The Effect of Boron Nitride on Tribological Behavior of Mg Matrix Composite at Room and Elevated Temperatures

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Fatih Aydin ◽  
M. Emre Turan
Keyword(s):  
Boron Nitride ◽  
Wear Debris ◽  
Sliding Wear ◽  
Solid Lubricant ◽  
Elevated Temperatures ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Thermal Softening ◽  
Dry Sliding Wear ◽  
Worn Surface

Abstract The goal of the study is to examine the dry sliding wear behavior of pure Mg and Mg/nano-boron nitride (BN) composite at elevated temperatures. The wear behavior of the samples was evaluated under loads of 5, 10, and 20 N, at sliding speed of 80, 130, and 180 mm s−1 and at temperatures of 25, 100, and 175 °C. The examination of worn surface, counterface, and wear debris was performed. The results showed that nano-BN particles lead to substantial enhancement of wear resistance for both room and elevated temperatures. Mg/0.25 BN has lower coefficient of friction values due to the presence of BN which act as solid lubricant. The wear mechanisms are thermal softening, melting, oxidation, abrasion, and delamination.

Tribological Behavior of Al–20Si–5Fe–2Ni Alloy at Elevated Temperatures Under Dry Sliding

2018 ◽  
Vol 140 (3) ◽  
Author(s):  
Hui Tan ◽  
Jun Cheng ◽  
Shuai Wang ◽  
Shengyu Zhu ◽  
Yuan Yu ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Sintered Alloy ◽  
Aisi 52100 ◽  
Potential Applications ◽  
Aisi 52100 Steel ◽  
Worn Surface

Wear-resistant aluminum alloys have enormous potential applications. In this paper, the Al–20Si–5Fe–2Ni alloy was fabricated by hot-pressed sintering, and its dry sliding wear behavior was investigated from 25 °C to 500 °C sliding against Al2O3 ceramic and AISI 52100 steel. The microstructure, phase, high temperature hardness, and worn surface of the sintered alloy were examined. The results indicate that the uniform distribution of Si particles and Al5FeSi intermetallic in the Al matrix contribute to its superior tribological properties. Additionally, the correlation of the tribological behavior of the alloy with the sliding testing conditions was studied, and its wear mechanism was discussed.

Dry Sliding Wear Behavior of Hot Pressed Fe-28Al and Fe-28Al-10Ti Alloys

2011 ◽  
Vol 306-307 ◽  
pp. 425-428
Author(s):  
Jing Li ◽  
Xiao Hong Fan ◽  
De Ming Sun
Keyword(s):  
Plastic Deformation ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Long Distance ◽  
Wear Performance ◽  
Testing Conditions ◽  
Worn Surface

Fe-28Al and Fe-28Al-10Ti alloys were prepared by mechanical alloying and hot pressing. The phases and dry sliding wear behavior were studied. The results show that Fe-28Al bulk materials are mainly characterized by the low ordered B2 Fe3Al structure with some dispersed Al2O3 particles. Fe-28Al-10Ti exhibits more excellent wear resistance than Fe-28Al, especially after long distance sliding wear test. There are obvious differences in wear mechanisms of Fe-28Al and Fe-28Al-10Ti alloys under different testing conditions. Under the load of 100N, there is plastic deformation on the worn surface of Fe-28Al. The main wear performance of Fe-28Al-10Ti is particle abrasion, the characteristics of which are micro cutting and micro furrows, but micro-crack and layer splitting begin to form on the surface of Fe-28Al. Under the load of 200N, serious plastic deformation and work-hardening lead to rapid crack propagation and eventually the fatigue fracture of Fe-28Al. Plastic deformation is the main wear mechanism of Fe-28Al-10Ti under the load of 200N, which are characterized by micro-crack and small splitting from the worn surface.

scholarly journals Dry Sliding Wear Behavior and Mild–Severe Wear Transition of Mg97Zn1Y2 Alloy at Elevated Temperatures

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1735 ◽  
Author(s):  
Liang Li ◽  
Jihe Feng ◽  
Ce Liang ◽  
Jian An
Keyword(s):  
Test Temperature ◽  
Sliding Wear ◽  
Elevated Temperatures ◽  
Wear Behavior ◽  
Hardness Measurement ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Softening Effect ◽  
Severe Wear ◽  
Wear Transition

Dry sliding wear behavior of Mg97Zn1Y2 alloy was investigated at test temperatures of 50–200 °C under three sliding speeds of 0.8 m/s, 3.0 m/s and 4.0 m/s. The wear mechanisms in mild and severe wear regimes were identified by examination of morphologies and compositions of worn surfaces using scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDS), and from which wear transition maps under different sliding speeds were constructed on rectangular coordinate systems with applied load versus test temperature axes. It is found that under each sliding speed condition, mild–severe transition load decreases almost linearly within the test temperature range of 50 °C to 200 °C. Microstructure observation and hardness measurement in subsurfaces identify that the softening effect generating form dynamic crystallization (DRX) is the dominant mechanism for the mild–severe wear transition at elevated temperatures. The mild–severe wear transition at 50–200 °C follows the contact surface DRX temperature criterion, and the transition loads can be well evaluated using the criterion.

Dry Sliding Wear Behavior of Al2O3-TiC Ceramic Composites Added with Solid Lubricant CaF2by Cold Pressing and Sintering

2014 ◽  
Vol 58 (2) ◽  
pp. 231-239 ◽  
Author(s):  
Xuefeng Yang ◽  
Ziran Wang ◽  
Peilong Song ◽  
Jian Cheng ◽  
Jie Gu ◽  
...  
Keyword(s):  
Sliding Wear ◽  
Solid Lubricant ◽  
Wear Behavior ◽  
Ceramic Composites ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Cold Pressing

Experimental Research on the Friction and Wear Properties of Ni-Based Composite Coating Prepared by Laser Cladding

2013 ◽  
Vol 747-748 ◽  
pp. 152-157 ◽  
Author(s):  
Shu Fa Chen ◽  
Cheng Long Feng ◽  
Jin Yang ◽  
Jin Song Chen
Keyword(s):  
Sliding Wear ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Frictional Coefficient ◽  
Dry Sliding Wear ◽  
Wear Properties ◽  
Low Load ◽  
Moderate Load ◽  
Friction And Wear Properties ◽  
Worn Surface

In this study, the dry sliding wear behavior of Ni-based self-lubricating wear-resistant coating was characterized under various loads at 300 . Morphologies and compositions of the worn surface were analyzed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The experimental results showed that with the increase of load, both the frictional coefficient and wear rate decreased firstly, then slightly increased. A small amount of debris dispersed on the worn surface of the coating under low load (2 N). Since the effects of oxide layer and lubricant particles spreading onto the worn surface, the coating exhibited superior friction, and improved the wear properties under moderate load (5 N). As the load further increased, till up to 10N, the worn surface started to appear some shallow grooves and craters. This was contributed to the dispersion of carbides and lubricant particles.

Dry Sliding Wear Performance of A356 Alloy with Minor Additions of Magnesium

2014 ◽  
Vol 592-594 ◽  
pp. 175-180 ◽  
Author(s):  
M.S. Prabhudev ◽  
Virupaxi Auradi ◽  
Karodi Venkateshwarlu ◽  
S.M. Suresha ◽  
S.A. Kori
Keyword(s):  
Sliding Wear ◽  
Alloy Composition ◽  
Wear Behavior ◽  
A356 Alloy ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Performance ◽  
Mg Addition ◽  
Mg Content ◽  
Worn Surface

In the present investigation, effect of minor additions of magnesium (Mg) content on the dry sliding wear behavior of A356 alloy has been reported. Alloy composition, normal pressures and sliding distances on A356 alloy has been studied. The worn surfaces were characterized by SEM microanalysis. The results indicate that, the wear rate of A356 alloy increases with increase in normal pressures and sliding distances in all the cases and decreases with 0.7% Mg addition to the A356 alloy. This is due to the change in microstructure resulting in improvement of hardness and strength of the alloy. The worn surface study indicates that, the formation of oxide layer between the mating surfaces during sliding improves sliding wear performance.

Phase Transformation and its Effect on Dry Sliding Wear of Electro-Pressure Sintered Cobalt and Cobalt-Base Composites

2007 ◽  
Vol 539-543 ◽  
pp. 820-825 ◽  
Author(s):  
Yong Suk Kim ◽  
Suk Ha Kang ◽  
Tai Woong Kim
Keyword(s):  
Surface Layer ◽  
Cross Sections ◽  
Wear Debris ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Thermal Transformation ◽  
Xrd Analysis ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Fcc Phase

Room-temperature dry sliding wear behavior of hot-pressure sintered monolithic Co, Co- 20 wt.% CuSn and Co-20 wt.% WC composites were investigated. Wear tests of the materials were carried out using a pin-on-disk wear tester at various loads of 10N-100N under a constant sliding speed condition of 0.38m/s against glass (83% SiO2) beads. Sliding distances were varied with a range of 100m-600m. A scanning electron microscopy was used to examine worn surfaces, cross sections, and wear debris. X-ray diffraction (XRD) was utilized to identify phases of the specimen and wear debris. All specimens exhibited low friction coefficients ranging from 0.12 to 0.4. The sintered Co exhibited distinctive wear that was characterized by shallow dug canals on worn surface, a very thin detaching surface layer, and fine debris. Thermal transformation of the Co specimen from ε (hcp) phase to α (fcc) phase occurred during the wear of the Co, which was inferred from XRD analysis of the wear debris. The transformation was suggested to cause the thin detaching surface layer and the fine wear debris of the sintered Co. The wear of the Co-CuSn composite proceeded by shear deformation of the CuSn particles, while WC particles of the Co-WC composite sustained most of the applied load, which resulted in the low wear rate with fine wear debris of the Co-WC composite.

Dry-sliding wear behavior of AISI 4140 barrel steel at elevated temperatures

2020 ◽  
Vol 62 (2) ◽  
pp. 189-195 ◽  
Author(s):  
Fatih Koçyiğit ◽  
Fethullah Yıldız ◽  
M. Sabri Gök ◽  
Vedat Veli Çay
Keyword(s):  
Sliding Wear ◽  
Elevated Temperatures ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Aisi 4140

Composite reinforcement by oxide TiO2

2013 ◽  
Vol 20 (1) ◽  
pp. 7-14 ◽  
Author(s):  
Mehrdad Soltani ◽  
Seid Abbas Hoseininejad
Keyword(s):  
Wear Rate ◽  
Wear Debris ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Volume Loss ◽  
Transfer Layer ◽  
Pin On Disc ◽  
Sem Micrograph

AbstractThis composite has been developed by solidification processing by the addition of 0.5–3. 5 wt% powders of oxide TiO2 to molten Al-Cu alloy. The dry sliding wear behavior of pins of cast composite, fabricated by the solidification of the melt-particle slurry in mold, has been determined by pin-on-disc wear tests carried out conventionally and while removing wear debris by camel brush. The accumulated volume loss in composites increases linearly with increasing the sliding distance, and the wear rate increases more or less linearly with increasing load. The increasing particle content decreases the wear rate at a given load. The accumulated volume loss is considerably higher when the wear debris is removed by a camel brush during dry sliding wear. The relatively brighter compacted oxide transfer layer could be observed in the SEM micrograph of worn pin surfaces of the composites developed by the addition of TiO2. At higher loads, the oxide debris are expected to get better compacted to form the transfer layer, spread over a larger area of the sliding surface, and thus, their removal causes a larger wear compared to that without the removal of wear debris.

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