Temperature sliding wear

Interest in elevated temperature sliding wear has been generated in recent years. A compilation of the relevant literature is presented in ref. [20]. On the basis of the reported literature, the important features of elevated temperature sliding wear are described below. 

The features of these layers were validated by Pauschitz et al. [79,21] using a series of systematic but comprehensive experiments. The formation of these layers and their failure mechanisms are presented in Fig. 6.16 schematically [79]. Their presence can explain all the observed behaviour of elevated temperature sliding wear of metallic materials [20]. Furthermore, by carrying out systematic chemical analysis of the worn surface and the wear debris it is possible to identify the various types of layers that form during elevated temperature wear. Further, systematic study by optical interferometer can also identify the types of layers that form and their failure mechanisms. By using both methods a complete failure analysis of the worn surface can be carried out without destroying the wearing sample. 

Schematic representation of the various types of layers that formed during elevated temperature sliding wear and their failure mechanisms [24]. 

The elevated temperature wear behaviour of metals and alloys has been reviewed in a systematic and brief manner. Wear of metallic materials at elevated temperature is receiving increased attention in recent times. Technological developments in all fields of science and engineering are resulting in development of materials capable of operating in demanding and harsh environments. Research and development into elevated temperature sliding wear of metals and alloys has been quite limited in this respect. 

The search for complete understanding of friction properties led to the methods (17), (18) accounting for the combined effects of the main factors. Prom Ref. (l ) relations are found for the friction coefficient, temperature, wear rate versus sliding velocities and loads. Then by the data obtained, a set of curves is drawn in P — V coordinates, having the same values of the friction coefficient, temperature, and wear rate. It is clear that great difficulties arise in obtaining and using this volume of information. Crease (j ) finds only... 

The exceedingly long molecular chains ofthe UHMWPE molecule yield a material with excellent impact strength, sliding wear abrasion resistance and cold temperature properties. In applications requiring such properties, UHMWPE is the material of choice. The long chains are also responsible for... 

Figure 15.6 Sliding wear-corrosion of nickel aluminum bronze in 3.5% NaCI solution at 35 N and room temperature.

Y. Sun and T. Bell Dry sliding wear resistance of low temperature plasma carburised austenitic stainless steel, Wear (2002) 253,5-6, 689-693... 

Y. Sun and T. Bell Effect of layer thickness on the rolling-sliding wear behavior of law- temperature plasma-carburized austenitic stainless steel. Tribology Letters (2002) 13,1, 29-34 Y. Sxm, Kinetics of low temperature plasma carburizing of austenitic stainless steels, J. Mater. Proc. Tech. 168 (2005) 189-194. 

Choi, H.J. et al. Sliding wear of sihcon carbide modified by etching with chlorine at various temperatures. Wear 266, 214-219, 2009. 

Sliding wear behaviour of nanocrystalline Cr3C2-25(Ni20Cr) coatings at elevated temperature... 

Paper IV (iii) Sliding Wear Behayiour of Nano-Crystalline Cr C -lSfNilOCrl Coatings at Eleyated Temperature by Mr M Roy, Dr A Pauschitz and Professor F Franek (Vienna University of Technology, Vienna, Austria)... 

Sliding Wear Behaviour of Nanocrystalline Cr3C2-25(Ni20Cr) Coatings at Elevated Temperature 141... 

Various types of sliding wear, erosive wear and abrasive wear test rigs are discussed in this section. These test rigs are designed primarily for testing at elevated temperature. 

Important features of elevated temperature tribological degradation sliding wear... 

Significant developments in high temperature tribology have been reported recently. However, most of these developments are confined to sliding wear and erosive wear only. As mentioned previously, the literature on elevated temperature abrasive wear is rather limited. Consequently, no effort is made here to highlight recent developments in high temperature abrasive wear. 

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