Effect of Pb and Sb additions on the precipitation kinetics of AZ91 magnesium alloy

Balasubramani, Nagasivamuni; Srinivasan, A.; Pillai, U.T.S.; Pai, B.C.

doi:10.1016/j.msea.2006.12.132

Cited by 51 publications

(28 citation statements)

References 15 publications

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“…By substituting Eq. [2] into Eq. [1], and rearrangement, a power-law relationship between the impression velocity and the punching stress is obtained as the following equation:…”

Section: A Creep Mechanismmentioning

confidence: 99%

“…Based on Eq. [2], the parameters c 1 and c 2 have to be defined to correlate the impression creep data and equivalent uniaxial creep properties. It has been previously reported that the constants c 1 and c 2 have typical values in the range of 2 to 4 and 0.5 to 1.5, respectively.…”

Section: B Constitutive Equationsmentioning

confidence: 99%

“…[26,42] The appropriate values of c 1 and c 2 were obtained by fitting the normalized impression creep rate data with the previously reported tensile creep data for AZ91 alloy, as Figure 11 shows. Equation [2] was used for calculating the equivalent stress and creep rate. The best fit obtained between the equivalent creep data and tensile creep data with c 1 = 3 and c 2 = 0.5.…”

Section: B Constitutive Equationsmentioning

confidence: 99%

“…[1] AZ91 (Mg-9Al-0.8Zn-0.2Mn) alloy is the most common commercial magnesium alloy, which has the best combination of the mechanical properties and castability. [2,3] However, because of the rapid degradation of the mechanical properties, especially the creep properties at high temperatures, its application is limited to temperatures below 393 K (120°C). [4][5][6] Therefore, there have been various attempts to improve the hightemperature properties of AZ91 alloy by adding Ca, Sr, Sb, Bi, and rare earth (RE) elements.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ca and Rare Earth Elements on Impression Creep Properties of AZ91 Magnesium Alloy

Nami

Razavi

Mirdamadi

et al. 2010

Metall Mater Trans A

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Creep properties of AZ91 magnesium alloy and AZRC91 (AZ91 + 1 wt pct RE + 1.2 wt pct Ca) alloy were investigated using the impression creep method. It was shown that the creep properties of AZ91 alloy are significantly improved by adding Ca and rare earth (RE) elements. The improvement in creep resistance is mainly attributed to the reduction in the amount and continuity of eutectic b(Mg 17 Al 12 ) phase as well as the formation of new Al 11 RE 3 and Al 2 Ca intermetallic compounds at interdendritic regions. It was found that the stress exponent of minimum creep rate, n, varies between 5.69 and 6 for AZ91 alloy and varies between 5.81 and 6.46 for AZRC91 alloy. Activation energies of 120.9 ± 8.9 kJ/mol and 100.6 ± 7.1 kJ/mol were obtained for AZ91 and AZRC91 alloys, respectively. It was shown that the lattice and pipediffusion-controlled dislocation climb are the dominant creep mechanisms for AZ91 and AZRC91 alloys, respectively. The constitutive equations, correlating the minimum creep rate with temperature and stress, were also developed for both alloys.

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“…By substituting Eq. [2] into Eq. [1], and rearrangement, a power-law relationship between the impression velocity and the punching stress is obtained as the following equation:…”

Section: A Creep Mechanismmentioning

confidence: 99%

Section: B Constitutive Equationsmentioning

confidence: 99%

Section: B Constitutive Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Ca and Rare Earth Elements on Impression Creep Properties of AZ91 Magnesium Alloy

Nami

Razavi

Mirdamadi

et al. 2010

Metall Mater Trans A

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“…Most of these investigations, however, focused on the AZ(MgAlZn) and AM(MgAlMn) series of magnesium alloys, such as AZ91D and AM50. 5) Recently, magnesium alloys containing alkaline metals (Ca and Sr) and rare earth (RE) elements were reported to improve corrosion resistance of MgAl alloys.…”

Section: Introductionmentioning

confidence: 99%

Influence of Addition of Ge on the Microstructure and Corrosion Properties of Magnesium

et al. 2012

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The corrosion properties of MgxGe (x = 0, 0.5, 1.0, 1.5 and 2.0 mass%) alloys were investigated. Potentiodynamic polarization and electrochemical impedance spectroscopy tests were carried out in a 3.5% NaCl solution at pH 7.2 to measure the corrosion properties of Mg xGe (x = 0, 0.5, 1.0, 1.5 and 2.0 mass%) alloys. Microstructural analysis showed that a Mg 2 Ge phase formed mainly in the interdendritic areas. The volume fraction of the Mg 2 Ge phase was increased with increasing Ge content. The corrosion resistance of the MgxGe alloys was improved by Ge addition. In particular, the Mg1.5 mass%Ge alloy showed the superior corrosion resistance of the alloys examined.

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Development of a Generalised Understanding of Environmentally‐Assisted Degradation of Magnesium‐Aluminium Alloys

Winzer¹,

Höpfel²,

Casajús³

2014

Magnesium Technology 2014

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Effect of Pb and Sb additions on the precipitation kinetics of AZ91 magnesium alloy

Cited by 51 publications

References 15 publications

Effect of Ca and Rare Earth Elements on Impression Creep Properties of AZ91 Magnesium Alloy

Effect of Ca and Rare Earth Elements on Impression Creep Properties of AZ91 Magnesium Alloy

Influence of Addition of Ge on the Microstructure and Corrosion Properties of Magnesium

Development of a Generalised Understanding of Environmentally‐Assisted Degradation of Magnesium‐Aluminium Alloys

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