Microstructural stability and creep of rare-earth containing magnesium alloys

Moreno, Ian P.; Nandy, T.K.; Jones, J. W.; Allison, J.; Pollock, Tresa M.

doi:10.1016/s1359-6462(02)00595-x

Cited by 230 publications

(106 citation statements)

References 3 publications

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“…희토류 원소(RE)는 마그네슘에 첨가되면 내열성이 향상되는 것으로 보고되어 있어 고온강도, 크리프 저항성 등을 높이기 위한 방편으로 활용되는 경우가 많으며, 또한 마그네슘의 전도 성 저하에 미치는 영향이 Al에 비해 상대적으로 작은 것으로 알려져 있다 [4]. 이러한 이유로 RE는 알루미늄을 대체할 합금 원소로서 유망할 것으로 생각되지만 마그네슘합금의 전도성과 기계적 성질에 미치는 영향 등이 Mg-Al합금에 비하여 아직 충분히 연구되지 않았다.…”

Section: 서 론unclassified

Microstructure and Properties of Mg-RE-Zn Alloys for High Conductivity Parts

Kim¹,

Kim²

2014

Journal of Korea Foundry Society

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The relatively low conductivity of conventional Mg-Al alloys often limits their areas of application. Therefore, several attempts to develop new high-conductivity magnesium alloys have been made recently. In this research, A Ce-rich rare-earth (RE)material and zinc were added to magnesium which contained no aluminum. As the RE and Zn content were increased, both the hardness and tensile strength were gradually increased, despite the fact that the electrical conductivity decreased slightly. The effects of an aging treatment on the conductivity and mechanical properties of Mg-RE-Zn alloys were also investigated. The electrical conductivity did not change according to the heat treatment conditions; however, the mechanical properties could be enhanced by proper aging heat treatments.

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Section: 서 론unclassified

Microstructure and Properties of Mg-RE-Zn Alloys for High Conductivity Parts

Kim¹,

Kim²

2014

Journal of Korea Foundry Society

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“…Consequently, the sliding of grain boundaries and the slip of dislocations in the matrix were effectively prevented at elevated temperatures, improving the creep resistance of Mg8Al base alloy. 34,35) Thus the alloying with RE leads to increasing both the corrosion and creep resistance of Mg-8Al base alloy.…”

Section: Creep Mechanismmentioning

confidence: 99%

Creep and Corrosion Properties of the Extruded Magnesium Alloy Containing Rare Earth

Jain

Koo

2007

Mater. Trans.

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Effects of microstructures on the creep and corrosion properties were investigated in the Mg-8Al alloys with addition of the rare earth elements (La-rich Mischmetal, RE). The addition of RE to Mg-8Al alloy may form a stable intermetallic phase, Al 11 RE 3 at elevated temperature, and suppress the phase (Mg 17 Al 12 ) with poor stability at high temperature. The corrosion rate of the alloy slightly decreases with increasing the added RE contents. The constant-load creep behavior was examined at 423, 448 and 473 K under stresses between 40 and 100 MPa. The RE-containing alloy showed a prolonged period of stead-state creep compared to the Mg-8Al base alloy and slightly reduced minimum creep rates. A stress exponent of 2 estimated suggests that the creep behavior can be controlled by the grain boundary sliding. The apparent activation energy for creep of Mg-8Al and Mg-8Al-2RE alloys are 114 and 104 kJ mol À1 , respectively.

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“…Moreover, the resultant anodized coatings generally consist of porous layer exhibiting low corrosion resistance. As a consequence, it is essential to find a solution for these drawbacks, which can be applicable in industrial field [17][18].…”

Section: Introductionmentioning

confidence: 99%

The Characteristic Study of Plasma Electrolytic Oxidation in AZ31B Magnesium Alloy

Yu¹,

Choi²,

Yu³

et al. 2015

Journal of Electrical Engineering and Technology

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-In this study low voltage Plasma Electrolytic Oxidation (PEO) was utilized to eliminate high voltage PEO drawbacks such as high cost, dimensional deformation and porosity. Low voltage PEO produces a thin coating which causes low corrosion resistance. In order to solve such problem, 0.1~0.6M pyrophosphates were added in a bath containing 1.4M NaOH, and 0.35M Na 2 SiO 3 . 70 V PEO was conducted at 25℃ for 3 minutes. Chemical composition, morphology and corrosion resistance of the anodized coating were analyzed. The anodized film was composed of MgO, Mg 2 SiO 4 , and Mg 2 O 7 P 2 . The morphology of film showed appropriately dense structure and low porosity in the anodized layers. It is found that low voltage Plasma Electrolytic Oxidation in cooperation with phosphating treatment can provide a good corrosion protection for the AZ31B magnesium alloy.

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Microstructural stability and creep of rare-earth containing magnesium alloys

Cited by 230 publications

References 3 publications

Microstructure and Properties of Mg-RE-Zn Alloys for High Conductivity Parts

Microstructure and Properties of Mg-RE-Zn Alloys for High Conductivity Parts

Creep and Corrosion Properties of the Extruded Magnesium Alloy Containing Rare Earth

The Characteristic Study of Plasma Electrolytic Oxidation in AZ31B Magnesium Alloy

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