Properties of Al-6Mg-xSc (x = 0 to 0.6 wt.%) Alloy Subjected to Thermal Treatment: A Review

Abstract

Aluminum-magnesium alloys are regularly used to manufacture different types of sheets, automotive trims, and architectural components, which are very intricate in shape. Additionally it is important due to their excellent properties of high-strength to weight ratio, corrosion resistance and weldability. Magnesium increases the strength of the alloys but there is a tendency to form -phase Al 8 Mg 5 compound, usually denoted as Al 3 Mg 2 precipitates along grain boundaries to facilitate intergranular fracture. Numerous studies have been conducted on these alloys to make their use potential as different places. The use of scandium in Al-Mg alloys is meant for taking the advantage of grain refinement along with the unique precipitation strengthening behavior through the formation of Al 3 Sc precipitates with aluminum, a stable LI 2 phase coherent with the matrix. The purpose of this paper is to review and discuss recent developments on Al-6Mg alloy through scandium addition at different levels under thermal treatment.

"Precipitation behavior prior to hot roll in the cold-rolled Al-Mg and Al-Mg-Zr alloys "

“…An effective alternative method, adding minor alloying elements such as Zr, is used to increase the strength and thermal stability of Al--Mg alloys by forming Al 3 Zr dispersoids [7][8][9]. It is known that cold rolling creates a substructure consisting of a high density of dislocations within grains, cells bounded by arbitrary dislocation boundaries, extended boundaries termed as geometrically necessary boundaries, and shear bands [10,11]. After high rolling reduction, the formation of a lamellar structure or ultrafine grains may take place, which has a very strong influence on the subsequent anisotropy of the sheet products in high-strength conditions [12].…”