Microstructural Evolution and Strengthening of AM90 Magnesium Alloy Processed by ECAP

WITHDRAWN: Effect of equal channel angular pressing route and temperature on the mechanical behavior of ZE41 Mg alloy

“…The high work hardening leading to these enhanced mechanical properties were attributed to the high dislocation density, profuse twinning and re nement in twin and grain sizes. Also, static recrystallization occurring during the heating of samples before conducting ECAP and dynamic recrystallization which occurs during ECAP promote the grain re nement [25]. The increase in yield strength to 231.5MPa and fracture elongation to 27.2% of a ZK60 Mg-Zn-Zr alloy after 4 ECAP passes at 493K was also attributed to the concomitant grain re nement from 30 μm to ∼0.8 μm [71].…”

“…These peak variations are produced by grain re nement during the ECAP process (peak broadens due to grain re nement). Koike et al [40] observed that peak variations in ECAP samples are due to the activation of a slip process by the grain boundaries and texture modi cation is the effective strengthening mechanism in Mg alloys [25]. Further, they have noted that number of ECAP passes in uences the variations in the peaks with stronger variations occurring at higher ECAP passes.…”

“…ECAP was conducted using a plunger xed to a Universal testing machine (UTM) head at a speed of 0.25 mm/min. Based on literature [25], a total strain of 0.8 was induced in each pass.…”

“…The high ductility and high strain hardening rate after rolling and ECAP was attributed to easy activation of basal slip and twinning due to the non-basal texture. Gopi et al [25] obtained a homogenous and stable microstructure by the ECAP of AM90 Mg alloy using route B C at 275 o C because of dynamic recrystallization (DRX). Also, the ECAP treated samples exhibited a 25% and 80% increase in yield strength (YS) and ultimate tensile strength (UTS), respectively.…”

Influence of Texture on the Mechanical Properties of a Mg-6Al-1Zn-0.9Sn Alloy Processed by ECAP

“…Although ECAP can refine grains, the high strength and toughness may not be necessarily achieved. The yield strength of Mg alloys may be reduced after ECAP, especially those with strong basal textures [17,[25][26][27][28][29]. How to ensure the reasonable match between microstructure refinement and texture modification during ECAP is the critical point to improve strength and toughness.…”