The role of oxide-scale microtexture on tribological behaviour in the nanoparticle lubrication of hot rolling

Publication Type:
Journal Article
Citation:
Tribology International, 2016, 93 pp. 190 - 201
Issue Date:
2016-01-01
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© 2015 Elsevier Ltd All rights reserved. Electron backscatter diffraction (EBSD) of the microtexture in the tertiary oxide scale after hot rolling were investigated. The surface asperity flattening and grain refinement of Fe < inf > 3 < /inf > O < inf > 4 < /inf > were produced at a thickness reduction of 28% and a cooling rate of 28 °C/s. Microtexture development of Fe < inf > 3 < /inf > O < inf > 4 < /inf > manifests as a strong θ fibre parallel to oxide growth, including the {100} < 001 > and {001} < 110 > textured components, whereas the {0001}〈101〉0 > component dominates in α-Fe < inf > 2 < /inf > O < inf > 3 < /inf > as the favoured basal slip. The tribological effect of α-Fe < inf > 2 < /inf > O < inf > 3 < /inf > at the contact surface of steel and rolls was considered at low and high thickness reductions. The propagation of cracks along the Fe < inf > 3 < /inf > O < inf > 4 < /inf > grain boundaries could create a dish to collect nanoparticles during lubrication and thereby changed the wear rates.
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