Evaluation of Microstructural and Dry Sliding Wear Resistance of Iron-Based SiC-Reinforced Composite Coating by HVOF Process

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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Study on Tribology Properties of Graphite/TiC/Ni-Base Alloy Composite Coating

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.314-316.137 ◽

2011 ◽

Vol 314-316 ◽

pp. 137-142

Author(s):

Bin Cai ◽

Ye Fa Tan ◽

Hui Yong Ji ◽

Xiao Long Wang ◽

Long He ◽

...

Keyword(s):

Friction Coefficient ◽

Composite Coating ◽

Sliding Wear ◽

Base Alloy ◽

Alloy Coating ◽

Dry Sliding Wear ◽

Wear Loss ◽

Dry Sliding ◽

Alloy Composite ◽

Nacl Solution

In order to reduce friction coefficient of the Ni-base alloy coating and further improve its wear resistance, the graphite/TiC/Ni-base alloy composite coating was prepared on the surface of 45 carbon steel by plasma spray. Effects of loads, friction counterparts and lubricants on tribological properties of the coating were investigated. The results show that friction coefficient of the composite coating is reduced by 33% than that of the Ni-base alloy coating when worn against GCr15. Wear losses of the composite coating are less than those of the Ni-base alloy coating at all loads of 6N, 8N, 10N and 12N. Worn against Si3N4, friction coefficient of the composite coating is 13% less than that worn against GCr15, but its wear loss is 2.9 times of that worn against GCr15. Wear mechanism of the composite coating is micro cutting and brittle fraction when worn against Si3N4. Under lubrication of NaCl solution, friction coefficient of the composite coating is almost the same as that under dry sliding, wear loss is increased by 1.6 times. Stress corrosion and wedging effects of the NaCl solution are main wear mechanisms of the composite coating.

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Improving the Wear Resistance of Aluminum Fly Ash Composites by Multipass Friction Stir Processing

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.642.55 ◽

2015 ◽

Vol 642 ◽

pp. 55-59 ◽

Cited By ~ 1

Author(s):

Shueiwan Henry Juang ◽

Liang Jing Fan ◽

Hsu Shuo Chang

Keyword(s):

Wear Resistance ◽

Fly Ash ◽

Friction Stir Processing ◽

Sliding Wear ◽

Normal Load ◽

Aluminum Matrix ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Wear Rates ◽

Friction Stir

In this study, the multi-pass friction stir processing (MP-FSP) technique was performed on ADC6 aluminum alloy + 5 wt% fly ash composite (A5FC) castings to increase their surface area. The dry sliding wear behaviors of the ADC6 alloy, A5FCs, and MP-FSPed A5FCs were evaluated. Dry sliding wear tests were performed using a ring-on-washer machine at a constant rotation speed of 100 rpm for 60 min, and the normal load was 10, 20, 30, and 40 N. The results showed that the MP-FSPed A5FCs had the lowest wear rates in the load range from 10 to 40 N, and adhesive wear was the major wear mechanism in these tests. The increased wear resistance was mainly due to grain refinement and elimination of casting defects after subjecting the ash composite to MP-FSP. The microstructure of the MP-FSPed A5FCs reveals that the sizes of the added raw fly ash particles decreased from micro-to nanoscale levels, and the nanoscale fly ash was uniformly dispersed in the aluminum matrix.

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Characterization of dry sliding wear resistance of laser surface hardened En 8 steel

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2004.09.085 ◽

2005 ◽

Vol 167 (1) ◽

pp. 83-90 ◽

Cited By ~ 16

Author(s):

Rakesh Kaul ◽

P. Ganesh ◽

Pragya Tiwari ◽

R.V. Nandedkar ◽

A.K. Nath

Keyword(s):

Wear Resistance ◽

Sliding Wear ◽

Laser Surface ◽

Dry Sliding Wear ◽

Dry Sliding

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Experimental investigation on dry sliding wear resistance of recently developed hyper-duplex stainless steel

Materials Today Proceedings ◽

10.1016/j.matpr.2020.03.292 ◽

2020 ◽

Vol 22 ◽

pp. 2172-2178

Author(s):

P. NithinRaj ◽

Nithin Sivadas ◽

K. Sekar ◽

M.A. Joseph

Keyword(s):

Experimental Investigation ◽

Stainless Steel ◽

Wear Resistance ◽

Duplex Stainless Steel ◽

Sliding Wear ◽

Dry Sliding Wear ◽

Dry Sliding

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Effect of Nanobainite Content on the Dry Sliding Wear Behavior of an Al-Alloyed High Carbon Steel with Nanobainitic Microstructure

Materials ◽

10.3390/ma12101618 ◽

2019 ◽

Vol 12 (10) ◽

pp. 1618 ◽

Cited By ~ 2

Author(s):

Zhaohuan Song ◽

Songhao Zhao ◽

Tao Jiang ◽

Junjie Sun ◽

Yingjun Wang ◽

...

Keyword(s):

Wear Resistance ◽

Carbon Steel ◽

Sliding Wear ◽

Wear Behavior ◽

Normal Load ◽

High Carbon Steel ◽

Peak Hardness ◽

Dry Sliding Wear ◽

Dry Sliding ◽

High Carbon

In this work, a multiphase microstructure consisting of nanobainte, martensite, undissolved spherical carbide, and retained blocky austenite has been prepared in an Al-alloyed high carbon steel. The effect of the amount of nanobainite on the dry sliding wear behavior of the steel is studied using a pin-on-disc tester with loads ranging from 25–75 N. The results show that, there is no significant differences in specific wear rate (SWR) for samples with various amounts of nanobainite when the normal load is 25 N. While, the SWR firstly decreases and then increases with increasing the amount of nanobainite, and the optimum wear resistance is obtained for samples with 60 vol.% nanobainite, when the applied load increases to 50 and 75 N. The improved wear resistance is attributed to the peak hardness increment resulted from the transformation of retained austenite to martensite, work hardening, along with amorphization and nanocrystallization of the worn surface. In addition, the highest toughness of the samples with 60 vol.% nanobainite is also proven to play a positive role in resisting sliding wear. EDS (energy dispersion spectrum) and XRD (X-ray diffraction) examinations reveal that the predominant failure mechanism is oxidative wear.

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