Improvement in Wear Resistance Performance of CuAl8Fe3 Single-Phase Aluminum Bronze via Slide Diamond Burnishing

2021 ◽  
Author(s):  
G. V. Duncheva ◽  
J. T. Maximov ◽  
A. P. Anchev ◽  
V. P. Dunchev ◽  
Ya. B. Argirov
Keyword(s):  
Wear Resistance ◽  
Single Phase ◽  
Aluminum Bronze ◽  
Diamond Burnishing ◽  
Resistance Performance ◽  
Slide Diamond Burnishing

Experimental study on the influence of friction pair material hardness on the tribological behaviors of water lubricated thrust bearings

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Xingxin Liang ◽  
Zhiyong Yang
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Abrasive Wear ◽  
Friction Pair ◽  
Aluminum Bronze ◽  
Heavy Load ◽  
Content Type ◽  
Thrust Bearings ◽  
Tribological Behaviors ◽  
Polymer Bearing

Purpose This paper aims to confirm that increasing the hardness of thrust collars can improve the load carrying capacity (LCC) and wear resistance of water lubricated thrust bearings (WTBs) made of polymers paired with non-polymeric thrust collars, and to design a WTB with high LCC and durability for a shaftless pump-jet propulsor of an autonomous underwater vehicle. Six kinds of WTBs were manufactured by matching aluminum bronze, stainless steel and silicon nitride with two different polymer bearing materials. Their tribological behaviors were tested and compared. Design/methodology/approach The tribological behaviors of the WTBs made with different materials were investigated experimentally on a specially designed test rig. Findings Aluminum bronze is not suitable for crafting thrust collars of heavy load WTBs due to severe abrasive wear. Two body abrasive wear first occurred between the thrust collar and the polymer bearing. Next, aluminum bronze wear particles were produced. The particles acted between the two materials and formed three body abrasive wear. Stainless steel/polymer bearings showed better wear resistance while Si3N4/polymer bearings were the best. Improving the hardness of thrust collars is significant to the LCC and service life of WTBs. Originality/value The wear mechanism of WTBs under heavy load conditions was revealed. Improving the hardness of the thrust collar was confirmed to be a preferable method to improve the wear resistance and LCC of WTBs. The results of this study may provide an important reference for the selection of water lubricated materials and the design of heavy load WTBs.

scholarly journals Enhancement of fatigue life of rail-end-bolt holes by slide diamond burnishing

2014 ◽  
Vol 2 (4) ◽  
pp. 247-264 ◽  
Author(s):  
J. T. Maximov ◽  
G. V. Duncheva ◽  
A. P. Anchev ◽  
I. M. Amudjev ◽  
V. T. Kuzmanov
Keyword(s):  
Fatigue Life ◽  
Diamond Burnishing ◽  
Bolt Holes ◽  
Slide Diamond Burnishing

scholarly journals Precipitation Hardening of the HVOF Sprayed Single-Phase High-Entropy Alloy CrFeCoNi

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 701
Author(s):  
Martin Löbel ◽  
Thomas Lindner ◽  
Ralph Hunger ◽  
Robin Berger ◽  
Thomas Lampke
Keyword(s):  
Wear Resistance ◽  
Single Phase ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Thermal Spray Process ◽  
Spray Process ◽  
Production Route ◽  
Hvof Thermal Spray ◽  
Material Usage ◽  
Hvof Thermal Spray Process

The application of high-entropy alloys (HEA) in surface technology has great potential due to the high corrosion and wear resistance. A further improvement can be achieved by applying thermochemical treatments. Powder-pack boriding enables the formation of a protective precipitation layer. This process has already been applied for cast HEAs causing the formation of a diffusion-enriched surface layer and a distinct increase in wear resistance. In the current investigations, the alloy CrFeCoNi with a single-phase face-centred cubic (fcc) structure is considered. An efficient application can be achieved by limiting the material usage of HEAs to the surface. Therefore, the high-velocity-oxygen-fuel (HVOF) thermal spray process is applied. Boriding was conducted with an adapted powder-pack routine. Furthermore, borided bulk HEAs were considered as a reference. The influence of the production route and boriding treatment on the microstructure, phase formation, and properties was investigated in detail. For the coating and the cast HEA, a precipitation layer is formed. Hence, the hardness and wear resistance are significantly increased. The current study proves the suitability of the investigated process combination.

Wear Behavior of White Layer in Plasma Nitrided H13 Steel at Ambient and Elevated Temperatures

2009 ◽  
Vol 83-86 ◽  
pp. 41-48 ◽  
Author(s):  
Amir Mahmoudi ◽  
Mohamad Esmailian
Keyword(s):  
Wear Resistance ◽  
Elevated Temperature ◽  
Single Phase ◽  
Elevated Temperatures ◽  
Wear Behavior ◽  
White Layer ◽  
H13 Steel ◽  
Aisi H13 Steel ◽  
Pin On Disc ◽  
Aisi H13

In this study, AISI H13 steel was plasma nitrided in two different atmospheres, containing 25%N2-75%H2 and 4%N2-96%H2 at a constant temperature of 530oC and 6h-holding time. Dry wear behavior of nitrided samples was determined with pin-on-disc method at 25oC and 500oC, under 10N and 30N loads. The results indicated that the nitrided steels, which had a thin multiple phases white layer (produced at 4%N2-96%H2 atmosphere), didn’t have any wear resistance in ambient and elevated temperatures. However, the nitrided steels, having thick single phase white layer (produced at 25%N2-75%H2 atmosphere), showed better wear resistance in ambient temperature than in elevated temperature.

Experimental Study on Wear-Resistance of Machined Surface in High Speed Milling Aviation Aluminum Alloy

2012 ◽  
Vol 500 ◽  
pp. 117-122
Author(s):  
Xiu Li Fu ◽  
Xiao Qin Wang ◽  
Yong Zhi Pan ◽  
Yang Qiao
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Friction Coefficient ◽  
Surface Quality ◽  
Feed Rate ◽  
High Speed ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Machined Surface ◽  
Resistance Performance

The wear-resistance performance of machined surface is an important factor in the evaluation of surface quality and precision in aerospace manufacturing industry. By using high-speed Ring-Block friction and wear machine (MRH-3), the influence of cutting parameters in milling aluminum alloy 7050-T7451 on wear-resistance of machined surface including friction coefficient and wear quantity are experimentally investigated. The wear-resistance is particularly sensitive to cutting speed and feed rate. The friction coefficient has marked drop trends as cutting speed increases. The influence of cutting speed on wear quantity is more complicated and the tendency of wear quantity was ascend in first and descend at last (v>900/min). The results show that the influence of cutting parameters on wear-resistance was also positively correlated with surface roughness and work-hardening of machined surface. The high work-hardening and surface quality had the promoting effecting on wear-resistance. The experiment and analysis results show that the machined surface by high speed cutting and lower feed rate has more superior in surface quality and wear-resistance performance comparing with conventional cutting speed.

scholarly journals Contribution In Determining The Fatigue Endurance of Slide Diamond Burnishing AISI52100 Steel Components

2021 ◽  
Author(s):  
Ouahiba Taamallah ◽  
Hamid Hamadache ◽  
Abdelaziz Amirat ◽  
Ouzine Boussaid
Keyword(s):  
Fatigue Resistance ◽  
Maximum Stress ◽  
High Stress ◽  
Ultimate Tensile Stress ◽  
Fatigue Tests ◽  
Bending Fatigue ◽  
Diamond Burnishing ◽  
Slide Diamond Burnishing ◽  
Fatigue Endurance ◽  
Good Agreement

Abstract The present paper is an investigation on the effect of slide diamond burnishing on the fatigue endurance of a component made of AISI52100 steel. Burnishing operation has been performed on cylindrical specimens using optimal parameters statistically selected such as burnishing force, burnishing feed and number of tool passes. Bending fatigue tests in air at R= -1 and S-N curves have been plotted by incrementing the applied stress from a maximum stress level of about 66% of the ultimate tensile stress to a stress value below which fatigue does not occur. Results show that slide diamond burnishing has increased the fatigue resistance comparing to unburnished specimens. The fatigue endurance is respectively 222 MPa and 190 MPa. At high stress levels, the fatigue resistance improvement is clearly observed and the fatigue trends are in good agreement with those reported in literature. However, the present results are slightly lower and that is attributed to the shoulder fillet value of the specimen. For small fillet radius, fatigue resistance is lowered.

Wear resistance performance of boron nitride coatings on end milling cutters

2017 ◽  
Vol 10 (3) ◽  
pp. 206
Author(s):  
Baris Çetin ◽  
Goksel Durkaya ◽  
Huseyin Kurtuldu ◽  
Tugce Hacaloglu ◽  
Merve Gurbuz ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Boron Nitride ◽  
End Milling ◽  
Nitride Coatings ◽  
Resistance Performance
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