Dry rolling/sliding wear of nanostructured pearlite

Subhankar Das Bakshi, A. Leiro, B. Prakash and H.K.D.H. Bhadeshia

Abstract

The dry rolling-sliding wear behaviour of pearlite that has an interlamellar spacing of just 85\,nm has been characterised. Its wear resistance is found to be comparable to that of much harder bainitic steels. Microstructural observations indicate that there is substantial plastic deformation of both the ferrite and cementite components of the pearlite in the vicinity of the wear surface. The plasticity is not expected from Hertzian analysis that assumes a smooth contact surface. It is likely instead to be a consequence of exaggerated stresses due to surface roughness. The material remains ductile to shear strains of the order of 4. Diffraction data indicate that the coherent domain size is reduced to about half the interlamellar spacing and that some of the cementite may dissolve and contribute to the expansion of the lattice parameter of ferrite.

Materials Science and Technology 31 (2015) 1735-1744.

Download paper

Related papers

1. "Stability, Wear Resistance and Microstructure of Fe-Cr-C and Fe-Cr-Si-C Hardfacing Alloys"
   Proceedings of Heat Treatment 1987,
   Institute of Metals, London, July 1988, pp. 39-43.
   S. Atamert and H.K.D.H. Bhadeshia
2. "Comparison of the Microstructures and Wear Properties of Stellite
   Hardfacing Alloys Deposited by Arc Welding and Laser Cladding"
   Metallurgical Transactions A, Vol. 20A, 1989, pp. 1037-1054.
   S. Atamert and H. K. D. H. Bhadeshia
3. "Three-body abrasive wear of fine pearlite, nanostructured bainite and martensite"
   Wear 308 (2013) 46-53.
   Subhankar Das Bakshi, P. H. Shipway, H.K.D.H. Bhadeshia
   
4. "Dry rolling/sliding wear of nanostructured bainite"
   Wear 316 (2014) 70-78.
   Subhankar Das Bakshi, A. Leiro, B. Prakash and H.K.D.H. Bhadeshia
   
5. "Formation of Nanostructured Steels by Phase Transformation"
   Scripta Materialia, Vol. 51, 2004, 767-770.
   T. Yokota, C. Garcia-Mateo and H. K. D. H. Bhadeshia