Dry sliding wear behavior of globular AZ91 magnesium alloy and AZ91/SiCp composites

García-Rodríguez, S.; Torres, B.; Maroto, A.; López, A.J.; Otero, E.; Rams, J.

doi:10.1016/j.wear.2017.06.010

Cited by 135 publications

(59 citation statements)

References 34 publications

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“…Due to frictional heating, magnesium surface was oxidized during testing. Formation of oxide layer as observed in the present study gives the indication of oxidative wear mechanism [22]. Figures 9(a) and (b) show the worn surface morphology of wear track obtained for BM and composite sample at sliding velocity of 0.12 m s −1 .…”

Section: Resultssupporting

confidence: 64%

“…AZ91 Mg alloy possesses excellent castability, suitable mechanical properties, moderate corrosion resistance and commercial availability with reasonable price [21]. Previous studies have explored the sliding wear behavior of AZ91 Mg alloy and its composites [8,[14][15][16][22][23][24][25][26]. From these findings, it can be learned that the abrasion and adhesion were the common wear mechanisms in magnesium alloys during testing at lower sliding velocities and when testing at higher sliding velocities, more oxidation occurs due to increased frictional heating.…”

Section: Introductionmentioning

confidence: 99%

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Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing

Patle

Sunil²,

Dumpala

2020

Mater. Res. Express

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In the present study, the surface of AZ91 Mg alloy was modified by incorporating boron carbide (B 4 C) particles using friction stir processing (FSP). Sliding wear behavior of these developed AZ91/B 4 C surface composites was investigated against AISI 52100 steel ball using linear reciprocating tribometer. Hardness tests reveal that the hardness of the fabricated surface composite (∼137.47 HV) is significantly increased compared to the base metal (∼95.5 HV) due to the presence of B 4 C particles.Wear tests were conducted on the samples at two different sliding velocities; 0.06 m s −1 and 0.12 m s −1 . It was observed that at higher sliding velocity of 0.12 m s −1 , AZ91/B 4 C surface composite exhibited lower friction coefficient value in comparison to that of the base metal, whereas it is vice versa at the low sliding velocity of 0.06 m s −1 . However, surface composites exhibited superior wear resistance at both the sliding velocities, in comparison to that of the base metal. Scanning electron microscopy and energy-dispersive spectroscopy analysis of the wear tracks were carried out to understand the wear mechanisms. From the observations, a combination of abrasive, adhesive, and oxidative wear mechanisms were found to be prominent.

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Section: Resultssupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing

Patle

Sunil²,

Dumpala

2020

Mater. Res. Express

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“…AZ91 magnesium alloy is excellent and the most widely used of die-casting magnesium alloys, due to its high strength-to-weight ratio, suitable corrosion resistance and mechanical properties for room temperature application [1][2][3]. AZ91 Magnesium alloy is an excellent cast magnesium alloy with high specific strength and strong corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Rare Earth Pr and Heat Treatment on the Wear Properties of AZ91 Alloy

Yan

2018

Crystals

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This paper investigated the influences of Pr addition and heat treatment (T6) on the dry sliding wear behavior of AZ91 alloy. The wear rates and friction coefficients were measured by using a pin-on-disc tribometer under loads of 30, 60 and 90 N at dry sliding speeds of 100 rpm, over a sliding time of 15 min. The worn surfaces were examined using a scanning electron microscope and was analyzed with an energy dispersive spectrometer. The experimental results revealed that AZ91-1.0%Pr magnesium alloy exhibited lower wear rate and friction coefficient than the other investigated alloys. As the applied load increased, the wear rate and friction coefficient increased. Compared with the as-cast AZ91-1.0%Pr magnesium alloy, the hardness and wear resistance of the alloy after solution treatment were reduced, and through the subsequent aging, the hardness and wear resistance of the alloy were improved and the hardness was 101.1 HB (compared to as-cast AZ91 magnesium alloy, it increased by 45%). The AZ91-1.0%Pr with T6 magnesium alloy exhibited best wear resistance. Abrasion was dominant at load of 30 N, delamination was dominant at load of 60 N and plastic deformation was dominant at load of 90 N. Oxidation was observed at all loads.

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“…That is to say, most particles were located at grain boundaries. At present, 2 of 16 researches on magnesium matrix composites were mainly focused on their tensile mechanical properties, and little work reported the wear behavior of these magnesium matrix composites [20]. Since the magnesium matrix composites were usually adopted as automotive components, their wear behaviors were of vital importance to their operation performance and service life.…”

Section: Introductionmentioning

confidence: 99%

Effect of Necklace-Type Distribution of SiC Particles on Dry Sliding Wear Behavior of As-Cast AZ91D/SiCp Composites

Sun

Liu

et al. 2020

Crystals

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In this study, the dry sliding wear behaviors of SiC particle reinforced AZ91D matrix composites fabricated by stirring casting method were systematically investigated. The SiC particles in as-cast composites exhibited typical necklace-type distribution, which caused the weak interface bonding between SiC particles and matrix in particle-segregated zones. During dry sliding at higher applied loads, SiC particles were easy to debond from the matrix, which accelerated the wear rates of the composites. While at the lower load of 10 N, the presence of SiC particles improved the wear resistance. Moreover, the necklace-type distribution became more evident with the decrease of particle sizes and the increase of SiC volume fractions. Larger particles had better interface bonding with the matrix, which could delay the transition of wear mechanism from oxidation to delamination. Therefore, composites reinforced by larger SiC particles exhibited higher wear resistance. Similarly, owing to more weak interfaces in the composites with high content of SiC particles, more severe delamination occurred and the wear resistance of the composites was impaired.

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Dry sliding wear behavior of globular AZ91 magnesium alloy and AZ91/SiCp composites

Cited by 135 publications

References 34 publications

Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing

Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing

The Effects of Rare Earth Pr and Heat Treatment on the Wear Properties of AZ91 Alloy

Effect of Necklace-Type Distribution of SiC Particles on Dry Sliding Wear Behavior of As-Cast AZ91D/SiCp Composites

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Dry sliding wear behavior of globular AZ91 magnesium alloy and AZ91/SiCp composites

Cited by 135 publications

References 34 publications

Sliding wear behavior of AZ91/B4C surface composites produced by friction stir processing

Sliding wear behavior of AZ91/B4C surface composites produced by friction stir processing

The Effects of Rare Earth Pr and Heat Treatment on the Wear Properties of AZ91 Alloy

Effect of Necklace-Type Distribution of SiC Particles on Dry Sliding Wear Behavior of As-Cast AZ91D/SiCp Composites

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Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing

Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing