Effect of Temperature and Humidity on Tribological Properties of Rail and Wheel Using Pin-On-Disc

This article concerns the tribological properties of three selected polymer materials: polyamide PA6, polyethylene PE-HD and polyetheretherketone composite PEEK/BG during sliding against aluminium alloy EN AW-2017A in the presence of hydraulic oil HLP 68. The tests were carried out under contact pressure p of 3.5–11 MPa at ambient temperature T ranging from −20 °C to +20 °C. The dependence of kinetic friction coefficient μk on the two parameters was determined through tribological tests carried out using a pin-on-disc tribometer. A five-level central composite rotatable design (CCRD) was adopted for the experiment. All the test results were statistically analysed. The microhardness of the surface of the polymeric material was measured before and after the friction process. The surface was also examined under SEM. Temperature and contact pressure have been found to have a significant effect on the tribological properties of the tested sliding pairs. Relative to the applied friction conditions, the surfaces after friction showed rather heavy signs of wear.

Download Full-text

Tribological Properties of Al2O3 Nanoparticles as Lithium Grease Additives

Lubricants ◽

10.3390/lubricants9010009 ◽

2021 ◽

Vol 9 (1) ◽

pp. 9

Author(s):

Ahmed Nabhan ◽

Ahmed Rashed ◽

Nouby M. Ghazaly ◽

Jamil Abdo ◽

M. Danish Haneef

Keyword(s):

Tribological Properties ◽

Wear Scar ◽

Al2o3 Nanoparticles ◽

Lithium Grease ◽

Pin On Disc ◽

Scar Width

The tribological properties of Lithium grease specimens with different concentrations of Al2O3 nanoparticles were investigated using a pin on disc apparatus under different sliding speeds and normal loads. Results showed that Al2O3 nanoparticles enhanced the tribological properties of lithium grease and reduced the COF and wear scar width by approximately 57.9% and 47.5% respectively.

Download Full-text

The Effect of Temperature and Humidity on the Losses of Nitrogenous Substances from the Skin of Ayrshire Calves

Research in Veterinary Science ◽

10.1016/s0034-5288(18)33711-1 ◽

1974 ◽

Vol 17 (1) ◽

pp. 75-80 ◽

Cited By ~ 14

Author(s):

D. McEwan Jenkinson ◽

R.M. Mabon ◽

W. Manson

Keyword(s):

Effect Of Temperature ◽

Temperature And Humidity ◽

Nitrogenous Substances

Download Full-text

The Effect of Temperature and Humidity Levels in a Protective Mask on User Acceptability During Exercise

AIHAJ ◽

10.1080/15298668791385336 ◽

1987 ◽

Vol 48 (7) ◽

pp. 639-645 ◽

Cited By ~ 23

Author(s):

R. NIELSEN ◽

A.R. GWOSDOW ◽

L.G. BERGLUND ◽

A.B. DuBOIS

Keyword(s):

Effect Of Temperature ◽

Temperature And Humidity ◽

User Acceptability ◽

Protective Mask

Download Full-text

Effect of temperature and humidity on reproductive performance of crossbred sows in Thailand

Theriogenology ◽

10.1016/j.theriogenology.2005.06.005 ◽

2006 ◽

Vol 65 (3) ◽

pp. 606-628 ◽

Cited By ~ 42

Author(s):

Annop Suriyasomboon ◽

Nils Lundeheim ◽

Annop Kunavongkrit ◽

Stig Einarsson

Keyword(s):

Reproductive Performance ◽

Effect Of Temperature ◽

Temperature And Humidity

Download Full-text

A Comparative Study of Tribological Behavior of Steel Sliding Against WC Under Mineral and Biodegradable Oil Lubrication

Volume 3: Design, Materials and Manufacturing, Parts A, B, and C ◽

10.1115/imece2012-87182 ◽

2012 ◽

Cited By ~ 1

Author(s):

Anup Darshan ◽

UmaMaheshwera Reddy Paturi ◽

Narala Suresh Kumar Reddy ◽

Srinivasa Prakash Regalla

Keyword(s):

Tribological Properties ◽

Positive Impact ◽

Research Work ◽

Mineral Oil ◽

Optical Microscope ◽

Machining Processes ◽

Alternative Source ◽

Pin On Disc ◽

Steel Disc ◽

Machining Operations

Now a days for machining operations apart from good tribological properties, the lubricant is also expected to be non-hazardous and non-polluting. When considering the ecological and environmental aspects in machining processes, the use of biodegradable oil can be an alternative source of lubricant due to its positive impact to employee health and environmental pollution. In this regard, our research work uses vegetable based cutting fluids developed from canola and sunflower oil, in an attempt to provide an eco-friendly environment. Experiments are carried out on a pin-on-disc tribometer with tungsten carbide (WC) pin against AISI 4340 steel disc for different sliding times under different environments, thus simulating the machining environment. The tribological properties, wear and friction of vegetable based oils were comparatively investigated with a commercially available mineral oil. Wear tracks and roughness profiles of test specimens were compared by using optical microscope and profilometer respectively. Results indicated that vegetable based canola oil demonstrated excellent tribological properties compared to that of commercial mineral oil.

Download Full-text