Effect of Mg2Si Concentration on the Dry Sliding Wear Behavior of Al–Mg2Si Composite

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
Prosanta Biswas ◽  
Manas Kumar Mondal ◽  
Durbadal Mandal
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Wear Resistance ◽  
Optical Microscopy ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Primary Mg2si ◽  
Scanning Electron

The microstructural morphology and wear behavior of as-cast Al–X wt% Mg2Si (X = 0.0, 5.0, 10.0, 15.0, and 20.0) composites were investigated through optical microscopy (OM), energy dispersive X-ray (EDX) spectrometry, scanning electron microscopy (SEM), and field emission scanning electron microscopy (FESEM). The dry sliding wear behavior was studied against an EN 31 hardened steel disk at four different applied loads (19.6 N, 29.4 N, 39.2 N, and 49 N) with a sliding speed of 62.8 m/min for 1 h. The optical microscopy analysis exhibits that the primary Mg2Si particles average equivalent diameter and volume fraction are increased with an increase in Mg2Si (Mg and Si) concentration in the Al–Mg2Si composite. Therefore, the bulk hardness of the composites is increased, whereas the primary Mg2Si hardness decreased because the coarser primary Mg2Si particles have less compactness. The wear resistance of the commercially pure aluminum significantly improved due to Mg2Si reinforcement, and the wear resistance is increased with the increase in Mg2Si concentration up to 15.0 wt% and then decreased at 20.0 wt%. The tested composites worn surfaces and debris exhibit adhesion, delamination, microcutting-abrasion, abrasive- and oxidation-type wear mechanism.

scholarly journals Dry Sliding Tribological Properties of a Hard Anodized AA6082 Aluminum Alloy

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 207
Author(s):  
Eleonora Santecchia ◽  
Marcello Cabibbo ◽  
Abdel Magid Salem Hamouda ◽  
Farayi Musharavati ◽  
Anton Popelka ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Wear Behavior ◽  
Structure Characterization ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Alumina Layer ◽  
Wide Range ◽  
Wear Tests ◽  
Scanning Electron

The applications of aluminum and its alloys are still limited by low hardness and low wear resistance properties. Surface modifications, such anodizing and plasma electrolytic oxidation, represent a feasible way to overcome these drawbacks. In this study, discs of AA6082 were subjected to the so-called G.H.A. hard anodizing process leading to an anodized layer having a honeycomb-like structure. Samples having alumina layer thicknesses of 10, 50 and 100 μm were subjected to unidirectional dry sliding wear tests, using bearing steel and silicon nitride as counterbody materials. Surface and structure characterization of the samples were performed before and after the tribological tests, using a wide range of techniques; atomic force microscopy and scanning electron microscopy techniques were used before the wear tests. The wear scars were characterized by scanning electron microscopy, energy dispersive spectroscopy and Fourier transform infrared spectroscopy techniques. Results show that the different thickness of the anodized layer does not affect the pores dimensions but has an influence on the micrometric domains in which the pores are divided. These features coupled with the wear test conditions, show to have a strong influence on the wear behavior. The thinnest sample showed also the best performance against the ceramic counterbody.

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

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 296 ◽  
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.

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

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1618 ◽  
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.

scholarly journals “An Investigation of wear behavior of TiO2 nanoparticles mixed with Hybrid powder coating on MS material”

2021 ◽  
Vol 9 (12) ◽  
pp. 2350-2355
Author(s):  
Akshay Shinde
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Tio2 Nanoparticles ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Powder Coating ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Maximum Contribution

Abstract: To improve the wear resistance of the hybrid powder coating, TiO2 nanoparticles was hot mixed to form a homogenous mixture with the powder in the range varying wt. dry sliding wear test conducted to determine the wear resistance. The experiments were design according to Taguchi L9 array to find the optimum nanoparticles content required to minimize the wear rate of the coating. ANOVA was used to determine the effect of the parameters on wear rate. It showed that reinforcement has the maximum contribution on the wear rate of the coating as compared to load and frequency. From the graph of means optimum parametric values was obtained at 2 % wt of reinforcement, 2 N load and 2 Hz frequency. The wear rate decrease with the increase in reinforcement. Keywords: Taguchi Method, Tribometer, Hybrid powder, TiO2, Wear Rate.

Effect of Load on the Tribology Behavior of Cu-Based Self-Lubricating Composite

2013 ◽  
Vol 423-426 ◽  
pp. 24-27
Author(s):  
Run Guo Zheng ◽  
Xin Xing Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sliding Wear ◽  
Adhesive Wear ◽  
Wear Behavior ◽  
Normal Load ◽  
Fatigue Wear ◽  
Electrical Currents ◽  
Pin On Disc ◽  
Scanning Electron

Sliding wear behavior of the (NbSe2+SiC)/Cu composite was studied on a pin-on-disc wear tester under various electrical currents and applied loads. The worn surfaces were characterized using scanning electron microscopy and energy dispersive spectroscopy to probe the wear mechanisms. Experiment results show that the friction coefficient and wear rate of (NbSe2+SiC)/Cu composite increased with increasing of the normal load. Adhesive wear, abrasive wear and fatigue wear were the main wear mechanism during the sliding process.

Dry sliding wear of a Ni-based superalloy as a function of the aging time.

MRS Advances ◽  
2020 ◽  
Vol 5 (59-60) ◽  
pp. 3091-3102
Author(s):  
Luis E. Gonzalez A. ◽  
Arnoldo Bedolla-Jacuinde ◽  
Eduardo Cortés C ◽  
Francisco V. Guerra ◽  
A Ruiz
Keyword(s):  
Electron Microscopy ◽  
Wear Resistance ◽  
Aging Time ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Vacuum Induction Furnace ◽  
Ceramic Mold ◽  
Wear Volume ◽  
Dry Sliding ◽  
Worn Surface

AbstractFrom the present work, the wear behavior of aged Ni-based superalloy was analyzed under dry sliding conditions. Such alloy was melted in a vacuum induction furnace and cast into a ceramic mold. Then the alloy was solubilized at 1080°C for 4 hours and then aged at 760°C for 4, 8, 16, 24, 48, 72 and 150 hours. The alloy was characterized as-cast and also in the heat-treated conditions by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). Mechanical characterization included just Vickers hardness and wear resistance under dry sliding conditions by a block on ring configuration according to the ASTM G77 standard. Wear tests were undertaken for 2000 m at a speed of 0.7 ms-1 at two different loads (25 and 78 N). The worn samples were analyzed by an optical profiler to determine the wear volume and by SEM to analyze the worn surface and the microstructure below the worn surface. The main findings indicate the formation of an oxide layer mainly formed by Cr and Ni during sliding. The thickness of such a layer is about 10 μm for short aging times and about 5 μm for longer aging times. For this load, the wear resistance was 50% higher for the shorter aging times than that for the longer aging times. This behavior is described in terms of the thickness of the protecting layer, and on the availability of chromium to form such a layer since it forms Cr23C6 at long aging times. On the other hand, for a load of 78 N the wear behavior is in agreement with hardness. Wear resistance increases with aging time due to the higher precipitation of prime gamma phase.

Dry Sliding Wear of As-Cast and Thermomechanically Processed Low Chromium White Cast Iron

2013 ◽  
Vol 797 ◽  
pp. 725-730
Author(s):  
Xing Jian Gao ◽  
Qi Zhang ◽  
Dong Bin Wei ◽  
Si Hai Jiao ◽  
Zheng Yi Jiang
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Thermomechanical Treatment ◽  
Sliding Wear ◽  
White Cast Iron ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Low Carbon ◽  
Wear Process

This investigation attempts to improve the wear resistance of low chromium white cast iron (LCCI) by thermomechanical treatment. The thermomechanical treatment of the brittle LCCI with crack-free was successfully carried out by bonding it with a ductile low carbon steel firstly. Afterwards the dry sliding wear behavior of as-cast (LCCI-A) and thermomechanically processed (LCCI-B) samples was studied using a pin-on-disc apparatus under different test conditions. The microstructural examination shows that the refined supercooled austenite and plenty of secondary carbides in LCCI-B replaced the original microstructure of martensite and retained austenite with network carbide in LCCI-A. This significant evolution is beneficial to form and stabilise the oxide layer on the substrate, which makes the oxidational wear rather than abrasive wear or delamination dominating the wear process so that the improvement of the wear resistance of LCCI was achieved by hot working.

Dry Sliding Wear Behavior and Wear Mechanisms of Thermally Sprayed WCCo-Coatings

2015 ◽  
Vol 788 ◽  
pp. 143-150
Author(s):  
Alexandra Gontarenko ◽  
Kai Möhwald ◽  
Todd Alexander Deißer ◽  
Hans Jurgen Maier
Keyword(s):  
Wear Resistance ◽  
Sliding Wear ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Thermal Spraying ◽  
High Wear Resistance ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Thermally Sprayed

Thermal spraying is one of the most efficient methods to deposit hard wear resistant coatings. The coatings deposited by High-Velocity-Oxygen-Fuel spraying (HVOF) are characterized by high wear resistance and outstanding tribological characteristics. One of the most challenging tasks for tribologists is to develop surface treatments that allow for both operating the component without lubricants and at the same time minimize wear. WC-based cermets are a group of thermally sprayed coatings known to have high wear resistance under sliding friction conditions. An experimental study on the dry sliding wear behavior of WCCo HVOF-sprayed coating deposited onto a steel substrate is presented in the current paper. A pin-on-disc tribometer was used to carry out the wear tests.

Dry Sliding Wear Behavior of Fe-Ni-Mo-C-Cr Powder Sintered Structural Steel

2012 ◽  
Vol 433-440 ◽  
pp. 572-577
Author(s):  
Hua Chen ◽  
Hai Ying Sun ◽  
Zhan Kui Zhao ◽  
Zhi Long Chai
Keyword(s):  
Wear Resistance ◽  
Wear Mechanism ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Hot Forging ◽  
High Wear Resistance ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Delamination Wear ◽  
Cr System

Fe-Ni-Mo-C-Cr system powder metallurgy in the as-sintered was investigated on pin-on-rolling wear tester for their dry sliding wear behavior. The morphology of worn surfaces and wear mechanism were analysed by SEM. Results show the hot-forging deformation quenching and tempered considerably decreased the porosity and improved wear resistance, and compare with quenching microstructure, tempered microstructure has high wear resistance and match of strength-toughness. Fe-2.0Ni-0.4Mo-0.5C-0.6Cr alloy presented best wear characteristics. SEM observations of the worn surface revealed microploughing and plastic deformation and crack were the basic dry sliding wear morphology,and oxidative wear and delamination wear are dominant wear mechanism.

scholarly journals Wear Behavior of the Multiheterostructured AZ91 Mg Alloy Prepared by ECAP and Aging

Scanning ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Bingqian Xu ◽  
Jiapeng Sun ◽  
Zhenquan Yang ◽  
Jing Han ◽  
Dan Song ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Wear Mechanism ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Cast Alloy ◽  
High Strength ◽  
Mg Alloy ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Strength And Ductility

The microstructure design based on the development of heterostructure provides a new way for high strength and ductility Mg alloys. However, the wear property, as an important service performance, of Mg alloys with heterostructure is scarcely investigated. In this work, a high strength and ductility AZ91 Mg alloy with multiheterostructure was prepared via a processing route combined industrial-scale equal channel angular pressing (ECAP) and aging. The multiheterostructure consists of the heterogeneous grain structure and heterogeneous precipitates. The dry sliding wear behavior of this multiheterostructured (MH) alloy is investigated compared to the as-cast alloy. The impacts of the applied load and duration time on the wear volume and coefficient of friction (COF) are analyzed, and the wear mechanism is further discussed. The result indicates that although the MH alloy exhibits high-desirable strength-ductility synergy, it shows a poorer wear resistance but a relatively lower COF compared to the as-cast alloy at the present condition. The wear mechanism of both alloys mainly involves abrasive wear, as well as mild adhesion, delamination, and oxidation. In comparison, the MH alloy shows relatively severe adhesion, delamination, and oxidation. The poor wear resistance of the MH alloy at the present dry sliding wear condition is linked to the abundant grain boundaries and fine precipitates. Therefore, one should reasonably use the MH Mg alloy considering the service conditions to seek advantages and avoid disadvantages.

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