|About this Abstract
||Materials Science & Technology 2017
||Fifty Years of Metallography and Materials Characterization
||Three Dimensional (3D) Analysis of White Etching Regions in AISI M50 Bearing Steel
||Satya Ganti, Bryan Turner, Hitesh K Trivedi, Veeraraghavan Sundar, Mathew Kirsch, Don Anthony, Bryan McCoy
|On-Site Speaker (Planned)
White etching regions and dark etching regions forms in stressed regions of the bearings. A “butterfly” formation forms around oxide impurities and large carbides. These formations are dependent on operating conditions, material alloying elements and heat treatment. They are well studied in two dimension (2D). The objective of this study was to analyze WER formation in three dimensional (3D) that will allow better understanding of material transformation after stress cycling. Three rolling contact fatigue (RCF) tested AISI VIMVAR M50 samples(bench test, sub-scale test and commercial gas turbine engine) were analyzed using automated serial sectioning to map WER network and butterfly in 3D. Automated serial sectioning and 2D optical microstructural data for 3D reconstructions and analysis was done using a fully automated serial sectioning system - RoboMet.3DŽ. The 2D image data set allowed 3D visualization and analysis of the evolution and propagation of WER and butterfly in AISI M50 bearing steel.
||Planned: Publication outside of MS&T