The Recent Research on Properties of Anti-High Temperature Creep of AZ91 Magnesium Alloy

Ai, Xiulan; Quan, Gaofeng

doi:10.5772/13392

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…The current trend in the powder coating industry is low temperature, including UV-cured systems (cured at 160 • C and below) [31][32][33][34][35]. This is an important aspect with respect to the reduction in production costs, environmental impact, and the possibility of using powder coatings on highly sensitive materials, such as wood [36] or the magnesium alloy of the AZ series, which lose their mechanical properties at elevated temperatures [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Duplex PEO/UV-Curable Powder Coating on AZ91 Magnesium Alloys

Florczak,

Pojnar,

Kościelniak

et al. 2024

Metals

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Magnesium alloys, because of their excellent strength-to-weight ratio, are increasingly used in many industries. When used in external elements, the key factor is to provide adequate anticorrosion protection. High-temperature, cured-powder coatings are widely used to protect most metals, but their use on magnesium alloys is difficult as a result of the instability of the magnesium substrate at elevated temperatures. Another problem is ensuring the proper adhesion of the organic coating to the magnesium substrate. This paper presents the procedure for the synthesis of a duplex coating on AZ91 magnesium alloy. The topcoat was a powder coating based on acrylic resin, the main ingredient of which was glycidyl methacrylate. Because of the presence of epoxy groups, the coating was cured using ultraviolet (UV) radiation (low-temperature technology). The conversion subcoating was produced by plasma electrolytic oxidation (PEO) in an alkaline silicate electrolyte. The synthesized coating system was tested, among others, for microscopic (SEM), adhesive (mesh of cuts), and anticorrosion (EIS). The duplex PEO/UV-curable powder coating showed very good adhesion to the metal and increased the anticorrosion properties of the magnesium substrate, compared to the powder coating produced directly on the magnesium alloy and on an alternative conversion coating (synthesized in the process of chemical zircon phosphating).

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Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Duplex PEO/UV-Curable Powder Coating on AZ91 Magnesium Alloys

Florczak,

Pojnar,

Kościelniak

et al. 2024

Metals

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“…Initially, magnesium alloys have been developed for die-cast components, the most popular one being AZ91 [1,2]. Since creep resistance has been a limiting factor in their application [3], addition of rare earth elements has been attempted to develop alloys like AE42 [4] and WGZ1152 [5]. More recently, Ca addition has been found to be effective in improving the creep strength, as demonstrated in Mg-Sn-Ca alloys, the preferred one being Mg-3Sn-2Ca (TX32) [6].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Dynamic Recrystallization and Evolution of Texture in the Hot Working Domains of the Processing Map for Mg-4Al-2Ba-2Ca Alloy

Suresh

Rao

Prasad³

et al. 2017

Metals

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Abstract:The occurrence of dynamic recrystallization (DRX) and its effect on the evolution of texture during uniaxial compression of a creep-resistant cast Mg-4Al-2Ba-2Ca alloy in the temperature range of 260-500 • C and strain rate range of 0.0003-10 s −1 has been studied using transmission electron microscopy and electron backscatter diffraction techniques with a view to understand its mechanism. For this purpose, a processing map has been developed for this alloy, which revealed two domains of DRX in the temperature and strain rate ranges of: (1) 300-390 • C/0.0003-0.001 s −1 and (2) 400-500 • C/0.0003-0.5 s −1 . In Domain 1, DRX occurs by basal slip and recovery by dislocation climb, as indicated by the presence of planar slip bands and high dislocation density leading to tilt boundary formation and a low-intensity basal texture. On the other hand, DRX in Domain 2 occurs by second order pyramidal slip and recovery by cross-slip since the microstructure revealed tangled dislocation structure with twist boundaries and randomized texture. The high volume content of intermetallic phases Mg 21 Al 3 Ba 2 and (Al,Mg) 2 Ca eutectic phase is considered to be responsible for the observed hot deformation behavior.

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The Recent Research on Properties of Anti-High Temperature Creep of AZ91 Magnesium Alloy

Cited by 2 publications

References 25 publications

Preparation and Characterization of Duplex PEO/UV-Curable Powder Coating on AZ91 Magnesium Alloys

Preparation and Characterization of Duplex PEO/UV-Curable Powder Coating on AZ91 Magnesium Alloys

Mechanism of Dynamic Recrystallization and Evolution of Texture in the Hot Working Domains of the Processing Map for Mg-4Al-2Ba-2Ca Alloy

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