Crack growth and microstructural changes in AISI 52100: white etching cracks (WEC) and fine granular area (FGA)
نویسندگان
چکیده
منابع مشابه
Investigations of White Etching Crack (WEC) Formation under Rolling Contact Fatigue
A premature failure mode in steel rolling element bearings called white structure flaking (WSF) occurs in wind turbine gearbox bearings. WSF can occur in as little as 6-24 months of operation. WSF is associated with microstructural alterations called white etching area (WEA) and white etching cracks (WECs) that form in the ~1 mm zone beneath the contact surface. The tribological drivers for WSF...
متن کاملExperimental and Simulation Studies of Strength and Fracture Behaviors of Wind Turbine Bearing Steel Processed by High Pressure Torsion
White structure flaking (WSF) has been found to be one of the failure modes in bearing steels under rolling contacts through the formation of cracks associated with a microstructural change called white etching area (WEA). In the present research, the effects of the high-pressure torsion (HPT) process on the microstructure and mechanical properties of an AISI 52100 alloy are studied. An anneale...
متن کاملA Study of White Etching Areas in an Annealed 52100 Steel through High Pressure Torsion Processes
INTRODUCTION White Structure Flaking (WSF) is a type of surface damage responsible for some early failures in wind turbine gearbox bearings. WSF has been associated with microstructural changes registered close to the damaged surface that appear to be white after etching, hence the name White Etching Areas (WEAs). Local hydrogen liberation from lubricants [2] and adiabatic shear bands [3] have...
متن کاملPreparation and Mechanical Properties of Nano/Ultrafine Bainitic Structure in AISI 52100 Steel
The development of nano/ultrafine bainitic structure in AISI 52100 steel was the goal of this study. For this purpose,the AISI 52100 the specimens were austenitized at 1050 °C for 60 min followed by low-temperature austemperingtreatment at different temperatures and times. The austempered samples were characterized using field emissionscanning electron microscopy (FESEM), X-ra...
متن کاملLongitudinal changes in microstructural white matter metrics in Alzheimer's disease
BACKGROUND Alzheimer's disease (AD) is a progressive neurodegenerative disorder. Current avenues of AD research focus on pre-symptomatic biomarkers that will assist with early diagnosis of AD. The majority of magnetic resonance imaging (MRI) based biomarker research to date has focused on neuronal loss in grey matter and there is a paucity of research on white matter. METHODS Longitudinal DTI...
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ژورنال
عنوان ژورنال: MATEC Web of Conferences
سال: 2019
ISSN: 2261-236X
DOI: 10.1051/matecconf/201930018001