Nanoindentation Analysis of Evolved Bearing Steel under Rolling Contact Fatigue (RCF)
Authors: Abdullah, M.U., Khan, Z. and Kruhoeffer, W.
Conference: Tribology Frontiers
Dates: 9-13 November 2020
Journal: https://www.stle.org/images/PDF/STLE_ORG/TFC/2020/2020TFC_Preliminary_Program_10.14.pdf
Pages: 22-23
Publisher: 2020 STLE Tribology Frontier Virtual Conference Co-sponsored by ASME Tribology Division
Place of Publication: USA
Abstract:The bearing material operated under RCF is subjected to the triaxial stress state where work hardening followed by softening has been reported under the contact track. Such nonconformities (hardening/softening along with microstructural alterations) create complexities to model the cyclic hardening of bearing material under RCF. Current study presents a semi-empirical approach to evaluate the evolved subsurface response of bearing material with the help of a three-faced pyramidal Berkovich nanoindenter employing expanding cavity model for strain hardening materials. The expanding cavity model converts the localized measured hardness change to flow stresses which have been evolved during strain-hardening and microstructural phase changes of the bearing material. Moreover, to evaluate the representative stress-strain curve of the altered microstructure, a 5um spherical indenter was employed in a cyclic loading manner. The use of the spherical indenter with the integration of Field and Swain numerical model enables to extract the representative flow curve of the material at highly localized areas which cannot be possible even with miniature uniaxial tension/compression test.
https://eprints.bournemouth.ac.uk/34808/
https://www.stle.org/images/PDF/STLE_ORG/TFC/2020/2020TFC_Preliminary_Program_10.14.pdf
Source: Manual
Nanoindentation Analysis of Evolved Bearing Steel under Rolling Contact Fatigue (RCF)
Authors: Abdullah, M.U., Khan, Z.A. and Kruhoeffer, W.
Conference: 2020 STLE Tribology Frontier Virtual Conference
Pages: 22-23
Publisher: 2020 STLE Tribology Frontier Virtual Conference Co-sponsored by ASME Tribology Division
Abstract:The bearing material operated under RCF is subjected to the triaxial stress state where work hardening followed by softening has been reported under the contact track. Such nonconformities (hardening/softening along with microstructural alterations) create complexities to model the cyclic hardening of bearing material under RCF. Current study presents a semi-empirical approach to evaluate the evolved subsurface response of bearing material with the help of a three-faced pyramidal Berkovich nanoindenter employing expanding cavity model for strain hardening materials. The expanding cavity model converts the localized measured hardness change to flow stresses which have been evolved during strain-hardening and microstructural phase changes of the bearing material. Moreover, to evaluate the representative stress-strain curve of the altered microstructure, a 5um spherical indenter was employed in a cyclic loading manner. The use of the spherical indenter with the integration of Field and Swain numerical model enables to extract the representative flow curve of the material at highly localized areas which cannot be possible even with miniature uniaxial tension/compression test.
https://eprints.bournemouth.ac.uk/34808/
https://www.stle.org/images/PDF/STLE_ORG/TFC/2020/2020TFC_Preliminary_Program_10.14.pdf
Source: BURO EPrints