Microstructure evolution during superplastic deformation process and its impact on superplastic behavior of a Mg-Gd-Y-Zn-Zr alloy

Sun, Chao; Liu, Huan; Wang, Xiaojun; Hu, Xiaoyang; Jiang, Shanhu

doi:10.1016/j.matchar.2021.110879

Cited by 22 publications

(8 citation statements)

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“…The grain boundary sliding (GBS) phenomen be the governing deformation mechanism. Sun et al [22] reported an el Figure 1. The statistical graph of grain size and m-value of given alloys [14][15][16][17][18] (the grain size of ZK30 Mg alloy was 1-5 µm and 30 µm; however, for the graphical presentation, we use an average of 2.5 µm).…”

Section: Elongation To Fracture and Deformation Mechanismmentioning

confidence: 99%

“…The grain boundary sliding (GBS) phenomenon is reported to be the governing deformation mechanism. Sun et al [22] reported an elongation to fracture of 972% in an Mg-Gd-Y-Zn-Zr alloy at a relatively low strain rate of 0.0005 s −1 under a high temperature of 450 • C, and they also proposed that GBS assisted by grain boundary diffusion is the dominant deformation mechanism during elevated temperature loading.…”

Section: Elongation To Fracture and Deformation Mechanismmentioning

confidence: 99%

“…Similarly, a binary Mg-Gd alloy was prepared by Cizek et al [40], who showed that the Mg-5Gd particles were supportive of impeding the grain size. However, in ternary alloys or higher incorporated metal alloys, such as brittle Mg 24 Y 5 , this resulted in Mg-Gd-Y-Zn-Zr being thermally stable at a temperature of 450 • C, resisting grain growth and facilitating superplasticity [22].…”

Section: Thermal Stability and Q-valuementioning

confidence: 99%

“…Similarly, Yang et al [45] proposed that the texture was highly influenced and became weaker during deformation at elevated temperatures. In another study [22], a random texture of Mg-Gd-Y-Zn-Zr alloy was altered to the extruded fiber texture under high-temperature loading. Therefore, after a brief analysis, it is concluded that:  During high temperature and high strain rate loading, dynamic recrystallization weakens the texture;  Texture effect is strain rate, temperature and exposure-time dependent;  During high-temperature loading, in the early stages of deformation, the <c + a> slip activity alters the texture, which promotes the GBS phenomenon.…”

Section: Texture Evolutionmentioning

confidence: 99%

Section: Texture Evolutionmentioning

confidence: 99%

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Microstructure Features and Superplasticity of Extruded, Rolled and SPD-Processed Magnesium Alloys: A Short Review

Malik

Chaudry

Hamad

et al. 2021

Metals

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In this study, an overview of microstructure features such as grain size, grain structure, texture and its impact on strain rate sensitivity, strain hardening index, activation energy and thermal stability for achieving superplasticity of Mg alloys are presented. The deformation behavior under different strain rates and temperatures was also elaborated. For high elongation to fracture grain boundary sliding, grain boundary diffusion is the dominant deformation mechanism. In contrast, for low-temperature and high strain rate superplasticity, grain boundary sliding and solute drag creep mechanism or viscous glide dislocation followed by GBS are the dominant deformations. In addition, the results of different studies were compared, and optimal strain rate and temperature were diagnosed for achieving excellent high strain rate superplasticity.

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Section: Elongation To Fracture and Deformation Mechanismmentioning

confidence: 99%

Section: Elongation To Fracture and Deformation Mechanismmentioning

confidence: 99%

Section: Thermal Stability and Q-valuementioning

confidence: 99%

Section: Texture Evolutionmentioning

confidence: 99%

Section: Texture Evolutionmentioning

confidence: 99%

See 3 more Smart Citations

Microstructure Features and Superplasticity of Extruded, Rolled and SPD-Processed Magnesium Alloys: A Short Review

Malik

Chaudry

Hamad

et al. 2021

Metals

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Investigation on the Mechanical and Corrosion Properties of ZnMnSr Alloys for Biodegradable Orthopedic Implants

et al. 2022

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Zinc‐based alloys with good biocompatibility and corrosion resistance are potential candidates for bioabsorbable implants. Herein, a series of Zn99−x Mn x Sr1 (x = 0.2, 0.3, 0.5, and 0.9 wt%) alloys are investigated using single‐channel vertical extrusion (SCVE) and equal‐channel angular pressing (ECAP) procedures, respectively. It is found that the amount of Mn significantly affects the mechanical properties of alloys. For example, the yield strength, tensile strength, and elongation of Zn–1Sr alloys can reach up to 204.73 ± 3.6 MPa, 244.04 ± 6.45 MPa, and 47.1 ± 3% with 0.99 wt% Mn addition after the SCVE process, which can meet the requirement of orthopedic implant applications. Moreover, the mechanical properties of current alloys are reduced with the combined SCVE + ECAP process, which may be due to more aggregation with the secondary phase within the matrix hcp(Zn). Furthermore, the polarization curves and immersion tests show that the corrosion rate is accelerated for the alloys processed with the combined SCVE + ECAP process (0.34–0.171 mm/y) compared with the ones processed only with SCVE (0.011–0.032 mm/y). The present finds provide a contribution for biodegradable Zn‐based alloys development.

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Microstructure-Superplastic Properties Relationship and Deformation Mechanism in a Novel Dual-Phase Medium Mn Steel: The Effect of Microstructure Anisotropy and Texture

Pan,

Wei,

Zhang

et al. 2024

Metall Mater Trans A

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Microstructure evolution during superplastic deformation process and its impact on superplastic behavior of a Mg-Gd-Y-Zn-Zr alloy

Cited by 22 publications

References 50 publications

Microstructure Features and Superplasticity of Extruded, Rolled and SPD-Processed Magnesium Alloys: A Short Review

Microstructure Features and Superplasticity of Extruded, Rolled and SPD-Processed Magnesium Alloys: A Short Review

Investigation on the Mechanical and Corrosion Properties of ZnMnSr Alloys for Biodegradable Orthopedic Implants

Microstructure-Superplastic Properties Relationship and Deformation Mechanism in a Novel Dual-Phase Medium Mn Steel: The Effect of Microstructure Anisotropy and Texture

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