Showing papers by "Braham Prakash published in 2013"
TL;DR: In this paper, the wear resistance in dry rolling-sliding of nano-structured steels is significantly superior to that of bainitic steels transformed at higher temperatures with similar hardness values.
143 citations
TL;DR: In this paper, material transfer from Al-Si-coated work-piece to the tool material has been studied in order to evaluate the effect of galling in hot forming.
61 citations
TL;DR: In this article, an extensive review pertaining to the influence of operating service temperature on the tribological performance of self-lubricating coatings has been carried out, and ideas concerning possible ways to extend the operating temperature range of self lubes are presented as follows: hybridized tribological coating, adaptive tribological coatings, and diffusion rate limited solid lubricant coating.
Abstract: Self-lubricating coatings have been widely used to reduce friction in moving machine assemblies. However, the tribological performance of these coatings is strongly dependent on the service temperature. In this paper, an extensive review pertaining to the influence of operating service temperature on tribological performance of self-lubricating coatings has been carried out. Based on the effective lubricating temperature range, the self-lubricating coatings developed in the past have been divided into three groups: low temperature lubricant coating (from −200°C to room temperature), moderate temperature lubricant coating (from room temperature to 500°C) and high temperature lubricant coating (> 500°C). Ideas concerning possible ways to extend the operating temperature range of self-lubricating coatings have been presented as follows: hybridized tribological coating, adaptive tribological coatings, and diffusion rate limited solid lubricant coating. In addition, a new self-lubricating coating formulation for potential application at a wide operating temperature range has been proposed.
55 citations
TL;DR: Aluminium-based alloys present a number of interesting properties, such as lower density, corrosion resistance, thermal and electrical conductivity and good recyclability as mentioned in this paper, and there is...
52 citations
12 Mar 2013
TL;DR: In this paper, the authors investigated the tribological behaviour of several unfilled polymer materials sliding against 316L stainless steel in distilled water, and the tests were carried out in a unidirecti...
Abstract: This study aims at investigating the tribological behaviour of several unfilled polymer materials sliding against 316L stainless steel in distilled water. The tests were carried out in a unidirecti ...
44 citations
TL;DR: In this article, the effect of static and dynamic aging on the wear and friction behavior of aluminum alloy (AA 6082) sliding against tool steel (TS) surface has been studied, and the AA 6082 alloy samples used in the present study were in ascast, solutionized and peak aged conditions.
21 citations
TL;DR: In this article, the friction and wear performance of different polymeric materials having potential for hydraulic system components under lubricated sliding conditions against a steel counter face has been investigated using a pin-on-disc test configuration.
Abstract: This work is aimed at investigating the friction and wear performance of different polymeric materials having potential for hydraulic system components under lubricated sliding conditions against a steel counter face. A pin-on-disc test configuration was used for the experimental study. The different polymeric materials selected for these studies were commercial polyimides (PI), polyether ether ketone (PEEK), and flouropolymers. Some of these materials were bulk materials whereas others were used as coatings applied on to the cast iron substrate. The tribological characteristics of the polymers were compared with a reference grey cast iron. The frictional characteristics were evaluated in both static and dynamic conditions. The results have shown that by using polymeric materials it is possible to reduce breakaway friction by an order of magnitude compared to grey cast iron. However, the breakaway friction increased significantly after the wear tests. The polymeric materials having lowest breakaway friction have shown the highest wear with the exception of the PEEK-PTFE coating which showed low wear. PI with graphite fillers also showed low wear but it resulted in relatively high friction. The carbon fibre reinforced materials resulted in unstable friction as well as higher wear compared to the PI materials with graphite fillers.
8 citations
03 Jun 2013
TL;DR: In this article, the authors describe the properties of acrylonitrile-butadiene rubber elastomers, which are widely used in seal and tire industries, and their properties when exposed to a lubricant.
Abstract: Acrylonitrile-butadiene rubber elastomers are widely used in seal and tire industries. Physiochemical, surface and tribological properties of acrylonitrile-butadiene rubber exposed to a lubricant i ...
2 citations
01 Jan 2013
TL;DR: In this article, the influence of temperature on hardness and abrasive wear of hot forming tool steel and boron steel was investigated and shown to be a significant factor in hardness and wear.
Abstract: Influence of temperature on hardness and abrasive wear of hot forming tool steel and boron steel
1 citations
01 Jan 2013
TL;DR: The 4th International Conference Hot Sheet Metal Forming of High Performance Steel (HMSFHS) 2013 as mentioned in this paper was held in Lulea, Sweden, from June 9 to 12, 2013.
Abstract: Proceedings : 4th International Conference Hot Sheet Metal Forming of High Performance Steel June 9 - 12, 2013, Lulea, Sweden
1 citations
01 Jan 2013
TL;DR: Gebeshuber et al. as mentioned in this paper presented a survey of the state-of-the-art research institutions in the field of nanoelectronics at the University of Vienna, Austria.
Abstract: 1) Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), 43600 UKM Bangi, Malaysia 2) Institute of Applied Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10/134, 1040 Wien, Austria 3) State Key Laboratory of Tribology, Tsinghua University, 100084 Beijing, China 4) Department of Engineering Sciences and Mathematics, Machine Elements Division, Lulea University of Technology, Sweden 5) Institute of Micromechanics and Photonics, Warsaw University of Technology, Poland Corresponding author: gebeshuber@iap.tuwien.ac.at