Effects of Contact Load on Fretting Wear of Al-Si Alloy Impregnated Graphite Composite

2005 ◽  
Author(s):  
H. Goto ◽  
Y. Amamoto
Keyword(s):  
Friction And Wear ◽  
Bearing Steel ◽  
Fretting Wear ◽  
Contact Load ◽  
Moist Air ◽  
Graphite Composite ◽  
Wear Characteristics ◽  
Contact Loads ◽  
Wear Tests ◽  
Friction And Wear Characteristics

An Al-Si alloy impregnated graphite composite (ALGR-MMC) containing a large amount of graphite (56 vol%) has been newly developed to improve the friction and wear characteristics of machine components such as clutches under dry sliding and journal bearings under lubricated sliding. The ALGR-MMC has the same self-lubricating performance as graphite in moist environments. It has good properties of thermal expansion, heat resistance and wear resistance. The objective of this study is to investigate the friction and wear of the ALGR-MMC under fretting conditions. Ball-against-disk type fretting wear tests for the ALGR-MMC (flat) in contact with bearing steel (ball) were conducted at various contact loads in moist air under unlubricated conditions. The friction coefficient was monitored during the tests. The area and depth of wear scars were measured after the tests or in the interrupted tests. From the friction and wear data, the effects of contact load on the fretting wear characteristics of the ALGR-MMC were evaluated with SEM observations of wear scars and EPMA analyses of wear surfaces.

Friction and Wear Characteristics of Aluminum Alloy Impregnated Carbon Composite

1999 ◽  
Vol 121 (2) ◽  
pp. 294-300 ◽  
Author(s):  
Hozumi Goto ◽  
Shunji Omori
Keyword(s):  
Aluminum Alloy ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Carbon Composite ◽  
Bearing Steel ◽  
Surface Films ◽  
Wear Characteristics ◽  
The Matrix ◽  
The Coefficient Of Friction ◽  
Friction And Wear Characteristics

Pin-on-disk unidirectional sliding friction and wear experiments for an aluminum alloy impregnated carbon composite in contact with a bearing steel were carried out at various levels of contact load in wet and dry air. The aluminum alloy impregnated carbon composite exhibits better friction and wear characteristics than the matrix materials, aluminum alloy and graphite in wet air. The coefficient of friction and wear rate decrease, especially at high loads in wet air. Graphite, together with metallic and oxidative wear particles, adheres to the disk sliding surface of the bearing steel, resulting in the formation of compacted, uniform surface films. The films prevent metal-to-metal contact, achieving a good sliding friction and wear condition.

Sliding Wear Characteristics of High-Performance Plasma Nitrided Bearing Steel

2012 ◽  
Vol 591-593 ◽  
pp. 873-879
Author(s):  
Sheng Guan Qu ◽  
Guang Hong Wang ◽  
Li Kui Liu ◽  
Yong Hu ◽  
Xiao Qiang Li
Keyword(s):  
High Performance ◽  
Sliding Wear ◽  
Friction And Wear ◽  
Plasma Nitriding ◽  
Normal Load ◽  
Nitrided Layer ◽  
Bearing Steel ◽  
Fretting Wear ◽  
Wear Characteristics ◽  
Nitrided Surface

Plasma nitriding technology was carried out on the surface of bearing steels. The phase composition and microhardness of the nitrided layer were analyzed. Sliding wear characteristics of the nitriding steel were studied on an Optimol SRV IV oscillating friction and wear tester at room temperature. The fretting wear mechanism was investigated with scanning electron microscopy (SEM) and 3D surface profiler. The results showed that Cr2N, Fe4N, Fe2 ~ 3N phases were observed on the nitrided surface layers; lubricating condition, normal load and friction velocity have great effect on the friction and wear characteristics of the plasma nitrided steels.

Friction and Wear Characteristics of Diamond-Like Carbon (DLC) Coating Used for Machine Elements

2011 ◽  
Author(s):  
D. W. Kim ◽  
K. W. Kim
Keyword(s):  
Friction And Wear ◽  
Normal Load ◽  
Bearing Steel ◽  
Wear Rates ◽  
Dlc Coating ◽  
Aisi 52100 ◽  
Machine Elements ◽  
Wear Tests ◽  
Friction And Wear Characteristics ◽  
Friction And Wear Tests

In this study, friction and wear tests were performed in order to investigate the effect of sliding velocity and normal load on the friction and wear characteristics of multi-layered diamond-like carbon (DLC) coating used for machine elements (automotive engine tappet, etc). Friction and wear tests against AISI 52100 bearing steel ball were performed under various sliding velocities (0.25, 0.5, 1 and 2 m/s) and normal loads (6.13, 20.7 and 49.0 N). As a result of test, kinetic friction coefficients and wear rates of multi-layered DLC coating and AISI 52100 bearing steel were obtained under each test condition. The result showed that the kinetic friction coefficients and wear rates generally decreased with the increase in sliding velocity and normal load.

scholarly journals Wear and Friction Characteristics of 65Mn Steel for Spike-Tooth Harrow

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 319
Author(s):  
Zhiguo Lu ◽  
Chuanyu Du ◽  
Qingcai Chen ◽  
Tianying Niu ◽  
Na Wang ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Working Environment ◽  
Manganese Steel ◽  
Wear Loss ◽  
Variable Parameters ◽  
Wear Characteristics ◽  
Before And After ◽  
Set Up ◽  
Worn Surface ◽  
Friction And Wear Characteristics

The friction and wear characteristics of spike-tooth material (65Mn steel) of Spike-Tooth Harrow in a two-stage peanut harvester were studied in this paper. The friction and wear tests of pin and disc on 65 manganese steel were carried out on the tribometer, then the wear loss and the friction coefficient were studied. The wear loss of the pin was acquired by calculating the mass of the pin before and after the experiment using an electronic balance. According to the actual working environment of peanut spring-finger, four variable parameters are set up: load, speed, soil moisture and soil type. The friction and wear characteristics of pins were studied under different loads, speeds and different soil environments. After wearing, the worn surface of the material was observed by scanning microscope and the wear mechanism was studied. The experimental results show that the wear of the pin increases with the increase of load and decreases with the increase of rotational speed in the same rotation number. Especially in the case of the sandy soil with 20% in moisture, a maximum wear loss of the pin is achieved.

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