High temperature Tribology is an interesting and challenging area which deserves more attention on wear resistance. The present investigation relates to understanding the surface roughness and hardness by the effect of different operational conditions like wear pressure, sliding speed and ambient temperature on AISI SAE 8630, 3140, and 9310.Dry sliding wear tests have been carried out on the materials AISI SAE 8630, 3140, and 9310 under room temperature and also at high temperatures like 200oC, 400oC and 600oC on pin on disc type wear testing machine for 10,000 m sliding distance. The wear tests were carried out under the operational conditions of three sliding speeds like 1, 3 and 5 m/s, under the wear pressures of 0.125 MPa, 0.375 MPa and 0.625 MPa.Weight loss was recorded after each wear test. Hardness after wear was measured by micro hardness tester under 100 gm wear pressure. Roughness of the worn-out surface along the parallel & perpendicular was measured by roughness instrument.

1. J. Jiang, et al, Some frictional features associated with the sliding wear of the nickel base alloy N80A at temperatures to 250C, Wear 176 (2) (1994) 185-194.
2. M. Cocks, Role of displaced metal in the sliding of fiat metal surfaces, 11. Journal of Applied Physics, 35 (1964) 1807-1814.
3. I. Sevim and I.B. Eryurek, Effect of abrasive particle size on wear resistance steels, Materials and Design 27 (2006), pp. 173–181.
4. H. Reshetnyak and J. Kübarsepp, Structure sensitivity of wear resistance of hard metals, International Journal of Refractory Metals and Hard Materials15 (1997), pp. 89–95.
5. D.H. Jeong, et al, The relationship between hardness and abrasive wear resistance of electrodeposited nanocrystalline Ni–P coatings, Scripta Materialia 48 (2003), pp. 1067–1072.
6. B.S. Mann and V. Arya, An experimental study to corelate water jet impingement erosion resistance and properties of metallic materials and coatings, Wear 253 (2002), pp. 650–661.
7. E.H.R. Wade and C.M. Preece, Cavitation erosion of iron and steel, Metallurgical Transactions A 9A (1978), pp. 1299–1309.
8. C.J. Heathcock, et al, Cavitation erosion of stainless steels, Wear 81 (1982), pp. 311–327.
9. L. Sitnik, Stromungs, Cavitations verschleiss, Publication House of Technical University in Wrocław, Wrocław, 2005.
10. T. H. C. Childs, The sliding wear mechanisms of metals mainly steels. Tribology International, 13 (1980) 285 - 293.
11. J. M. Challen and P. L. B. Oxley, An Explanation of the Different Regimes of Friction and Wear Using Asperity Deformation Models, Wear, 53 (1979) 299.

Ni Cr High temperature wear Surface Roughness