The effects of the submicrocrystalline (SMC) and microcrystalline (MC) structures of plates made of 1560 (Al-6.5Mg-0.6Mn) and 5083 (Al-4.4Mg-0.7Mn-0. 15Cr) alloys subjected to severe plastic deformation (SPD) via angular pressing followed by annealing on the characteristics of their room-temperature static strength and cracking resistance have been studied. After SPD, the alloys with an SMC fragmented structure have a strength that is 10-15% higher than that of the 1560 alloy in the cold-worked state at the same ductility; however, their cracking resistance is two to five times lower than that of the annealed alloys with a recrystallized MC structure (after pressing and annealing at 350°C). Annealing of the SPD alloys at 200°C transforms the non-equilibrium deformed structure into an SMC grain structure. Against the background of an insignificant decrease in strength, this annealing increases the ductility and cracking-resistance characteristics in both alloys. The cracking resistance of the 5083 alloy almost reaches the level of the soft MC state. The causes of the dissimilar behavior of the alloys are analyzed. Apart from strong changes in the grain structure during treatment, the mechanical properties of the alloys are shown to substantially depend on their lattice parameter and phase composition.

Original languageEnglish
Pages (from-to)398-405
Number of pages8
JournalRussian Metallurgy (Metally)
Volume2005
Issue number5
StatePublished - 1 Sep 2005
Externally publishedYes

    Scopus subject areas

  • Metals and Alloys

ID: 42940182