Microstructure and damping behaviour of consolidated magnesium chips

Anilchandra, A. R.; Surappa, M.K.

doi:10.1016/j.msea.2012.02.038

Cited by 22 publications

(17 citation statements)

References 37 publications

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“…Dislocation density can be quite significant at the interface and it increases with increasing Sm 2 O 3 content. For magnesium-based materials, increased dislocations are favorable for the damping enhancement as dislocation pinning contributes to the damping behavior of magnesium nanocomposites [46]. The increase in dislocation density can also be attributed to the presence of hard Sm 2 O 3 NPs in the magnesium matrix [47].…”

Section: Elastic Modulus and Damping Characteristicsmentioning

confidence: 99%

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Kujur

Mallick

Manakari

et al. 2017

Metals

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Abstract:The present study reports the development of Mg-Sm 2 O 3 nanocomposites as light-weight materials for weight critical applications targeted to reduce CO 2 emissions, particularly in the transportation sector. Mg-0.5, 1.0, and 1.5 vol % Sm 2 O 3 nanocomposites are synthesized using a powder metallurgy method incorporating hybrid microwave sintering and hot extrusion. The microstructural studies showed dispersed Sm 2 O 3 nanoparticles (NPs), refinement of grain size due to the presence of Sm 2 O 3 NPs, and presence of limited porosity. Microhardness and dimensional stability of pure Mg increased with the progressive addition of Sm 2 O 3 NPs. The addition of 1.5 vol % of Sm 2 O 3 NPs to the Mg matrix enhanced the ignition temperature by~69 • C. The ability of pure Mg to absorb vibration also progressively enhanced with the addition of Sm 2 O 3 NPs. The room temperature compressive strengths (CYS and UCS) of Mg-Sm 2 O 3 nanocomposites were found to be higher without having any adverse effect on ductility, leading to a significant increase in energy absorbed prior to compressive failure. Further, microstructural characteristics are correlated with the enhancement of various properties exhibited by nanocomposites.

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Section: Elastic Modulus and Damping Characteristicsmentioning

confidence: 99%

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Kujur

Mallick

Manakari

et al. 2017

Metals

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show abstract

“…A great majority of studies on this topic have focussed on recycling machining swarf into cylindrical bars [3][4][5][6][7][8][9][10][11][12] or rectangular bars [13][14][15], using hot/warm forward extrusion. In addition, recycling processes based on other SPD methods such as cyclic extrusion compression (CEC) [16], equal channel angular pressing (ECAP) [17][18][19], high-pressure torsion (HPT) [20] or compressive torsion [21], and combined use of forward extrusion and ECAP [22,23] have also been reported.…”

Section: Introductionmentioning

confidence: 99%

Solid-state recycling of aluminium alloy swarf into c-channel by hot extrusion

Chiba

Yoshimura

2015

Journal of Manufacturing Processes

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“…Increase in grain size was more in AE material ($ 3 times) with the increase in extrusion temperature from 250 1C to 400 1C compared to CCE ($ 2 times). This is mainly because of higher grain refinement in chip consolidated materials [13] and could be attributed to grain growth suppression at chip boundaries [17]. Table 1 clearly shows that under all extrusion conditions CCE materials exhibit higher UTS and 0.2% TPS compared to AE materials.…”

Section: Microstructurementioning

confidence: 94%