Creep and Fracture Behavior of Peak-Aged Mg-11Y-5Gd-2Zn-0.5Zr (wt pct)

Yin, Dongdi; Wang, Q. D.; Boehlert, C. J.; Janík, Vít

doi:10.1007/s11661-012-1131-7

Cited by 32 publications

(4 citation statements)

References 55 publications

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“…In recent decades, newly developed Mg-Gd-Y alloys have received extensive interests due to their ultrahigh strength both at room and elevated temperatures [1][2][3], better creep resistance than WE54 alloy [4] and even being better than some conventional Al alloys [5]. However, most of these researches mainly focus on extrusion [2,6] and rolling processes [7,8].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Recrystallization and Texture Evolution of GW94 Mg Alloy During Multi- and Unidirectional Impact Forging

Shah

Jiang

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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Multi-and unidirectional impact forgings were successfully applied to a (GW94) Mg-RE alloy. The microstructure and texture evolution were investigated systematically. The obtained results indicated that during unidirectional impact forging, a bimodal chain deform microstructure was sustained till last forging pass, whereas {10-12} extension twins-assisted continuous dynamic recrystallization took place during the multidirectional impact forging (MDIF). The coalescence and intersection of {10-12} extension twins during MDIF efficiently refined the original coarse grains and led to an almost recrystallized homogeneous microstructure. The texture analysis demonstrated that unidirectional impact forging yielded out the strong basal texture; however, MDIF resulted in non-basal texture, which was attributed to the cooperative effects of continuous DRX, twinning, and MDIF itself during the deformation process.

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Section: Introductionmentioning

confidence: 99%

Dynamic Recrystallization and Texture Evolution of GW94 Mg Alloy During Multi- and Unidirectional Impact Forging

Shah

Jiang

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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“…According to corresponding fast Fourier transformation (FFT) patterns of the red dotted box in Figure 7a (Figure 7b), the fine β′ phase (Mg 7 Gd) with a body‐centered orthorhombic structure ( a = 0.640 nm, b = 2.223 nm, and c = 0.521 nm) was detected. [ 10,34,35 ] The β′ phases formed on the prismatic planes of the matrix with a dense triangular arrangement provide not only most effective barriers to the motion of basal dislocation motion but are also very effective against creep deformation. [ 36,37 ] However, β′ phases are not stable at elevated temperatures.…”

Section: Resultsmentioning

confidence: 99%

Tensile Creep Behavior and Microstructure Evolution of As‐Cast Mg–9.82Gd–0.38Zr Alloy at 250 °C

Qin

Yang

Zhang

et al. 2021

Physica Status Solidi (a)

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Herein the tensile creep behavior and microstructure evolution of an as‐cast Mg–9.82Gd–0.38Zr alloy under different stresses at 250 °C are investigated. The results of creep test show that the creep strain and steady creep rate increase with the creep stress at 250 °C. The fitted stress exponent n value (4.4) and transmission electron microscopy analysis suggest that the steady creep is dominated by the dislocation climb and glide mechanisms together. At the primary stage, due to the segregation of the Gd content, a fine‐strengthening β′ phase precipitates near the α‐Mg grain boundary. Then the transformation of β′ precipitates to a needle‐like β phase, coarsening, and growth of the β phase toward the intragranular direction gradually deteriorate the creep resistance of the experimental alloy. Moreover, two kinds of precipitate‐free zones (PFZs) appear at the end of the secondary creep stage and the PFZs nearly perpendicular to the applied stress direction widen gradually because of the directional diffusion. The nucleation and propagation of creep crack along the cracked eutectic phase and PFZs lead to the greatly rising creep rate at the end of the tertiary creep stage, which eventually results in the intergranular creep fracture of the experimental alloy.

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“…Zinc helps to improve ductility and strength particularly at high temperature [6]. ZE41 Mg alloy is an attractive material because of its superior mechanical properties [7]. However, considerable investigations have been carried out on the effect of R.E, Zr and Zn on the mechanical properties of Mg alloy.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Wear Behavior of the ZE41 Mg Alloy

Chiranth¹,

Siddaraju

Mishra

et al. 2019

MSF

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High-temperature wear and friction properties of ZE41 alloy were evaluated using a pin on disc tribometer. The microstructure of the alloy has the equiaxed grains of 72±20µm decorated with the rare earth rich precipitates. Result shows that wear rate decreases upto 100°C and then increases until 250°C for all the loading conditions. The wear mechanism study revealed that the underlying thin oxide tribolayer minimizes the wear rate upto 100°C. Above 100°C, thickening of oxide layer due to enhanced oxidation rate results in breakage of the layer. Further, the increase of temperature softens the alloy which deforms and fractures in the subsurface at low critical load resulting in more delamination wear. The combined effects of oxidation and delamination wear are accentuated with the increase of load and temperature resulting in the increase of the wear rate. Comparing the influence of load and temperature on the wear rate, contact load is more.

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Creep and Fracture Behavior of Peak-Aged Mg-11Y-5Gd-2Zn-0.5Zr (wt pct)

Cited by 32 publications

References 55 publications

Dynamic Recrystallization and Texture Evolution of GW94 Mg Alloy During Multi- and Unidirectional Impact Forging

Dynamic Recrystallization and Texture Evolution of GW94 Mg Alloy During Multi- and Unidirectional Impact Forging

Tensile Creep Behavior and Microstructure Evolution of As‐Cast Mg–9.82Gd–0.38Zr Alloy at 250 °C

High-Temperature Wear Behavior of the ZE41 Mg Alloy

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