Investigation of rolling modes, structure, and properties of aluminum-magnesium alloy plates with a reduced scandium content

Abstract

Investigations of the rolling modes of plates from an experimental aluminum-magnesium alloy with a scandium content of 0.10-0.11 wt.%, corresponding to the chemical composition of the 1580 alloy, were carried out in laboratory and industrial conditions. It has been found that alloying of this material with scandium within the indicated limits leads to a signi cant grain re nement in the cast ingot and an increase in the strength properties of deformed seminished products. Based on the results of physical modeling of the rolling process, rational reduction modes are proposed, which made it possible to obtain deformed semi-nished products with the required level of mechanical properties. To assess the formation patterns of the metal structure necessary to obtain high-quality plates, a metallographic analysis of the structure of cast and deformed semi-nished products from an experimental alloy was carried out. The results were used to test the reduction modes during sheet rolling and to adjust the casting parameters of experimental ingots. Based on the results of the research, recommendations were formulated for the development and implementation of an industrial technology for rolling plates from alloy 1580 with a thickness of 31.5-45 mm from ingots with a thickness of 300-450 mm.

One-pot in situ construction of amido and hydroxyl co-modified layered double hydroxides for selective scandium adsorption

“…Scandium (Sc), classified as a special rare-earth element, has been widely used in the fields of aerospace, electronics, medical treatment, catalysis, etc., 1 especially new high-end alloy materials such as magnesium-scandium alloy and aluminum-scandium alloy. [2][3][4] Because of its excellent properties, it is strategically significant for aerospace and military fields. 5 However, its distribution is highly dispersed, and it is often associated with bauxite, scandium manganese tantalum, rare earth ore, and other minerals; 6 therefore, it is difficult to separate and produce highly pure scandium.…”