High-Strength AZ91 Alloy Fabricated by Rapidly Solidified Flaky Powder Metallurgy and Hot Extrusion

Lee, Taekyung; Yamasaki, Michiaki; Kawamura, Yoshihito; Go, Jongbin; Park, Sung Hyuk

doi:10.1007/s12540-018-0204-6

Cited by 23 publications

(6 citation statements)

References 31 publications

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“…These results suggest that the caliber rolling process, rather than the alloying compositions, induced the split basal texture in the investigated Mg alloys. The split texture is an exclusive feature of the caliber-rolled Mg alloys, which is different from the basal texture of the rolled alloys [30] or the ring fiber texture of the extruded alloys [8,22,31]. Recently, Kwak et al [18] elucidated the unique plastic anisotropic behavior of a caliber-rolled ZK60 Mg alloy possessing a split texture.…”

Section: Discussionmentioning

confidence: 99%

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Microstructural Evolution of Multi-Pass Caliber-Rolled Mg–Sn and Mg–Sn–Mn Alloys

Liao

Lee

et al. 2020

Metals

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Multi-pass caliber rolling has proven its vast potential for ultrafine-scale grain refinement and mass production of various metals. Nevertheless, the studies related to Mg alloys have primarily focused only on a few commercial materials, such as AZ31 and ZK60 Mg alloys. This is the first study to investigate caliber-rolled Mg–1Sn (TM10) and Mg–1Sn–1Mn (TM11) alloys. Specifically, this work aims to elucidate the microstructural characteristics of these alloys, including grain refinement, recrystallization, and texture development. Such features were discussed from the viewpoints of alloying effects (i.e., Sn and Mn) and mechanical effects (i.e., caliber-rolling strains). The combination of the addition of Mn and high-redundant strain results in effective grain refinement of the caliber-rolled TM11 Mg alloys. In addition, both TM10 and TM11 Mg alloys exhibit a unique split basal texture, wherein the basal poles are tilted in the plane normal to the rolling direction.

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Section: Discussionmentioning

confidence: 99%

“…The other approach is to tailor the microstructure of commercial Mg alloys. Careful design of the thermomechanical processing route induces an optimized microstructural evolution and a resultant improvement in their mechanical properties [6][7][8][9]. A severe plastic deformation (SPD) process has been developed based on this approach.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution of Multi-Pass Caliber-Rolled Mg–Sn and Mg–Sn–Mn Alloys

Liao

Lee

et al. 2020

Metals

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“…A theoretical model of the influence of fine grain strengthening on YS can be expressed by the Hall-Petch formula, which is estimated by the following equation [6]:…”

Section: Reinforcement Mechanismsmentioning

confidence: 99%

“…Magnesium alloys offer significant advantages over aluminum alloys due to their light weight [1][2][3][4][5][6], high specific strength [7][8][9], and easy recovery [10,11], making them increasingly popular in fields such as automotive parts and electronic devices [12][13][14][15][16]. Due to their good machinability, the demand for magnesium alloys is increasing, resulting in a large amount of machining chips.…”

Section: Introductionmentioning

confidence: 99%

Solid-State Synthesis of SiC Particle-Reinforced AZ91D Composites: Microstructure and Reinforcement Mechanisms

Shi,

Cui,

et al. 2024

Metals

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Safe and efficient recycling of industrially generated machined chips is a high-priority technological issue. In this study, the effect of SiC particles (SiCp) on the microstructure and mechanical properties of SiCp/AZ91D composites is systematically analyzed, and the reinforcement mechanism of SiCp on composites is investigated. Different contents of SiCp/AZ91D composites are fabricated by solid-state synthesis. The results show that the incorporation of SiCp refined the grains of SiCp/AZ91D composites, which is related to the uniform distribution of SiCp at the grain boundaries. The strong bonding of SiCp with the AZ91D matrix inhibited the generation and extension of cracks, which led to the simultaneous increase in the yield strength (YS) and elongation (EL) of the SiCp/AZ91D composites. The mechanical properties of the 3 wt.% SiCp/AZ91D composites are the most superior, with an average grain size, Vickers hardness, ultimate tensile strength (UTS), YS, and EL of 6.69 ± 4.48 μm, 89.5 ± 2.5 HV, 341 ± 11 MPa, 172 ± 8 MPa, and 4.43 ± 0.18%, respectively. The reinforcement mechanisms of SiCp/AZ91D composites are mainly grain refinement and dislocation strengthening. Solid-state synthesis is an effective method for recycling magnesium alloy chips.

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“…There have been many strategies proposed for refining the coarse as-cast microstructure in wrought Mg-alloys. A variety of these strategies range from the traditional use of chemical agents such as Zr [ 75 ] to thermomechanical treatment controlling dynamic recrystallization [ 76 , 77 , 78 , 79 , 80 ], rapid solidification [ 81 ], lased additive manufacturing [ 82 ], powder metallurgy [ 18 , 83 ], and surface treatment by mechanical attrition [ 84 ] or intense ultrasonic treatment [ 85 ].…”

Section: Mechanical Properties Of Mg-zn-ca Alloysmentioning

confidence: 99%

Attaining High Functional Performance in Biodegradable Mg-Alloys: An Overview of Challenges and Prospects for the Mg-Zn-Ca System

et al. 2023

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This article presents a concise overview of modern achievements and existing knowledge gaps in the area of biodegradable magnesium alloys. Hundreds of Mg-based alloys have been proposed as candidates for temporary implants, and this number tends to increase day by day. Therefore, while reviewing common aspects of research in this field, we confine ourselves primarily to the popular Mg-Zn-Ca system, taken as a representative example. Over the last decades, research activities in this area have grown enormously and have produced many exciting results. Aiming at highlighting the areas where research efforts are still scarce, we review the state-of-the-art processing techniques and summarize the functional properties attained via a wide variety of processing routes devised towards achieving a desired properties profile, including the mechanical response in terms of strength, ductility, and fatigue resistance paired with biocompatibility and bio-corrosion resistance or controlled degradability. We pay keen attention to a summary of corrosion properties and mechano-chemical interactions between an aggressive environment and loaded Mg-based structures, resulting in stress corrosion cracking and premature corrosion fatigue failures. The polemic issues and challenges practitioners face in their laboratory research are identified and discussed.

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High-Strength AZ91 Alloy Fabricated by Rapidly Solidified Flaky Powder Metallurgy and Hot Extrusion

Cited by 23 publications

References 31 publications

Microstructural Evolution of Multi-Pass Caliber-Rolled Mg–Sn and Mg–Sn–Mn Alloys

Microstructural Evolution of Multi-Pass Caliber-Rolled Mg–Sn and Mg–Sn–Mn Alloys

Solid-State Synthesis of SiC Particle-Reinforced AZ91D Composites: Microstructure and Reinforcement Mechanisms

Attaining High Functional Performance in Biodegradable Mg-Alloys: An Overview of Challenges and Prospects for the Mg-Zn-Ca System

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