Mechanical characterization and corrosion behavior of newly designed Sn and Y added AZ91 alloy

Boby, Arun; Srinivasan, A.; Pillai, U.T.S.; Pai, B.C.

doi:10.1016/j.matdes.2015.09.010

Cited by 58 publications

(21 citation statements)

References 36 publications

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“…(Al,Mg) 2 Ca may also form [55], but was not detected in the present study. On the contrary, Sn possibly forms Mg 2 Sn intermetallics [56] which are located within the β-phase. According to Doernberg [57], the solubility of Sn in the β-phase is insignificant and the β-phase peaks in the XRD pattern were not shifted, which also suggests that the ternary solubility of Sn in the β-phase is reduced.…”

Section: Discussionmentioning

confidence: 99%

Corrosion of Mg-9Al alloy with minor alloying elements (Mn, Nd, Ca, Y and Sn)

et al. 2017

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Microstructure and corrosion behaviour of a Mg-9Al alloy with minor alloying additions (Mn, Y, Nd, Ca and Sn) are evaluated. All of the additions form Al-rich intermetallics with varying amounts of Fe, while Ca and Sn are also incorporated into the eutectic β-phase (β-Mg 17 Al 12). Special attention is given to the surface potential values of the microconstituents, which are related to the formation of microgalvanic couples. Scanning Kelvin Probe Force Microscopy (SKPFM) measurements revealed that all the alloying elements, except Sn, reduced the potential difference between the secondary phases and the matrix, which is the main reason for the improvement of the corrosion resistance of Mn-, Y-and Nd-modified alloys. The beneficial effect of Ca is additionally related to the microstructure refinement and an increased area fraction of the β-phase.

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Section: Discussionmentioning

confidence: 99%

Corrosion of Mg-9Al alloy with minor alloying elements (Mn, Nd, Ca, Y and Sn)

et al. 2017

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“…A seawater-activated battery is composed of two indispensable parts: a metal anode and a metal chloride cathode made of compounds such as AgCl and CuCl, and such batteries can be used as potential power sources for undersea devices including sonobuoys and electric torpedoes [7,8]. However, magnesium alloys are susceptible to selfcorrosion, and the alloy surface is often covered with corrosion products after discharge, which undermines their discharge performance [8][9][10][11][12]. Thus, there is a trade-off between activation and passivation for magnesium.…”

Section: Introductionmentioning

confidence: 99%

“…The choice of a suitable magnesium anode significantly impacts the properties of seawater-activated batteries [3,8]. The commonly utilized methods to further improve the properties of magnesium are alloying, plastic deformation, and heat treatment [5,10,12,13].…”

Section: Introductionmentioning

confidence: 99%

“…Rare earth elements (REs) have been found to be suitable candidate elements for alloying with magnesium, since they offer the functionalities of melt purification, lattice distortion, and cathode passivation [12,14,15]. In this regard, Hu et al [16] reported that the addition of cerium to AP65 alloy led to the refinement of β (Mg 17 Al 12 ) phases and the formation of Al-Ce phases, which significantly enhanced the electrochemical properties of AP65 alloy.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and electrochemical corrosion behavior of extruded Mg–Al–Pb–La alloy as anode for seawater-activated battery

et al. 2017

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“…According to Zeng et al 10) and Azizi et al 11) , Sn element with a high hydrogen overpotential tend to make cathodic hydrogen evolution more dif cult. Boby et al 12) reported that Sn addition improved the corrosion resistance of AZ91. The corrosion rate of AZ91 alloy shows 11.0 mm/year, whereas the corrosion rate reduces to 9.0 mm/year by 0.5 mass% Sn addition.…”

Section: Introductionmentioning

confidence: 99%

Stress Corrosion Behavior of Mg–2 mass% Sn Alloy by Equal-Channel Angular Extrusion

2017

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In this work, the stress corrosion behavior of Mg-2 mass% Sn alloy in simulated body uid solution was systematically investigated to determine its performance in a physiological environment. The effect of equal-channel angular extrusion (ECAE) on stress corrosion behavior of Mg-2 mass% Sn alloy was investigated using three-point bending test. ECAE process changed both grain size and Mg 2 Sn second phase distribution. The average grain size under homogenization annealing condition (about 123.61 μm) was signi cantly reduced to 34.32 μm after four ECAE passes. Mg 2 Sn phase formed more uniformly both in the grains and along the grain boundaries with ECAE process. The average volume fraction of Mg 2 Sn phase increased with increasing passes. The microstructure became more homogeneous with further ECAE passes. In bent-beam stress corrosion test, the average crack depths of samples underwent ECAE process were signi cantly lower than that of sample under homogenization annealing condition. This showed that the ECAE process could reduce crack propagation rate. The enhancement of stress corrosion resistance is attributable to uniform second phase distribution and grain re nement via ECAE process.

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Mechanical characterization and corrosion behavior of newly designed Sn and Y added AZ91 alloy

Cited by 58 publications

References 36 publications

Corrosion of Mg-9Al alloy with minor alloying elements (Mn, Nd, Ca, Y and Sn)

Corrosion of Mg-9Al alloy with minor alloying elements (Mn, Nd, Ca, Y and Sn)

Microstructure and electrochemical corrosion behavior of extruded Mg–Al–Pb–La alloy as anode for seawater-activated battery

Stress Corrosion Behavior of Mg–2 mass% Sn Alloy by Equal-Channel Angular Extrusion

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