Effect of rare earth elements on deformation behavior of an extruded Mg–10Gd–3Y–0.5Zr alloy during compression

Mirza, F.A.; Chen, D.L.; Li, D.J.; Zeng, Xiaoqin

doi:10.1016/j.matdes.2012.10.040

Cited by 81 publications

(43 citation statements)

References 38 publications

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“…One appealing approach of achieving this goal is via alloy composition adjustment, e.g., addition of rare-earth (RE) elements into Mg alloys. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] These RE-Mg alloys possess quite random initial crystallographic texture which leads to improved ductility and strength at both room and elevated temperatures via solid solution strengthening and precipitation strengthening. [31,32] It was reported that an RE element alternates the bonding energy between the Mg atom and the RE atom, thus increasing the possibility of non-basal slip and inhibiting the basal slip and f1012g twinning.…”

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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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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“…This longer stage III mainly results from dislocation-twin interactions and the interaction of precipitates with dislocations or twins. [8] The decreasing of the work hardening rate results in the monotonous decrease of UTS at high temperature.…”

Section: Temperature Dependence Of Mechanical Propertiesmentioning

confidence: 99%

“…[5,6] Many studies were conducted with regard to the microstructure, precipitation sequences, mechanical properties, and forming process of the extruded Mg-Gd-Y-Zr alloy system. [7][8][9][10] Given the results in the literatures, [11] the Mg-10Gd-3Y-0.5Zr alloy exhibits higher strength and better ductility compared with the other Mg-Gd-Y-Zr alloy. As a matter of fact, sand casting is a more practicable way in producing complex-shaped aerospace structural components, and those components endure complex load and high temperature.…”

Section: Introductionmentioning

confidence: 99%

High‐Temperature Tensile and Compressive Behavior of Peak‐Aged Sand‐Cast Mg–10Gd–3Y–0.5Zr Alloy

Chen

Liu

et al. 2015

Adv Eng Mater

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The uniaxial tensile and compressive behavior of the peak-aged sand-cast Mg-10Gd-3Y-0.5Zr alloy from 25 to 250 C is investigated. The results show that the alloy exhibits excellent high-temperature tensile and compressive properties compared with other magnesium alloys. The tensile yield stress and ultimate tensile strength remain unchanged, while the compressive yield strength slightly increases when testing temperature rises from 25 to 150 C. This can be attribute to the metastable b 0 (cbco) phase and the fine ductility of the alloy at high temperature. The alloy shows tension-compression yield asymmetry which could be associated to the pyramidal slip and extension twinning. In addition, the fracture mechanisms of the tested alloy at different temperatures are studied systematically.

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“…is predominated by the high density of twinning while the volume fraction of twins decreases with increasing the strain rate [41,42]. Some additional slip systems become active at the temperature higher than 200 1C, providing sufficient independent systems to fulfill the von Mises criterion [43].…”

Section: Effect Of Temperaturementioning

confidence: 99%

Effect of strain rate and temperature on the mechanical behavior of magnesium nanocomposites

Xiao

Shu

Wang

2014

International Journal of Mechanical Sciences

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Effect of rare earth elements on deformation behavior of an extruded Mg–10Gd–3Y–0.5Zr alloy during compression

Cited by 81 publications

References 38 publications

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

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

High‐Temperature Tensile and Compressive Behavior of Peak‐Aged Sand‐Cast Mg–10Gd–3Y–0.5Zr Alloy

Effect of strain rate and temperature on the mechanical behavior of magnesium nanocomposites

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