Differentiating the mechanical response of hierarchical magnesium nano-composites as a function of temperature

Habibi, Meisam K.; Qian, Min; Gupta, Manoj

doi:10.1016/j.matdes.2012.05.037

Cited by 8 publications

(4 citation statements)

References 33 publications

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“…These values refer to prism basal and pyramidal planes of HCP Mg crystal. Similar observation was discussed by the authors [26][27][28][29][30]. With increase in TiO 2 content in pure Mg, prism plane of Mg crystal retains at 2θ=32°, whereas the basal and pyramidal planes of Mg crystals diminished.…”

Section: X-ray Diffraction Analysissupporting

confidence: 85%

Synthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates

Elumalai

Ganesh²

2020

Mater. Res. Express

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In the present work, magnesium matrix composite reinforced with titanium dioxide (TiO 2 ) nanoparticulates was synthesized using powder metallurgy (solid-state processing) technique followed by hybrid microwave heat treatment and hot extrusion. Commercially available magnesium particulates of average particle size 60-300 μm and titanium oxide nanoparticulates of average particle size ∼21 nm was used in this study. Extruded samples of pure magnesium and magnesium titanium dioxide (Mg-TiO 2 ) nanocomposites were characterized for their physical, surface and internal microstructure (2D & 3D), elemental composition and mechanical behaviour. The experimental density and porosity of the composite specimens increases gradually with increase in addition of TiO 2 . Scanning electron micrographs (SEM) composite samples revealed that the nano TiO 2 particulates distributed uniformly throughout the matrix with no significant agglomeration. The same was confirmed through 3D internal microstructure also. The elemental composition, crystalline structure was measured using x-ray diffractograms (XRD) which confirm that no foreign elements exists. Further, the microhardness and nanoindentation of composite samples showed an increasing trend with increase in addition of TiO 2 nanoparticles.

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Section: X-ray Diffraction Analysissupporting

confidence: 85%

Synthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates

Elumalai

Ganesh²

2020

Mater. Res. Express

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“…Limited increase in the 0.2% TYS of pure Mg (particularly with 1.98 vol % TiO 2 ) and changes in its tensile fracture strain with the addition of TiO 2 NPs is due to: (a) induced textural changes of pure Mg due to the presence of NPs ( Table 2 and Figure 1 ) [ 20 , 21 , 24 , 49 ] and (b) distribution or agglomeration of TiO 2 NPs within the Mg matrix. From the XRD studies ( Table 2 ), the ratio of I basal / I max value measured along longitudinal sections of DMD and PM synthesized Mg 1.98 vol % TiO 2 nanocomposite samples are ~0.751 and ~0.655, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Under tensile loading of extruded Mg materials, basal slip is the dominant deformation mechanism and under compression loading, due to the lower critically resolved shear stress (CRSS) requirements to initiate twinning than basal slip, tensile twinning occurs [ 20 , 21 , 24 , 49 ]. The directional nature of twinning makes Mg materials to show large anisotropy when deformed under different stress states and initial textures [ 50 , 51 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Primary Processing Techniques and Significance of Hall-Petch Strengthening on the Mechanical Response of Magnesium Matrix Composites Containing TiO2 Nanoparticulates

2015

Self Cite

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In the present study, Mg (1.98 and 2.5) vol % TiO2 nanocomposites are primarily synthesized utilizing solid-phase blend-press-sinter powder metallurgy (PM) technique and liquid-phase disintegrated melt deposition technique (DMD) followed by hot extrusion. Microstructural characterization of the synthesized Mg-TiO2 nanocomposites indicated significant grain refinement with DMD synthesized Mg nanocomposites exhibiting as high as ~47% for 2.5 vol % TiO2 NPs addition. X-ray diffraction studies indicated that texture randomization of pure Mg depends not only on the critical amount of TiO2 NPs added to the Mg matrix but also on the adopted synthesis methodology. Irrespective of the processing technique, theoretically predicted tensile yield strength of Mg-TiO2 nanocomposites was found to be primarily governed by Hall-Petch mechanism. Among the synthesized Mg materials, solid-phase synthesized Mg 1.98 vol % TiO2 nanocomposite exhibited a maximum tensile fracture strain of ~14.5%. Further, the liquid-phase synthesized Mg-TiO2 nanocomposites exhibited higher tensile and compression properties than those primarily processed by solid-phase synthesis. The tensile-compression asymmetry values of the synthesized Mg-TiO2 nanocomposite was found to be lower than that of pure Mg with solid-phase synthesized Mg 1.98 vol % TiO2 nanocomposite exhibiting as low as 1.06.

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“…Reduction in porosity form leads, to the increase in tensile strength and all these happen, because of increasing sintering temperatures. Factors affecting mechanical properties to a good extent are grain size, Orowans strengthening and necessary dislocations [11].…”

Section: Results and Discussion Figure 1: Microstructures Of Mg-zr Amentioning

confidence: 99%

Effect of Sintering Temperature on Mechanical Properties of Mg-Zr Alloy

al.¹

2017

IJMPERD

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Magnesium, Zirconium alloy is developed in three different sintering temperatures through powder metallurgy technique followed by hot extrusion in this work. The application of this material is for orthopedic implants.Magnesium alloy result shows improvement in density, hardness, tensile strength and minimized porosity on increasing sintering temperature. The surface characterization of the alloy is carried out through optical microscopy. The SEM (Scanning Electron Microscope) analysis of fractured surface of Mg alloy shows quasi-cleavage fracture.

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Differentiating the mechanical response of hierarchical magnesium nano-composites as a function of temperature

Cited by 8 publications

References 33 publications

Synthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates

Synthesis and characterisation of magnesium matrix composite reinforced with titanium dioxide nanoparticulates

Effects of Primary Processing Techniques and Significance of Hall-Petch Strengthening on the Mechanical Response of Magnesium Matrix Composites Containing TiO2 Nanoparticulates

Effect of Sintering Temperature on Mechanical Properties of Mg-Zr Alloy

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