A Novel Turning-Induced-Deformation Based Technique to Process Magnesium Alloys

Abstract

A magnesium alloy was fabricated through the consolidation of chips accumulated during the turning process, followed by cold compaction and hot extrusion. A variation in the depths of cut was done during turning to understand the effect of deformation imparted during primary processing on the mechanical properties of an AZ91 alloy (Mg–9 wt.% Al–1 wt.% Zn–0.3 wt.% Mn). The results revealed a significant improvement in compressive strengths (up to 75%) with increased depth of cut, without compromising ductility through the development of fine-grained structures and prior plastic strain induction. This approach resulted in superior materials vis-a-vis conventional deformation techniques and promotes cost and energy efficiency through recycling industrial metal swarf, which is a significant environmental and economic concern.

Fe3O4 Nanoparticle-Reinforced Magnesium Nanocomposites Processed via Disintegrated Melt Deposition and Turning-Induced Deformation Techniques

“…The morphology of a typical chip produced via turning is shown in Figure 3a. The chips/turnings have two distinct regions of plastic deformation, with high and low plastic deformation regions, as shown by the presence of shear bands and as given in one of our previous works [15]. Since this deformation is induced during the turning process, we call the process of obtaining these chips and compacting them the turning-induced-deformation process.…”

“…This results in elevating the ignition temperatures as Fe 3 O 4 content increases. The TID nanocomposites were found to have relatively lower ignition temperatures due to the presence of higher porosity in the materials processed by the TID technique [15,38]. Better resistance to ignition is due to the formation of a relatively compact oxide layer (MgO) during oxidation that delays the further diffusion of oxygen towards Mg, prolonging the onset of ignition.…”

“…Such a method, named the turning-induced-deformation (TID) technique, has been recently introduced by some of the authors. This involves the consolidation of magnesium chips/turnings, followed by cold compaction and hot extrusion [15]. This technique produced extrudates with improved strength while directly utilizing machine swarf, resulting in better cost and energy efficiency owing to the fact that the chips are deformed during the turning process.…”

Influence of the Composition on the Environmental Impact of a Casting Magnesium Alloy

“…The methodology approach taken in this study was based on the EcoInvent methodology, using the dataset "magnesium alloy, AZ91 {RER}|production" as a reference. The AZ91 magnesium alloy is the most commonly used for casting applications, typically processed via high-pressure die casting [81,82]. It contains 9.1% of aluminum and small amounts of copper, zinc, and manganese [83,84].…”

Gradients of Strain to Increase Strength and Ductility of Magnesium Alloys

“…Nanoparticle addition was used to change the recrystallization behavior during extrusion, which improves the strength of magnesium alloy [24]. Combining machining and extrusion, Tekumalla et al strengthened magnesium alloy AZ91 without compromising ductility by producing fine-grained structures and SPDed grains [25]. The former works focus on the effect of uniform prior plastic strain on the mechanical properties of magnesium alloys.…”