Effect of annealing treatment on the mechanical properties and corrosion behaviors of 01570 aluminum alloy

Abstract

01570 aluminum alloy was cold rolled and annealed at different temperatures, and their microstructure, mechanical properties, pitting and stress corrosion cracking (SCC) behaviors were observed and determined by scanning electron microscopy (SEM), transmission electron microscopy (TEM), immersion test, slow strain rate tensile (SSRT), and constant loading tests. The results reveal that the dislocations within the grains of alloy 01570 are transformed from dislocation tangles to dislocation walls and subgrains as the treatment varies from the cold rolled temper to the annealed tempers; at the same time, the tensile strength and SCC resistance of alloy 01570 are increased and the elongation is decreased, whereas the corrosion rate is negligibly influenced by the annealing treatments. Therefore, the annealed at 300 8C temper can be selected as the optimum heat treatment for the practical application of alloy 01570.

Corrosion behavior of heat-treated and cryorolled Al 5052 alloys in different chloride ion concentrations

“…Aluminum and its alloys, especially Al-Mg alloy, are becoming commonly used metals. Al-Mg alloys are used for components that require good design efficiency, welding attributes and superplasticity; high resistance to corrosion; and high strengthto-weight ratio coupled with minimum cost (Wang et al, 2014). Al 5052 alloys are strain-hardened Al-Mg alloys characterized by good weldability, moderately high strength, good corrosion resistance and very high toughness even at cryogenic temperatures to near absolute zero (Yasakau et al, 2018).…”