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Roller burnishing; surface roughness; microstructure; micro hardness; residual stresses; burnishing maps.

The present study is aimed at filling the gaps in scientific understanding of the burnishing process, and also to aid and arrive at technological solutions for the surface modifications based on burnishing of some of the commonly employed engineering materials. The effects of various burnishing parameters on the surface characteristics, surface microstructure, micro hardness are evaluated, reported and discussed in the case of EN Series steels (EN 8, EN 24 and EN 31), Aluminum alloy (AA6061) and Alpha-beta brass. The burnishing parameters considered for studies principally are burnishing speed, burnishing force, burnishing feed and number of passes. Taguchi technique is employed in the present investigation to identify the most influencing parameters on surface roughness. Effort is also made to identify the optimal burnishing parameters and the factors for scientific basis of such optimization. Finally, a brief attempt is made to construct the Burnishing maps with respect to strength level (in this case, average micro hardness of unburnished material).

P Ravindra Babu¹ K Ankamma² T Siva Prasad³ A V S Raju⁴ N Eswara Prasad⁵

1. Mechanical Engineering Department, Gudlavalleru Engineering College, Gudlavalleru 521 356, India
2. Mechanical Engineering Department, Mahatma Gandhi Institute of Technology, Hyderabad 500 075, India
3. Mechanical Engineering Department, C Mallareddy college of Engineering, Secunderabad 500 114, India
4. Mechanical Engineering Department, Jawaharlal Nehru Technological University, Hyderabad 500 072, India
5. Regional Centre for Military Airworthiness (Materials), CEMILAC, PO Kanchanbagh, Hyderabad 500 058, India

Published

August 2012

Manuscript received

25 June 2011

Manuscript revised

23 January 2012

Accepted

3 February 2012