Open AccessINFLUENCE OF A LOW-TEMPERATURE PLASTIC-DEFORMATION PROCESS ON THE MICROSTRUCTURE OF AN Al-Si-Mg ALUMINUM ALLOY
Author(s) -
Ceren Göde
Publication year - 2021
Publication title -
materiali in tehnologije
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.27
H-Index - 25
eISSN - 1580-3414
pISSN - 1580-2949
DOI - 10.17222/mit.2020.187
Subject(s) - materials science , microstructure , alloy , dislocation , aluminium , metallurgy , redistribution (election) , severe plastic deformation , grain boundary , plasticity , deformation (meteorology) , composite material , politics , political science , law
This work was planned to modify the microstructure of a solution-treated, cast Al-Si-Mg aluminum alloy by a plastic deformation method at a cryogenic temperature. It was found that cryo-rolling is an efficient low-temperature, plastic-deformation method that causes the transformation of a dendritic microstructure to an ultrafine-grained counterpart with a high dislocation density and the redistribution of hard silicon particles in the cast aluminum alloy. The results show cryo-rolling strains lead to an increment of the dislocation density because of the annihilation of the dislocations’ dynamic recovery. The microstructural refinement imposed by cryo-rolling seems to lead to a notable strength enhancement of the material because of the coupled impact of dislocation-strengthening and grain-boundary-strengthening mechanisms.