Effect of Aging Treatment on the Precipitation Behavior and Mechanical Properties of Mg-9Gd-3Y-1.5Zn-0.5Zr Alloy

Zhang, Xue; Ren, Yuejuan; Luo, Wenbo; Zheng, Ruipeng; Xu, Chao

doi:10.1007/s11665-017-2755-y

Cited by 33 publications

(7 citation statements)

References 20 publications

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“…Apparently, this aging treatment drives the composition homogenization of the growth texture and further promotes the fusion of micro-cracks between the matrix and the eutectic phase. According to the previous literature [9,32], the precipitation process of the aged M2 material likely obeys to this evolution of (SSSS) → β → β . Figure 4 presents the nanoindentation characterization results of all materials.…”

Section: Resultsmentioning

confidence: 67%

“…Therefore, this strong synergistic strengthening effect of grain refinement, solid solution, and second phase eventually leads to a slight enhancement in the hardness and modulus of material M2 [35]. According to the previous literature [9,36], the formation of β phase is also expected to benefit the mechanical property improvement of material M2. The wear track profiles of all fabricated materials are displayed in Figure 6.…”

Section: Resultsmentioning

confidence: 86%

“…Moreover, the Zn and Zr elements are usually added to the Mg-Gd-Y system alloys. The addition of Zn to Mg-RE (RE = Gd or Y)-(Zr) alloys produces the formation of a novel long-period stacking ordered (LPSO) structure, which plays a key role in enhancing the mechanical property of magnesium alloy [7][8][9][10]. The Zr element doping can significantly refine the grain size of magnesium alloys due to the uniform distribution of Zr, and further promotes the heterogeneous nucleation process of the magnesium matrix [11].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Mechanical and Anti-Wear Properties of Magnesium by Alloying and Subsequent Extrusion–Aging Treatment

Guo

et al. 2022

Coatings

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In this work, the microstructure, mechanical, and anti-wear properties of the alloyed-extruded-aged Mg-8.3Gd-4.5Y-1.4Zn-0.3Zr (wt%) alloys were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), nanoindentation, and wear tests. Results showed that the alloying—extrusion processing induced a significant grain refinement of magnesium resulting in the formation of bulk Mg24(GdYZn)5 at the grain boundaries. The grain size decreased from 116 μm in pure magnesium to 17 μm in alloyed-extruded magnesium, while the grain refinement, solid solution and second phase strengthening led to a hardness enhancement from 0.67 GPa in pure magnesium to 1.64 GPa in alloyed-extruded magnesium. Aging treatment further drove the structural homogenization of the alloyed-extruded magnesium resulting in an enhanced hardness of 1.83 GPa. During the sliding wear tests, a large-area plastic deformation layer formed on the wear track surface of pure magnesium, leading to an unstable friction coefficient and a high wear rate of 2.64 × 10−3 mm3·N−1·m−1. The alloying—extrusion—aging treatments effectively inhibited the formation of the plastic deformation layer. The wear rate of the alloyed-extruded material decreased to 1.60 × 10−3 mm3·N−1·m−1. In contrast, the alloyed-extruded-aged material showed a lower wear rate of 1.16 × 10−3 mm3·N−1·m−1. The wear failure mechanisms of all fabricated materials were further discussed according to the characterization results.

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Section: Resultsmentioning

confidence: 67%

Section: Resultsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Enhanced Mechanical and Anti-Wear Properties of Magnesium by Alloying and Subsequent Extrusion–Aging Treatment

Guo

et al. 2022

Coatings

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“…It is well-known that the Zn element can effectively improve the precipitation response of Mg-Gd-Zn alloys [18]. The β phase forms during the aging treatment with mediate holding time in Mg-Gd (-Y)-Zn series alloys [14,19,20]. The formation of the β phase is also discussed in detail in the aging treatment process.…”

Section: The β 1 and β Phase Transformationmentioning

confidence: 99%

“…The β 1 phase is one of the families of intermetallic compounds Mg 3 X, which is an impressive strengthening phase in Mg-RE-Zn alloys [13]. It usually forms via solid-phase transformation during the aging treatment process, with a long holding-time at 200-250 • C [14]. In specific Mg-RE (Gd, Y)-Zn alloys, the β 1 phase can be formed from the molten liquid at a certain solidification process, and the size is usually smaller than that of the equilibrium β phase.…”

Section: The β 1 and β Phase Transformationmentioning

confidence: 99%

Microstructure Evolution of Mg96.9Gd2.7Zn0.4 Alloy Containing Multiple Phases Prepared by Spark Plasma Sintering Method

Zhang

Han

Luo

et al. 2020

Metals

Self Cite

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The synergic strengthening of multiple phases is an essential way to achieve high-performance Mg alloys. Herein, Mg-Gd-Zn alloy containing four phases was prepared by rapid solidification (RS) ribbons and spark plasma sintering (SPS). The microstructure of the alloy consisted of α-Mg, nanosized β1 phase particles, lamellar long period stacking ordered (LPSO) phase, and β′ phase precipitates. The microstructural evolution was also investigated. The results show that the metastable β1 phase was formed in the as-cast solidification through rapid solidification, because both Zn atoms and the short holding-time at molten liquid facilitated the formation of the β1 phase. The β1 phase grew from 35.6 to 154 nm during the sintering process. Meanwhile, the fine lamellar LPSO phase was simultaneously formed after the Zn-Gd clusters were generated from the supersaturated solid solution, and the width of the LPSO phase was only in the range of 2–30 nm. The third strengthening phase, the metastable β′ phase, was obtained by aging treatment. The results of hardness testing implied that the hardness of the alloy containing the aforementioned three nanosized strengthening phases significantly improved about 47% to 126 HV compared with that of the as-cast ingot.

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Mechanical Properties of the Mg-Gd-Y-Zn-Zr Alloys with Different Morphologies of Long-Period Stacking Ordered Phases

Zhou

Liu

Gao

et al. 2018

J. of Materi Eng and Perform

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Effect of Aging Treatment on the Precipitation Behavior and Mechanical Properties of Mg-9Gd-3Y-1.5Zn-0.5Zr Alloy

Cited by 33 publications

References 20 publications

Enhanced Mechanical and Anti-Wear Properties of Magnesium by Alloying and Subsequent Extrusion–Aging Treatment

Enhanced Mechanical and Anti-Wear Properties of Magnesium by Alloying and Subsequent Extrusion–Aging Treatment

Microstructure Evolution of Mg96.9Gd2.7Zn0.4 Alloy Containing Multiple Phases Prepared by Spark Plasma Sintering Method

Mechanical Properties of the Mg-Gd-Y-Zn-Zr Alloys with Different Morphologies of Long-Period Stacking Ordered Phases

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