Developing an industrial-scale ECAP Mg-Al-Zn alloy with multi-heterostructure for synchronously high strength and good ductility

Sun, Jiapeng; Xu, Bingqian; Yang, Zhen; Zhuo, Xiaoru; Han, Jing; Wu, Yuna; Song, Dandan; Liu, Huan; Jiang, Jinghua; Ma, Aibin

doi:10.1016/j.matchar.2020.110341

Cited by 39 publications

(14 citation statements)

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“…The present used combined processing route brings into a multiheterostructured (MH) AZ91 alloy, which was investigated in detail in our previous work [30]. The microstructure of the MH alloy is characterized by a heterogeneous grain structure and a heterogeneous precipitate structure, as shown in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

“…Finally, the ECAPed samples were isothermally aged at 200°C for 15 h, where the peak hardness was obtained. More details on the processing route can be found in our previous work [30], and the resultant sample was designated as "MH alloy. "…”

Section: Methodsmentioning

confidence: 99%

“…%) alloy using hot extrusion and aging, which had a superior strength–ductility balance. In our previous work, the laboratory scale and industrial-scale multiheterostructured AZ91 alloys were prepared via the combined processing route of ECAP and aging [ 30 – 32 ]. The multiheterostructured AZ91 alloy exceeded the known strength and ductility limits of the AZ91 alloy.…”

Section: Introductionmentioning

confidence: 99%

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Wear Behavior of the Multiheterostructured AZ91 Mg Alloy Prepared by ECAP and Aging

Sun

Yang

et al. 2020

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The microstructure design based on the development of heterostructure provides a new way for high strength and ductility Mg alloys. However, the wear property, as an important service performance, of Mg alloys with heterostructure is scarcely investigated. In this work, a high strength and ductility AZ91 Mg alloy with multiheterostructure was prepared via a processing route combined industrial-scale equal channel angular pressing (ECAP) and aging. The multiheterostructure consists of the heterogeneous grain structure and heterogeneous precipitates. The dry sliding wear behavior of this multiheterostructured (MH) alloy is investigated compared to the as-cast alloy. The impacts of the applied load and duration time on the wear volume and coefficient of friction (COF) are analyzed, and the wear mechanism is further discussed. The result indicates that although the MH alloy exhibits high-desirable strength-ductility synergy, it shows a poorer wear resistance but a relatively lower COF compared to the as-cast alloy at the present condition. The wear mechanism of both alloys mainly involves abrasive wear, as well as mild adhesion, delamination, and oxidation. In comparison, the MH alloy shows relatively severe adhesion, delamination, and oxidation. The poor wear resistance of the MH alloy at the present dry sliding wear condition is linked to the abundant grain boundaries and fine precipitates. Therefore, one should reasonably use the MH Mg alloy considering the service conditions to seek advantages and avoid disadvantages.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wear Behavior of the Multiheterostructured AZ91 Mg Alloy Prepared by ECAP and Aging

Sun

Yang

et al. 2020

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“…Comparison of AZT411 alloy in this work with other Mg–Al–Zn–Sn and Mg–Al–Zn‐based alloys (ECAP, [ 28,32–34,55 ] rolling, [ 56–58 ] extruded [ 6,41,59–63 ] ) in studies.…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, high‐strength and ‐ductility magnesium alloys have been fabricated by ECAP, such as Mg–RE alloys, [ 29–31 ] Mg–Al–Zn alloys, [ 32–34 ] Mg–Al–Ca alloys, [ 35 ] and Mg–Zn‐base alloys [ 36,37 ] due to a combination of grain boundary strengthening and precipitation strengthening. [ 30,32 ] Prehomogenization treatment [ 34 ] or semisolid treatment [ 31 ] prior to ECAP processing can obtain smaller grain sizes by facilitating recrystallization and hindering the growth of recrystallized grains. Moreover, the combination of ECAP with extrusion can produce Mg alloys showing enhanced mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Mechanical Properties of Mg–Al–Zn–Sn–Mn Alloy by Multipass Equal Channel Angular Pressing

et al. 2020

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Herein, the influence of equal channel angular pressing (ECAP) routes, i.e., A and Bc, on the microstructure and texture evolution of a Mg–3.7Al–0.7Zn–0.8Sn–0.4Mn (wt%) alloy is investigated by scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and X‐ray diffraction (XRD). It is found that with increasing the number of ECAP passes, the area fraction of the dynamically precipitated secondary‐phase particles increases, whereas particle size becomes larger. After four and six passes of ECAP via route A, shear deformation induced by ECAP promotes the incline of c‐axes toward extrusion direction (ED). The optimum room temperature (RT) mechanical properties (yield strength of ≈225 MPa, ultimate tensile strength of ≈312 MPa, and elongation to fracture of ≈31.9%) are obtained after four passes of ECAP at 200 °C via route A. The improved strength results from fine dynamic recrystallization (DRX)/ed grains, nanoscale secondary‐phase particles, and basal texture. Herein, it is indicated that Mg–Al–Zn–Sn alloys have great potential as low‐cost high‐strength‐ductility wrought Mg alloys.

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Correlation Between Microstructure, Mechanical Properties, and Corrosion Characteristics of AZ31 Mg Alloy Processed by Accumulative Roll Bonding Process

Samiei

Dini

Ebrahimian-Hosseinabadi

2022

Met. Mater. Int.

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Developing an industrial-scale ECAP Mg-Al-Zn alloy with multi-heterostructure for synchronously high strength and good ductility

Cited by 39 publications

References 44 publications

Wear Behavior of the Multiheterostructured AZ91 Mg Alloy Prepared by ECAP and Aging

Wear Behavior of the Multiheterostructured AZ91 Mg Alloy Prepared by ECAP and Aging

Tailoring Mechanical Properties of Mg–Al–Zn–Sn–Mn Alloy by Multipass Equal Channel Angular Pressing

Correlation Between Microstructure, Mechanical Properties, and Corrosion Characteristics of AZ31 Mg Alloy Processed by Accumulative Roll Bonding Process

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