Improved high cycle fatigue properties of a new magnesium alloy

Li, Z.M.; Wang, Q.G.; Luo, Alan A.; Peng, Liming; Fu, Penghuai; Wang, Y.X.

doi:10.1016/j.msea.2013.06.001

Cited by 33 publications

(14 citation statements)

References 21 publications

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“…In order to alleviate the tremendous losses caused by the fatigue failure of the critical parts in aircrafts, material scientists never stop pursuing good fatigue properties of aeronautical materials [2][3][4][5][6][7]. Titanium alloys are widely used in the field of aerospace for its high specific strength, outstanding resistance to fatigue, high temperature and environmental effects [8,9].…”

Section: Introductionmentioning

confidence: 99%

The crack initiation behavior and the fatigue limit of Ti–5Al–5Mo–5V–1Cr–1Fe titanium alloy with basket-weave microstructure

Shi

Zeng

Xue

et al. 2015

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

The crack initiation behavior and the fatigue limit of Ti–5Al–5Mo–5V–1Cr–1Fe titanium alloy with basket-weave microstructure

Shi

Zeng

Xue

et al. 2015

Journal of Alloys and Compounds

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“…Due to their low density, high specific strength, good vibrational absorption and good castability [1][2][3][4], Mg alloys are increasingly used in aerospace and automotive fields. Structural components for the transport industry, such as camshaft covers, clutch and transmission housings, intake manifolds, engine blocks, steering components, radiator supports, and automobile wheels, are inevitably subjected to cyclic stresses in service.…”

Section: Introductionmentioning

confidence: 99%

“…Structural components for the transport industry, such as camshaft covers, clutch and transmission housings, intake manifolds, engine blocks, steering components, radiator supports, and automobile wheels, are inevitably subjected to cyclic stresses in service. For this reason, investigation on the fatigue behaviour of both cast and wrought Mg alloys has recently drawn considerable interest [5][6][7][8][9]. Recent studies [7,9,10] have demonstrated that the addition of rare earth (RE) elements, such as Nd, Gd, Y, can remarkably enhance both the tensile and fatigue strength of Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Behavior of the Rare Earth Rich EV31A Mg Alloy: Influence of Plasma Electrolytic Oxidation

Ceschini¹,

Morri²,

Angelini³

et al. 2017

Preprint

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Rare earth rich magnesium alloys are used in aerospace and automotive fields because of their high specific strength and good castability. However, due to their low corrosion resistance, protective surface treatments, such as conversion coating or electroless plating are necessary, when they have to be used in humid or corrosive environments. The present study was aimed to evaluate the effect of Plasma Electrolytic Oxidation (PEO) and different surface roughness on the rotating bending fatigue of an innovative Mg alloy, with a high content of Nd (up to 3.1 wt%) and Gd (up to 1.7 wt %). Fatigue tests revealed a 15% decrease in the fatigue strength of the PEO treated alloy with respect to the bare alloy, probably due to the residual tensile stresses induced by the treatment. The effect of surface roughness on the bare alloy was, instead, negligible. The mechanisms of crack initiation were similar in the untreated and PEO treated alloy, with crack nucleation sites located in correspondence of large facets of the cleavage planes.

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“…Magnesium and its alloys have become increasingly attractive in the automotive and aerospace industries because of their many advantages, such as low density and high specific strength and stiffness. [1][2][3] In recent years, rare earth (RE) Mg alloys have received considerable attention.…”

mentioning

confidence: 99%

“…[1][2][3] In recent years, rare earth (RE) Mg alloys have received considerable attention. [4][5][6][7][8][9] Mg-RE alloys, especially the Mg-Gd-Y system, exhibit high strength and good creep resistance at both room temperature and elevated temperatures.…”

mentioning

confidence: 99%

Different Microgalvanic Corrosion Behavior of Cast and Extruded EW75 Mg Alloys

Liu¹,

Song²,

Shan³

et al. 2016

J. Electrochem. Soc.

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The size, distribution, and volume fraction of second phases are altered during extrusion deformation. As a result, the microgalvanic corrosion of Mg alloys will change. The corrosion behaviors of cast and extruded EW75 (Mg-5Y-7Gd-1Nd-0.5Zr) were studied by scanning electron microscopy observations, hydrogen evolution and weight loss measurements, and electrochemical tests. Extruded EW75, which has a lower volume fraction, smaller size, and more uniform distribution of second phases, is found to exhibit better corrosion resistance than cast EW75; the difference can be attributed to weaker microgalvanic corrosion and a more protective surface film. Magnesium and its alloys have become increasingly attractive in the automotive and aerospace industries because of their many advantages, such as low density and high specific strength and stiffness. [1][2][3] In recent years, rare earth (RE) Mg alloys have received considerable attention.4-9 Mg-RE alloys, especially the Mg-Gd-Y system, exhibit high strength and good creep resistance at both room temperature and elevated temperatures. [10][11][12][13] To improve the mechanical properties of Mg-RE alloys, altering the microstructure by deformation treatment is known to be a suitable and efficient method.14 However, the changes in the microstructures may strongly affect the corrosion resistance of the alloy. [15][16][17] The volume fraction, size, and distribution of second phases are altered during the deformation process.18-20 Hence, the microgalvanic corrosion between the second phases and the Mg matrix in the received cast and extruded (or forged) alloys should be different.Microgalvanic corrosion between the second phases and the Mg matrix is one of the most significant types of corrosion in Mg alloys. [21][22][23] In our previous work, we found that microgalvanic corrosion of cast EW75 differs from that of other Mg alloy systems. 24 The second phases in cast EW75 consisting of Mg and REs are more active than the Mg matrix, and they preferentially dissolve in microgalvanic corrosion. Moreover, REs that are bound in the second phases contribute to the construction of the initial surface film. A surface film containing REs is reportedly more protective. [25][26][27] Moreover, it was found that grain size influences the corrosion resistance little, which can be attributed to the good electrochemical uniformity of grain boundaries in comparison with the existence of second phases. The above analysis suggests that the microgalvanic corrosion between the second phases and the Mg matrix is very important to the corrosion mechanism and corrosion resistance of Mg-RE alloys. Therefore, if this type of corrosion were changed by the deformation process, the corrosion mechanism and corrosion resistance of Mg-RE alloys would differ greatly.The aim of this work is to investigate the corrosion behaviors of cast and extruded EW75 Mg alloys and clarify the effect of extrusion deformation on the corrosion resistance. ExperimentalCast and extruded EW75 (Gd: 7.04 wt%, Y: 4.53 wt%, Nd: 1...

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Improved high cycle fatigue properties of a new magnesium alloy

Cited by 33 publications

References 21 publications

The crack initiation behavior and the fatigue limit of Ti–5Al–5Mo–5V–1Cr–1Fe titanium alloy with basket-weave microstructure

The crack initiation behavior and the fatigue limit of Ti–5Al–5Mo–5V–1Cr–1Fe titanium alloy with basket-weave microstructure

Fatigue Behavior of the Rare Earth Rich EV31A Mg Alloy: Influence of Plasma Electrolytic Oxidation

Different Microgalvanic Corrosion Behavior of Cast and Extruded EW75 Mg Alloys

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