Calculated phase diagrams, iron tolerance limits, and corrosion of Mg-Al alloys

Liu, Ming; Uggowitzer, Peter J.; Schmutz, Patrik; Atrens, Andrej

doi:10.1007/s11837-008-0164-2

Cited by 46 publications

(15 citation statements)

References 65 publications

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“…The solubility of Fe in liquid did not change with the Mg content in the Mg-Fe binary alloy. However, the solubility of Fe in liquid dramatically decreased with an increase in the Mg content in the Mg-3.05Al-0.8775Zn-0.35Mn-Fe alloy, which resulted from the addition of Mn, as reported in previous studies [8][9][10][11]. Although the solubility of Fe in liquid decreased remarkably with the addition of Mn, the solubility of Fe in liquid was much higher than the Fe content in the raw material.…”

Section: Methodssupporting

confidence: 69%

Effects of processing variables on melt cleanliness of AZ31B magnesium alloy investigated by quantitative evaluation of Fe and non-metallic inclusions

2010

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Impurities such as Fe, Ni and Cu and non-metallic inclusions such as oxides, nitrides, carbides, sulfides and fluorides are harmful to the quality and various properties of magnesium alloy sheets produced by twinroll casting. In this study, the changes of the content of Fe and non-metallic inclusions in AZ31B magnesium alloys with melt temperature and isothermal holding time were quantitatively evaluated using EPMA and the metallographic method. The Fe content did not increase above the Fe content in the raw material, which implies that the dissolution of Fe from a steel crucible was suppressed effectively. The content of non-metallic inclusions, mainly consisting of oxide, fluoride and Fe-rich intermetallic compounds, did not change remarkably with the melt temperature but it increased with the isothermal holding time due to the continuous oxidation of the magnesium alloy melt on the melt surface.

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Section: Methodssupporting

confidence: 69%

Effects of processing variables on melt cleanliness of AZ31B magnesium alloy investigated by quantitative evaluation of Fe and non-metallic inclusions

2010

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“…Assessment of their intrinsic corrosion behavior requires ultra‐high purity Mg‐X alloy production (it was not possible previously to produce these in ultra high purity form) and solution heat treatment so that all the alloying elements are in solid solution. The measured corrosion rate is high, and the corrosion behavior is masked by a Fe impurity concentration above the Fe tolerance limit, because the corrosion behavior is dominated by the presence of Fe rich particles. The corrosion rate also depends on the Mn and Si contents as these can increase the quantity of the deleterious Fe‐rich particles as shown by Uggowitzer and co‐ workers .…”

Section: Materials Influencesmentioning

confidence: 99%

Review of Recent Developments in the Field of Magnesium Corrosion

et al. 2015

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This paper provides a review of recent developments in the field of Mg corrosion and puts those into context. This includes considerations of corrosion manifestations, material influences, surface treatment, anodization, coatings, inhibition, biodegradable medical applications, stress corrosion cracking, flammability, corrosion mechanisms for HP Mg, critical evaluation of corrosion mechanisms, and concluding remarks. There has been much research recently, and much research continues in this area. This is expected to produce significantly better, more-corrosion-resistant Mg alloys.

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“…Addition of it below its solubility limit has been reported to enhance the degradation resistance of magnesium [15 -17]. Also small amounts of Mn were added to both new alloys, ZW21 and WZ21, because this aids melt cleaning by converting heavy metal impurities into compounds which separate out during melting and sediment [18,19]. The alloying amounts of Y, Zn and Ca were defined with respect to the microalloying concept, on experience basis and according to the following considerations, which are discussed in more detail in the following sections: (i) their beneficial influence on the degradation resistance; (ii) their potential for grain growth restriction during solidification; and (iii) the possible formation of fine grain boundary pinning IMPs.…”

Section: Design Strategymentioning

confidence: 99%

Design strategy for new biodegradable Mg–Y–Zn alloys for medical applications

Hänzi

Sologubenko

Uggowitzer

2009

International Journal of Materials Research

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Design strategy for new biodegradable Mg-Y-Zn alloys for medical applications Dedicated to Professor Dr. Franz Jeglitsch on the occasion of his 75 th birthdayThe aim of this article is to describe the design strategy deployed in developing new biodegradable Mg-Y-Zn alloys. The development approach is based on a microalloying concept which aims to restrict grain growth considerably during alloy casting and forming. We discuss the efficiency of the design approach, and evaluate the characteristics of the new alloys using metal-physical experiments, thermodynamic calculations and transmission electron microscopy analysis. Our results show that after extrusion the alloys have very fine grains (< 10 lm), exhibit high ductility (uniform elongation: 17 -20 %) at considerable strength (ultimate tensile strength: 250 -270 MPa) and reveal the presence of finely distributed intermetallic particles which are stable upon annealing. Due to an attractive combination of mechanical, electrochemical and biological properties, the new alloys are very promising not only for applications in medicine but also in other fields.A. C. Hänzi et al.: Design strategy for new biodegradable Mg -Y -Zn alloys for medical applications Int.

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Calculated phase diagrams, iron tolerance limits, and corrosion of Mg-Al alloys

Cited by 46 publications

References 65 publications

Effects of processing variables on melt cleanliness of AZ31B magnesium alloy investigated by quantitative evaluation of Fe and non-metallic inclusions

Effects of processing variables on melt cleanliness of AZ31B magnesium alloy investigated by quantitative evaluation of Fe and non-metallic inclusions

Review of Recent Developments in the Field of Magnesium Corrosion

Design strategy for new biodegradable Mg–Y–Zn alloys for medical applications

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