Microstructure and mechanical properties of multi-directionally forged Mg–Al–Zn alloy

Grain Refinement and Deformation Mechanisms in Room Temperature Severe Plastic Deformed Mg-AZ31

“…Miura et al. described this as "fragmentation" of grains [44]. Hence, twinning is the first step of grain refinement.…”

Experimental and Finite Element Analysis of Flow Behavior of 2A14 Aluminum Alloy during Multi-directional Forging

“…Due to the repeating rotation of the loading direction with deformation passes during MDF, cumulative strain applied from various directions is very significant for the evolution of grain structure and flow behavior of the materials subjected to deformation. A large number of investigations on MDF have indicated that microstructure change during MDF, especially grain refinement, can be controlled by various process factors, such as strain pass, deformation temperature, strain rate, alloying elements, second phase, etc [8][9][10][11][12][13]. Sitdikov et al have found that the grain size and its volume fraction in 7475 aluminum alloys during hightemperature multi-directional compression are obviously different from those subjected to uniaxial compression [14].…”

Compressive Deformation Behavior of an Ultrafine/Nano Grained AZ31 Magnesium Processed by Accumulative Back Extrusion

“…Reported results on the mechanical properties of SPDed magnesium alloys illustrated that a miscellaneous combination of strength and ductility alterations may be obtained, depending on synergistic or antagonistic effects of grain refining and texture change [9][10][11][12][13]. Furthermore it was recognized that the Hall-Petch parameters are texture dependent so that easy activation of basal slip introduces lower values, while inhibition of basal slip leads to higher values [11].…”

“…al. [13] on multi-axial forging of AZ61 alloy implied that although the tensile strength increased with a decrease in grain size, the ductility was not spoiled.…”

“…Summarizing related literature showed a complex picture of microstrctural characteristics that dictate the mechanical behavior of SPDed material [13][14][15][16][17]. Rare researches could be found in the literature discussing the mechanisms prominent during mechanical testing of ultrafined/nano Mg based alloys.…”