet these expectations, the designers are increasingly looking for solutions in the application of magnesium alloys as materials offering a very beneficial strength-to-weight ratio. However, besides alloying elements, the properties are to a great extent shaped by the solidification conditions and related structure. The process of structure formation depends on the choice of casting method forced by the specific properties of casting or by the specific intended use of final product. The article presents a comparison of AZ91 magnesium alloys processed by different casting technologies. A short characteristic was offered for materials processed by the traditional semi-continuous casting process, which uses the solidification rates comprised in a range of 5 - 20°C/s, and for materials made in the process of Rapid Solidification, where the solidification rate can reach 106 °C/s. As a result of the casting process, a feedstock in the form of billets and thin strips was obtained and was subjected next to the process of plastic forming. The article presents the results of structural analysis of the final product. The mechanical properties of the ø7 mm extruded rods were also evaluated and compared.

show abstract

Section: Introductionmentioning

confidence: 99%