Effect of rare earth elements addition on thermal fatigue behaviors of AZ91 magnesium alloy

Bayani, Hossein; Saebnoori, Ehsan

doi:10.1016/s1002-0721(08)60230-6

Cited by 52 publications

(20 citation statements)

References 10 publications

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“…From the results shown in Table 6 compiled from references [8,35,[54][55][56], the 0.2 CYS, UCS, and elastic modulus for the nanocomposite samples are closer to that of bone and bone tissues and could improve the interface between the nanocomposite and bone cells. The favored biomaterials, titanium alloys (Ti-6Al-4V), 316L stainless steel, and Co-Cr alloys exhibit significantly higher elastic modulus and are preferred only as permanent fixtures [13]. Further, in these materials there is a possibility of leaching of ions by corrosion or wear, thus decreasing their biocompatibility and causing tissue loss [57].…”

Section: Biomechanical Propertiesmentioning

confidence: 99%

“…Overall, 99% of total Mg present in our body is in bone, muscles, and soft-muscular tissues [7]. Mg exhibits elastic modulus (41)(42)(43)(44)(45) closer to that of human bone (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) in comparison to other materials such as titanium (100-110 GPa) and stainless steel (189)(190)(191)(192)(193)(194)(195)(196)(197)(198)(199)(200)(201)(202)(203)(204)(205) showing, in addition, no indication of local or systemic toxicity and hence is therefore being encouraged as a biomaterial by the scientific community [8]. It is biocompatible as well as biodegradable [9] which further helps in eliminating corrective surgery and patient trauma.…”

mentioning

confidence: 99%

“…Results obtained so far are promising, warranting further exploration of new systems. Rare earth elements (REEs) have been recently used to alloy pure Mg with encouraging results [12][13][14][15][16][17]. Rare earth oxides are natural choices as the addition of rare earth elements (REEs) as alloying elements enhances various properties of magnesium.…”

mentioning

confidence: 99%

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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: Biomechanical Propertiesmentioning

confidence: 99%

mentioning

confidence: 99%

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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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“…Most of the earlier studies were conducted mainly on the high cyclic fatigue properties of the RE-Mg alloys. [15,[35][36][37][38][39][40][41] Studies on the strain-controlled low-cycle fatigue behavior of RE-containing Mg alloys remain quite scarce to date. [17,24,32,[40][41][42][43][44][45][46][47] For example, Wang et al [32] studied the low-cycle fatigue behavior of extruded Mg-8.0Gd-3.0Y-0.5Zr (GW83) alloy under fully reversed strain-controlled tension-compression loading along the extrusion direction.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Deformation Behavior of a Rare-Earth Containing Extruded Magnesium Alloy: Effect of Heat Treatment

Mirza

Chen

et al. 2014

Metall Mater Trans A

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The present study was aimed at evaluating strain-controlled cyclic deformation behavior of a rareearth (RE) element containing Mg-10Gd-3Y-0.5Zr (GW103K) alloy in different states (as-extruded, peak-aged (T5), and solution-treated and peak-aged (T6)). The addition of RE elements led to an effective grain refinement and weak texture in the as-extruded alloy. While heat treatment resulted in a grain growth modestly in the T5 state and significantly in the T6 state, a high density of nano-sized and bamboo-leaf/plate-shaped b¢ (Mg 7 (Gd,Y)) precipitates was observed to distribute uniformly in the a-Mg matrix. The yield strength and ultimate tensile strength, as well as the maximum and minimum peak stresses during cyclic deformation in the T5 and T6 states were significantly higher than those in the as-extruded state. Unlike RE-free extruded Mg alloys, symmetrical hysteresis loops in tension and compression and cyclic stabilization were present in the GW103K alloy in different states. The fatigue life of this alloy in the three conditions, which could be well described by the Coffin-Manson law and Basquin's equation, was equivalent within the experimental scatter and was longer than that of RE-free extruded Mg alloys. This was predominantly attributed to the presence of the relatively weak texture and the suppression of twinning activities stemming from the fine grain sizes and especially RE-containing b¢ precipitates. Fatigue crack was observed to initiate from the specimen surface in all the three alloy states and the initiation site contained some cleavage-like facets after T6 heat treatment. Crack propagation was characterized mainly by the characteristic fatigue striations.

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“…This process was attributed to the reduction of Mg 17 Al 12 phase volume fraction and consequent decrease of the brittle Mg/Mg 17 Al 12 interface which was the main reason for weak thermal properties of the alloy at rather high temperatures. Further additions of RE, however, reduced the thermal shock resistance of the samples by increasing the mean length of the brittle needle shaped phases [52] …”

Section: Effect Of Rare Earth Elements Addition On Thermal Fatigue Bementioning

confidence: 97%

Review of recent studies in Magnesium matrix composites

2017

IJMTER

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Abstract-Metal matrix composites offer a wide range of opportunities for many structure applications because of their improved physical, chemical, thermal and mechanical properties in comparison with their monolithic metal counterparts. Light alloys reinforced with short fibres or particles allow adapting more exactly the work piece material properties to tailor made requirements. There is an increasing trend in the automotive industry to use these materials for various components. In this paper, recent progress in magnesium matrix composite processing technologies are reviewed. The various particle addition to magnesium matrix and its effect on composites are reported. the changes in mechanical properties due to incorporation of particles are elaborated. some composite microstructures are subsequently discussed with respect to grain refinement, reinforcement distribution, and interfacial characteristics. The tribological properties of the magnesium matrix composites are also reported.

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Effect of rare earth elements addition on thermal fatigue behaviors of AZ91 magnesium alloy

Cited by 52 publications

References 10 publications

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

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

Cyclic Deformation Behavior of a Rare-Earth Containing Extruded Magnesium Alloy: Effect of Heat Treatment

Review of recent studies in Magnesium matrix composites

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