Mechanical behavior of a lanthanum-doped magnesium alloy at different strain rates

Shen, Jianghua; Yin, WenXuan; Kondoh, Katsuyoshi; Jones, Tyrone L.; Kecskes, Laszlo J.; Yarmolenko, S.; Wei, Q.

doi:10.1016/j.msea.2014.12.061

Cited by 11 publications

(5 citation statements)

References 69 publications

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“…In other words, this corresponds to the inflexion point on the sigmoidal stress-strain curve. It has been argued that the existence of such an inflexion point may be the critical condition for ASBs in Mg-alloys with a strong strain hardening behavior [52]. In the following section, we propose a basis for the occurrence of ASB in AMX602.…”

Section: Discussionmentioning

confidence: 95%

“…Recently, it has been noticed that Mg as well as Mg alloys tend to fail by ASB which is a mode of plastic instability for certain visco-plastic materials [52] [53,71]. Conventionally, two approaches have been employed to investigate the problem of ASBs.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, adiabatic shear banding (ASB) has been identified as a common mode of plastic instability which leads to final failure of several Mg-alloys, particularly under dynamic loading [51][52][53]. A general theory based on the competition between work-hardening and thermalsoftening of the material concludes that ASB occurs when work-hardening is out-paced by thermal softening [54].…”

Section: Introductionmentioning

confidence: 99%

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Effect of strain rate on the mechanical properties of magnesium alloy AMX602

Shen

Kondoh

Jones

et al. 2016

Materials Science and Engineering: A

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In the present work, the effect of strain rate on the mechanical properties, particularly the plastic deformation behavior of a magnesium alloy, AMX602 (Mg-6%Al-0.5%Mn-2%Ca; all wt.%), fabricated by powder metallurgy, has been investigated under both quasi-static (strain rate 1×10 -3 s -1 ) and dynamic (strain rate 4×10 3 s -1 ) compressive loading. The alloyed powder was extruded at three different temperatures. The microstructure of the alloy was examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that AMX602 exhibits an impressive mechanical behavior but with a slight anisotropy along different directions in both strength and compressive ductility (or malleability). The strength was found to be nearly independent of the extrusion temperature, particularly, under dynamic loading.Nanoindentation strain rate jump test reveals a strain rate sensitivity of ~0.018 to ~0.015, depending on the extrusion temperature. Sub-micrometer-scale particles of the intermetallic 2 compound Al 2 Ca were found with sizes ranging from ~100nm to ~1.0μm. These intermetallic particles are believed to have precipitated out during the extrusion process. They contribute to the formation of the ultrafine equiaxed grains which, in turn, help to improve the strength of the alloy by acting as barriers to dislocation motion. Adiabatic shear bands (ASBs) were observed in the dynamically loaded samples, the propagation of which eventually leads to final fracture of the specimens.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of strain rate on the mechanical properties of magnesium alloy AMX602

Shen

Kondoh

Jones

et al. 2016

Materials Science and Engineering: A

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“…Complex geometries can be created with good interfacial bonding and great dispersion using liquid-state processing, which is cost-effective. Mechanical qualities are improved due to the excellent bonding and homogeneous distribution of reinforcement [35]. The most commonly used liquid metallurgy processes are stir casting, centrifugal casting and squeeze casting.…”

Section: Liquid-state Processingmentioning

confidence: 99%

“…La addition to ZK60 alloy resulted in a formation of a Mg-Zn-La ternary phase, generating a semi-continuous network structure in their as-cast state [34]. The mechanical behaviour of a lanthanum-doped Mg alloy, AZXE7111, (Mg-7Al-1Zn-1Ca-1La, all in wt.%) extruded at different temperatures has been investigated by shen et al [35]. Malik et al investigated the higher dynamic mechanical response by adjusting texture through twinning in a ZK61 Mg alloy [36].…”

Section: Introductionmentioning

confidence: 99%

Manufacturing Techniques for Mg-Based Metal Matrix Composite with Different Reinforcements

et al. 2022

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Magnesium is among the lightest structural metals available, with the capacity to replace traditional alloys in mass-saving applications while still providing increased stiffness and strength. The inclusion of reinforcing components into the metallic matrix has a substantial impact on stiffness, specific strength, wear behaviour, damping behaviour, and creep properties when compared to typical engineering materials. Due to their outstanding physical and mechanical characteristics along with low density, magnesium metal matrix composites are viable materials for numerous applications. This study discusses how to choose an appropriate technique and its process parameters for synthesising magnesium-based metal matrix composites (MMCs) and gives an overview of the impacts of various reinforcements in magnesium and its alloys, emphasising their benefits and drawbacks. The essential applications of various magnesium-based MMCs are also critically examined in this article. The impact of reinforcement on the microstructure as well as mechanical characteristics are thoroughly examined.

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Improvement on dynamic fracture properties of magnesium alloy AZ31B through equal channel angular pressing

et al. 2017

Engineering Fracture Mechanics

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Mechanical behavior of a lanthanum-doped magnesium alloy at different strain rates

Cited by 11 publications

References 69 publications

Effect of strain rate on the mechanical properties of magnesium alloy AMX602

Effect of strain rate on the mechanical properties of magnesium alloy AMX602

Manufacturing Techniques for Mg-Based Metal Matrix Composite with Different Reinforcements

Improvement on dynamic fracture properties of magnesium alloy AZ31B through equal channel angular pressing

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