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Magalhaes, L.
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Publications (6/6 displayed)
- 2012Low-loss austempered ductile iron gears: Experimental evaluation comparing materials and lubricantscitations
- 2011Low torque loss gears: austempered ductile iron versus carburized steelcitations
- 2008Austempered ductile iron (ADI) gears: Power loss, pitting and micropittingcitations
- 2005Artificial indentations for the study of contact fatigue of austempered ductile iron (ADI) discscitations
- 2004Contact fatigue behaviour of artificially indented austempered ductile iron discs
- 2000Experimental observations of contact fatigue crack mechanisms for austempered ductile iron (ADI) discscitations
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article
Experimental observations of contact fatigue crack mechanisms for austempered ductile iron (ADI) discs
Abstract
Collected from several twin-disc contact fatigue tests, images concerning crack development at ADI surfaces and sub-surfaces are presented. Several auxiliary surface analysis techniques were used (electronic scanning microscopy, video imaging and perfilometry). Defects found at these ADI samples are characterised and related to operating conditions. Elastohydrodinamic theory was used to evaluate surface tribological performance, involving parameters such as lubrication, roughness and general operating conditions. Results concerning a quick procedure to allow the evaluation of fatigue resistance properties among different ADI sample discs are also presented.