Superplastic forming of magnesium alloys

Grimes, Roger

doi:10.1533/9780857092779.3.304

Cited by 8 publications

(4 citation statements)

References 31 publications

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“…This behaviour can be attributed to the alloying elements in the alloy composition. WE43 Mg alloy contains some rare elements, e.g., yttrium (Y), neodymium (Nd), and gadolinium (Gd), which inhibit the movement of grain boundaries through the Zener pinning effect, whereby has a strong influence on recovery, recrystallization, and grain growth (40). Besides, new grains are preferably nucleated near the initial grain boundaries that can be ascribed to the strain-induced boundary migration (41).…”

Section: Discussionmentioning

confidence: 99%

Study of Hydroxyapatite-coated High-strength Biodegradable Magnesium-based Alloy in Repairing Fracture Damage in Rats

Zhang²,

Dong³

et al. 2023

In Vivo

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Background/Aim: Hydroxyapatite (HA) coating can improve the degradation rate and biological activity of metallic implants. This study aimed to fabricate a hydroxyapatite-coated ultrafine-grained biodegradable WE43 magnesium (HA/UFG-WE43 Mg) implant for repairing bone fractures. Materials and Methods: A hybrid approach, including parallel tubular-channel angular pressing (PTCAP) and physical vapour deposition (PVD) magnetron sputtering, was employed. The HA/UFG-WE43 Mg samples were tested in terms of their physicochemical and biological properties. Results: The processed tubes exhibited ultrafine structures and the uniformity of microstructures improved following the two-pass PTCAP. The phase composition of the coating formed on UFG-WE43 Mg implant at 250 W for 90 min after heat treatment at 500˚C for 60 min confirmed the presence of the HA characteristic peaks. Rat skeletal muscle cells were inoculated on the specimens and cultured for 1, 2, 6, 12, and 24 h, followed by evaluation of cell adhesion and morphology. The growth rates of cells were examined by the Cell Counting Kit8 (CCK-8) and cell survival was observed after 3 days of culture by fluorescence microscopy. The concentration of Mg ions in the blood of rats on 1, 3, 5, 7, and 15 days showed a reduction in Mg concentration after deposition of HA. Conclusion: Combination of PTCAP processing followed by surface modification led to tibial fracture healing, and histological analysis of implanted areas demonstrated an efficient biodegradation of the implanted material and a moderate inflammatory reaction.

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Section: Discussionmentioning

confidence: 99%

Study of Hydroxyapatite-coated High-strength Biodegradable Magnesium-based Alloy in Repairing Fracture Damage in Rats

Zhang²,

Dong³

et al. 2023

In Vivo

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“…Furthermore, to reach very high elongations, these materials must be deformed at high temperatures (T > 0.5 T f with T f absolute melting temperature of the material) that must be kept constant during the forming process and at low strain rates (between 10 −3 and 10 −5 s −1 ) [1,2]. Industrially interesting superplastic materials are aluminum-based [3], titanium-based [4], and magnesium-based alloys [5].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Initial Blank Geometry on the Final Thickness Distribution of the Hemispheres in Superplastic AZ31 Alloy

Giuliano

Polini

2022

Applied Sciences

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This work deals with the design of the thickness of an AZ31 alloy blank, which is a superplastic magnesium material, to manufacture a hemisphere with a uniform final thickness. The finite element technique was used for the design process. The superplastic free-forming manufacturing was simulated for a part whose initial thicknesses were made to vary through two independent design parameters to obtain a linear thickness decrease from the pole to the end of the blank to form. This is because a linear thickness decrease is easily obtained through a machining process. The optimized blank, that is, the blank with a non-constant thickness that leads to the most uniform thickness distribution of the formed product, allows the manufacturing of a hemisphere with more uniform thickness values with a reduction in forming times and in weight in comparison with that formed by a constant initial thickness blank. At the same time, experimental tests confirmed the results highlighted by the finite element technique.

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“…Successful trials have been conducted to produce door panels from superplastically formed AZ31 for the niche and exotic vehicles [23]. Superplastic parts of AZ31 alloy also possess great appeal for utilization in the aerospace sector.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Superplastic Behaviour in Double-Pass Friction Stir Processed Mg-Al-Zn Alloy

HARWANI¹

2022

SSRN Journal

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Superplastic forming of magnesium alloys

Cited by 8 publications

References 31 publications

Study of Hydroxyapatite-coated High-strength Biodegradable Magnesium-based Alloy in Repairing Fracture Damage in Rats

Study of Hydroxyapatite-coated High-strength Biodegradable Magnesium-based Alloy in Repairing Fracture Damage in Rats

Influence of the Initial Blank Geometry on the Final Thickness Distribution of the Hemispheres in Superplastic AZ31 Alloy

Investigation of Superplastic Behaviour in Double-Pass Friction Stir Processed Mg-Al-Zn Alloy

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