Wear behaviors and wear mechanisms of wrought magnesium alloy AZ31 fabricated by extrusion-shear

Hu, H-J; Sun, Z.; Ou, Z-W; Wang, Xiuquan

doi:10.1016/j.engfailanal.2016.11.014

Cited by 23 publications

(4 citation statements)

References 12 publications

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“…It can be seen from Figure 8a,b that there were parallel furrows and a little adhesion trace on the wear trace of the AZ91D magnesium alloy, with some cracks distributing on the edge of the furrows, and some debris were observed. Hence, the wear mechanism of AZ91D was typical abrasive wear and adhesive wear [24][25][26][27].…”

Section: Wear Performancementioning

confidence: 99%

Microstructure and Properties of Cold Sprayed NiCrAl Coating on AZ91D Magnesium Alloy

Zhao

Dong

et al. 2021

Coatings

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Herein, a NiCrAl coating was prepared on the AZ91D magnesium alloy by cold spraying technology. The microstructure, wear resistance, and corrosion resistance of the cold sprayed NiCrAl coating were studied and compared with two NiCrAl coatings prepared by plasma spraying. The results showed that the porosity of the two-plasma sprayed NiCrAl coatings was 3.21% and 2.66%, respectively, while that of the cold sprayed NiCrAl coating was only 0.68%. The hardness of the cold sprayed NiCrAl coating (650 HV0.1) was higher than those of the two-plasma sprayed NiCrAl coatings (300 HV0.1, 400 HV0.1). In the abrasion resistance test, the cold sprayed NiCrAl coating showed a lower friction coefficient (0.346), less wear volume (3.026 mm3), and superior wear resistance accordingly compared with the two-plasma sprayed NiCrAl coatings. Moreover, the scanning electron microscopy (SEM) morphology at the bottom of the wear trace of the cold sprayed NiCrAl coating showed a compact mechanically mixed layers (MML) structure, and its wear mechanism was mainly abrasive wear, with some fatigue wear. In the electrochemical test, the corrosion current density of the cold sprayed NiCrAl coating (4.404 × 10−2 A·cm−2) was much lower than those of two plasma sprayed coatings (25.96 A·cm−2, 26.98 A·cm−2), indicating that the cold sprayed NiCrAl coating had superior corrosion resistance. Therefore, preparing a cold sprayed NiCrAl coating is a feasible method to comprehensively improve the wear resistance and corrosion resistance of the AZ91D magnesium alloy.

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Section: Wear Performancementioning

confidence: 99%

Microstructure and Properties of Cold Sprayed NiCrAl Coating on AZ91D Magnesium Alloy

Zhao

Dong

et al. 2021

Coatings

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“…shows the SEM micrographs of worn surfaces of annealed and ECAPed samples. Numerous studies 19,23,[54][55][56][57][58][59][60][61][62] have classified the various wear mechanisms in magnesium alloys into two basic categories of wear regimes namely, mild and severe wear regimes, based on the wear test parameters, that is, applied load and sliding velocity. In the mild wear regime exists two subregimes denoted by oxidation wear and delamination wear regime.…”

Section: Wear Studymentioning

confidence: 99%

Mechanical and wear behavior of room-temperature ECAPed Mg-4Li alloy

Ahirwar

Ravisankar

Babu

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The excellent specific strength of magnesium and its alloys makes them appealing for use in many engineering applications especially in the transportation industry. However, its use is restricted due to poor formability and wear resistance. Li addition enhances the formability of magnesium alloys while diminishing their strength. Equal channel angular pressing (ECAP) is one of the effective severe plastic deformation (SPD) methods that improves the strength by grain refinement thereby wear resistance. In this study, the effect of ECAP on the mechanical and wear behavior of Mg-4Li alloy is studied and correlated with grain refinement and microstructural features. The substantial grain refinement was obtained after three passes of ECAP and the sample was processed in the route BC displayed a minimum grain size of ∼9 µm. The ECAPed samples showed improved hardness and tensile properties and the sample ECAPed in the route BC displayed superior mechanical properties owing to its more refined microstructure. The microstructural features are analyzed using X-ray diffraction line profile analysis (XRDLPA) and correlated with the mechanical properties. The wear behavior viz. wear rate, coefficient of friction (COF) and roughness were investigated. It was demonstrated that the wear properties are improved after ECAP due to the refined microstructure and enhanced hardness and the obtained wear results are in good agreement with Archard’s wear law.

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“…For example, Niu et al have investigated the effects of test parameters such as test load, sliding speed, and ambient temperature on the friction and wear behavior of magnesium alloys and determined the wear mechanism of the Mg-3Al--0.4Si alloy under different test conditions [8,9]. Hu et al have investigated the effect of large deformation processing, such as high-pressure torsion on the tribological behavior of magnesium alloys [10,11]. Yagi et al have reported that the addition of rare earth elements such as Y and Gd can effectively enhance the wear resistance of magnesium alloys [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effects of Al content on friction and wear behavior of weld surfacing Mg-Al-Zn alloy

Chen¹,

Zhao²,

Zheng³

et al. 2020

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In this study, surfacing-welding magnesium alloys with different compositions were prepared by changing the Al content in the Mg-Al-Zn alloy welding wire. Also, the effects of the Al content on the dry sliding tribological performance and wear mechanism at room temperature were investigated. The results revealed that the macro-hardness of the surfacing-welding Mg-Al-Zn alloy gradually increases. Also, the coefficient of friction and wear rate gradually decreases with the increase in the Al content from 3 to 9 % within the parameter range. Among these alloys, the surfacing-welding alloy containing 9 % Al exhibited the best wear resistance. The mechanism revealed that with the increase in the Al content, the grain size and amount of the β-Mg17Al12 phase in the alloy gradually increased, and the phase evolved into a reticular shape from the originally dispersed particles. During the wear process, the reticular phase can resist the plowing action caused by microscopic hard protrusions on the grinding disc and the wear debris, protect the α-Mg matrix, decrease the amount of fine granular debris generated by the abrasive wear mechanism, and enhance the wear resistance of the surfacing-welding alloy. Four wear mechanisms were observed during the friction and wear process of the surfacing-welding Mg-Al-Zn alloy, among which the abrasive wear and plastic extrusion of the surface metal were the principal wear mechanisms, while the oxidative wear and delamination wear were the secondary wear mechanisms.

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Wear behaviors and wear mechanisms of wrought magnesium alloy AZ31 fabricated by extrusion-shear

Cited by 23 publications

References 12 publications

Microstructure and Properties of Cold Sprayed NiCrAl Coating on AZ91D Magnesium Alloy

Microstructure and Properties of Cold Sprayed NiCrAl Coating on AZ91D Magnesium Alloy

Mechanical and wear behavior of room-temperature ECAPed Mg-4Li alloy

Effects of Al content on friction and wear behavior of weld surfacing Mg-Al-Zn alloy

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