Influence of Refinement and Modification on Dry Sliding Wear Behavior of Hypereutectic Al-Si Cast Alloys

The microstructures and dry sliding wear behavior of Al-17Si cast alloys were studied after various melt treatments such as refinement and modification. Results indicate that combined refined and modified Al-17Si cast alloys have microstructures consisting of uniformly distributed primary silicon and fine eutectic AlSilicon particles through out the matrix. These alloys exhibited better wear resistance in the cast condition compared with the same alloy subjected to only refinement or modification. The improvements in properties observed in the present studies are mainly due to the structural differences between the refined, modified or both refined and modified over just cast Al-Si alloys. This paper attempts to investigate the influence of the microstructural changes in the Al-17Si cast alloys by refinement, modification and combined action of both on the dry sliding wear behavior.

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Differences in Dry Sliding Wear Behavior between Al–12Si–CuNiMg Alloy and Its Composite Reinforced with Al2O3 Fibers

Materials ◽

10.3390/ma12111749 ◽

2019 ◽

Vol 12 (11) ◽

pp. 1749 ◽

Cited By ~ 2

Author(s):

Qing Zhang ◽

Jie Gu ◽

Shuo Wei ◽

Ming Qi

Keyword(s):

Sliding Wear ◽

Volume Fraction ◽

Wear Behavior ◽

Testing Machine ◽

Matrix Alloy ◽

Wear Testing ◽

Dry Sliding Wear ◽

Dry Sliding ◽

The Matrix ◽

Pin On Disk

The dry sliding wear behavior of the Al-12Si-CuNiMg matrix alloy and its composite reinforced with Al2O3 fibers was investigated using a pin-on-disk wear-testing machine. The volume fraction of Al2O3 fibers in the composite was 17 vol.%. Wear tests are conducted under normal loads of 2.5, 5.0, and 7.5 N, and sliding velocities of 0.25, 0.50, and 1.0 m/s. Furthermore, the worn surfaces of the matrix alloy and the composite were examined using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results showed that the wear resistance of the composite was inferior to that of the matrix alloy, which could be attributed to the high content of reinforcement and casting porosities in the composite. Worn-surface analysis indicates that the dominant wear mechanisms of both materials were abrasive wear and adhesive wear under the present testing conditions.

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

Crystals ◽

10.3390/cryst10040296 ◽

2020 ◽

Vol 10 (4) ◽

pp. 296 ◽

Cited By ~ 1

Author(s):

Chao Sun ◽

Nannan Lu ◽

Huan Liu ◽

Xiaojun Wang ◽

Xiaoshi Hu ◽

...

Keyword(s):

Wear Resistance ◽

Sliding Wear ◽

Wear Behavior ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Interface Bonding ◽

Type Distribution ◽

Wear Rates ◽

Sic Particles ◽

The Matrix

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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Microstructure and Wear Properties of In Situ TiC-Cr7C3/Fe Surface Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.415-417.170 ◽

2011 ◽

Vol 415-417 ◽

pp. 170-173

Author(s):

Jing Wang ◽

Si Jing Fu ◽

Yi Chao Ding ◽

Yi San Wang

Keyword(s):

Sliding Wear ◽

Wear Behavior ◽

Wear Test ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Test Machine ◽

Wear Properties ◽

Surface Composite ◽

The Matrix

A wear resistant TiC-Cr7C3/Fe surface composite was produced by cast technique and in-situ synthesis technique. The microstructure and dry-sliding wear behavior of the surface composite was investigated using scanning electron microscope(SEM), X-ray diffraction(XRD) and MM-200 wear test machine. The results show that the surface composite consists of TiC and Cr7C3as the reinforcing phase, α-Fe and γ-Fe as the matrix. The surface composite has excellent wear-resistance under dry-sliding wear test condition with heavy loads.

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Influence of grain refinement and modification on dry sliding wear behavior of Al-12Si and Al-12Si-3Cu cast alloys

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.3139/146.101718 ◽

2008 ◽

Vol 99 (8) ◽

pp. 900-906 ◽

Cited By ~ 4

Author(s):

K. G. Basavakumar ◽

P. G. Mukunda ◽

M. Chakraborty

Keyword(s):

Grain Refinement ◽

Sliding Wear ◽

Wear Behavior ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Cast Alloys

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OPTIMIZATION AND ANALYSIS OF DRY SLIDING WEAR BEHAVIOR OF STIR CASTED AlSi6Cu4–TiO2 COMPOSITE USING CENTRAL COMPOSITE DESIGN

Surface Review and Letters ◽

10.1142/s0218625x19500525 ◽

2019 ◽

Vol 26 (09) ◽

pp. 1950052

Author(s):

SUBBARAYAN SIVASANKARAN

Keyword(s):

Wear Rate ◽

Sliding Wear ◽

Wear Behavior ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Wear Performance ◽

Microstructural Investigation ◽

Confirmation Test ◽

The Matrix ◽

Sliding Distance

The present research paperfocusses on manufacture of AlSi6Cu4–3 wt.% TiO2 metal matrix composite (MMC) through liquid metallurgy route, and the manufactured composites are tested for their dry sliding wear behavior using response surface methodology (RSM). The extensive microstructural investigation is carried out to examine the dispersion of Titania particles, its bonding ability, and embedment characteristics with the matrix. The wear rate on the developed MMC is investigated and predicted using regression model. Further, the confirmation test is conducted to validate the model. The microstructures of the composite had revealed that TiO2 particles are dispersed in the Al matrix. Further, the surface plots show that the wear rate started to vary linearly with the function of load whereas the wear rate starts to vary nonlinearly with the function of the sliding velocity and the sliding distance. In addition, the worn surfaces were investigated through the scanning electron microscopewhich addressed the wear mechanisms and revealed that TiO2 particles enhance the wear performance of aluminum alloy by a reduction in material removal at all wear conditions.

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Dry sliding wear behavior of Saffil fiber-reinforced Mg-10Gd-3Y-0.5Zr magnesium alloy-based composites

Journal of Composite Materials ◽

10.1177/0021998310377938 ◽

2010 ◽

Vol 45 (6) ◽

pp. 683-693 ◽

Cited By ~ 4

Author(s):

Bin Hu ◽

Liming Peng ◽

Wenjiang Ding

Keyword(s):

Magnesium Alloy ◽

Wear Rate ◽

Sliding Wear ◽

Applied Load ◽

Wear Behavior ◽

Matrix Alloy ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Sliding Velocity ◽

The Matrix

Dry sliding wear behavior of the creep-resistant magnesium alloy Mg-10Gd-3Y-0.5Zr and its composites have been investigated in this study. Magnesium matrix composites are prepared by squeezing casting infiltration of Mg alloy into Saffil preforms. Wear tests are conducted using ball-on-flat sliding wear set up under a sliding velocity range of 1-15 cm/s and at an applied load range of 1-8 N for a constant sliding distance of 150 m. According to results, mechanical and wear-resistance properties of magnesium alloy improved by introducing Saffil fibers, and the alumina binder composite has a higher strength and lower wear rate than silica binder composite. The wear rates of the matrix alloy, composites and their counter-face balls increase with increasing applied load. The increment of sliding velocities decreases the wear rate of the matrix alloy under the tested sliding velocities. A critical threshold of sliding velocity for the wear rate of both composites and their counter-faces is about 9 cm/s. Abrasion and plastic deformation are considered to be the dominant mechanism for the matrix alloy in tested conditions, and for both composites under low sliding velocity (<10 cm/s) and at low applied loads (1-5 N). Delamination is the wear mechanism of the silica binder composites at a high applied load (8 N). Adhesion and oxidation are the controlling wear mechanism of matrix alloy and composites under a sliding velocity of 15 cm/s.

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