Study of strength properties of semi-finished products from economically alloyed high-strength aluminium-scandium alloys for application in automobile transport and shipbuilding

Abstract

The results of a study on the strength of rolled products from aluminium alloys doped with scandium under various processing conditions of hot and cold rolling are presented. The regularities of metal flow and the level of strength of deformed semi-finished products from aluminum-scandium alloys are established, depending on the total degree of deformation and the various modes of single reduction during rolling. It is shown that when using one heating of a cast billet to obtain high-quality semi-finished products, the temperature during the rolling process should not be lower than 350-370°, and the total degree of deformation does not exceed 50-60%. It was found that the semi-finished products from alloys with a content of scandium in the range 0.11-0.12% in the deformed state had elevated values of ultimate tensile strength and yield strength of the metal, which allows them to be recommended for industrial production of sheet metal products.

Study on the influence of heat treatment modes on mechanical and corrosion properties of rolled sheet products from a new aluminum alloy, economically alloyed with scandium

“…As part of the implementation of a joint integrated project 03.G25.31.0265 «Development of economically alloyed high-strength Al-Sc alloys for use in road transport and navigation» together with the Bratsk Aluminum Smelter, studies were carried o u t o n t h e r o l l i n g r e g i m e s a s w e l l a s o n t h e properties of deformed semi-finished products obtained by hot and cold rolling from a new alloy [16][17][18][19][20]. However, the task of obtaining the required complex of mechanical properties of rolled products from a new alloy after the final heat treatment has not yet been solved.…”

Investigation of the structure and properties of cold-rolled strips from experimental alloy 1580 with a reduced scandium content

“…These alloys have a unique combination of properties, such as reduced density, corrosion resistance, weldability, high processability in pressure processing, which is why they are extremely popular in many industries, especially in transport engineering (shipbuilding, automotive, etc.) [1][2][3]. The main mechanisms for hardening the alloys of this system are solid solution hardening and cold deformation.…”

“…An example of such alloys are Russian aluminum alloys 1570 and 1580, in which the content of scandium is, respectively, 0.17-0.27, and 0.05-0.14% (wt.). The technology for producing flat products from these alloys is described in [32][33][34][35][36][37][38][39][40]. However, with the positive effect of scandium on increasing strength, the high cost of this metal limits the widespread use of these alloys.…”

Modeling and Investigation of the Process of Hot Rolling of Large-Sized Ingots from Aluminum Alloy of the Al-Mg System, Economically Alloyed by Scandium

“…Previously, studies were conducted in which was justified the choice of the chemical composition of the experimental alloy [20][21][22][23][24][25], computer models were developed, the modes of hot rolling of model ingots on a laboratory mill of DUO 330 are calculated and tested, and also received data on mechanical characteristics and structure of metal. However, these results were mainly obtained for laboratory conditions for processing ingots of small dimensions of a new alloy, manufactured at a scale of 1:10 with respect to industrial ingots.…”