evaluation of rolling contact fatigue by using an x

Evaluation of Two Iterative Techniques for Reducing

2019-8-14Evaluation of Two Iterative Techniques for Reducing Metal Artifacts in Computed Tomography using x-ray beams of nonzero width Reconstruction of the rolling contact fatigue cracks in rails using X-ray computed tomography NDT E International Vol 92

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OS11W0093 Ultrasonic spectroscopic nondestructive evaluation on pulsating and rolling contact fatigue damage Miura Setsuo Kobayashi Michiaki Tang Shihua Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2003 2(0) _OS11W0093-_OS11W0093 2003

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The crystallite size and dislocation density in RCF (rolling contact fatigue) affected layers have been identified using X-ray Fourier analyses on serviced rails The evaluation of the crystallite size and dislocation density is based on modified Williamson-Hall and Warren-Averbach models

Rolling Contact Fatigue Evaluation of Materials Using

The QIBR-SNR FB2 test rig was developed 40 years ago with the objective to assess the rolling contact fatigue (RCF) life of steels The aim was to get a relatively quick and cheap evaluation of the performance of steels and processes on simple rings under well controlled operating conditions compared to full scale tests on application rigs

Evaluation of Rolling Contact Fatigue Using X Ray

In this report a novel approach for evaluating the progressive degree of rolling contact fatigue (RCF) is introduced The rolling contact surface after two-cylinder testing was evaluated by a new X-ray analyzer which can rapidly obtain tri-axial residual stresses and the orientation of crystallite from an X-ray diffraction ring (Debye ring) on a two-dimensional detector

AN EVALUATION OF ROLLING CONTACT FATIGUE OF

2015-2-18is focused on the testing of rolling contact fatigue of the metallic materials using acoustic emission method The methodology of testing experimental test-rig and preliminary results are presented in this paper It can be concluded that acoustic emission technique can be applied for more accurate rolling contact fatigue evaluation of material

Subsurface initiated rolling contact fatigue of railway

2016-12-22Subsurface initiated rolling contact fatigue is assessed using the FIERCE model (Ekberg et al 2002) The fast algorithms in FIERCE allow for fatigue evaluation in each time increment This facilitates a sta-tistical evaluation of the fatigue impact which is

X

The crystallite size and dislocation density in RCF (rolling contact fatigue) affected layers have been identified using X-ray Fourier analyses on serviced rails The evaluation of the crystallite size and dislocation density is based on modified Williamson-Hall and Warren-Averbach models

Prediction of Residual Fatigue Life of Bearings Part 1

2002-10-17Parameters on the rolling contact surface have been estimated by an X-ray diffraction method As the results it was found that half value breadth (HVB) is the most relational parameter changing with the progress of rolling fatigue and the fatigue rate analysis technique by normalizing the changing quantity of HVB was established

Rolling contact fatigue detection using eddy current

Rolling contact fatigue (RCF) has become a pervasive and insidious problem on all types of railway system especially a safety challenge for high speed railway This paper introduces eddy current pulsed thermography (ECPT) a non-destructive testing and Evaluation (NDTE) technique for RCF detection and characterization in rail The theory and

5 Evaluation of the rolling contact fatigue layer

2020-2-17Evaluation of the rolling contact fatigue layer formed on rails using X-ray Fourier analysis It is possible to quantify inside a rail from it surface changes to its metallurgical microstructure due to rolling contact fatigue with indicators such as X-rayed crystallite size and dislocation density which increase in correlation with plastic strain

Contact fatigue failure evaluation of post

2007-10-6Prior to this investigation the rolling contact fatigue per-formance of post-treated functional graded thermal spray coatings was assessed using a modified four-ball rolling ma-chine [11] Results revealed that the relative performance of the coating was highly dependent on the changes within the coating microstructure

Rolling Contact Fatigue Life Evaluation Using Weibull

2020-7-15Rolling Contact Fatigue Life Evaluation Using Weibull Distribution Fig 1 Whler Curve Diagram Fig 2 Mechanism of Rolling Contact Fatigue The whole process of the contact fatigue is the result of simultaneous effect of the rolling contact and material status Considering enlarging and spreading of contact cracks cracks have to form or

Wear and surface fatigue in rolling bearings

2020-8-19Fig 5: Rolling contact fatigue model with the possibility to include wear on the raceway Experiments To validate the fatigue model an endurance test was conducted using a cylindrical thrust roller bearing 81107 TN (fig 6a) axially loaded with C/P = 6 5 and lubrication conditions given by a ≈ 0 5

Particle Damage in Hertzian Contacts and Life Ratings of

2018-6-5initiated fatigue The lubricant film developed at the dent and related local surface stresses are also significant to the crack initiation mechanism In this article a new methodology is pre-sented to link the micro-EHL film and related local stresses to the fatigue life of rolling

Evaluation of Railway Rails Suffered from Rolling

Evaluation of Railway Rails Suffered from Rolling Contact Fatigue Using X-Ray Generalized cosα Method p 2378 Portable System for the Measure of Efficiency in Arc Welding Processes p 2384 Proving the Preclusion of Data Manipulation Using Parallel Data Acquisition in Chromatography

Rolling Contact Fatigue Evaluation of Materials Using

The QIBR-SNR FB2 test rig was developed 40 years ago with the objective to assess the rolling contact fatigue (RCF) life of steels The aim was to get a relatively quick and cheap evaluation of the performance of steels and processes on simple rings under well controlled operating conditions compared to full scale tests on application rigs

Study on rolling contact fatigue of rails using potable

Rolling contact fatigue on the surface of rails due to railway wheel was sutudied using X-ray stress measurement method Tri-axial stress analysis was conducted with a new stress analysis theory so-called cosa method by detecting Debye-Scherrer ring with a two-dimensional X-ray detector and CrKa characteristic X-ray from irradiated area As a result it was found that tri-axial stress

Prediction of RCF clustered cracks dimensions using an

2020-4-14Rolling contact fatigue (RCF) cracks are the predominant reason for rail grinding maintenance and replacement on all types of railway system as they can potentially cause rail break if not removed To avoid excessive material removal accurate crack sizing is required

Rolling Contact Evaluation of Self

Rolling contact tests were conducted using a micromelt T-15 tool steel rod-silicon nitride (Si 3 N 4) balls at 482C and Si 3 N 4 rod-Si 3 N 4 balls at 650C using a ball-on-rod type rolling fatigue tester Transfer of lubricating material from retainer to the rod via the balls was observed

Rolling Contact Fatigue Evaluation of Advanced

The effect of the oil anti-wear additive tricresyl phosphate (TCP) on rolling contact fatigue (RCF) life of advanced bearing steels—AISI VIMVAR M50 CSS 42L Pyrowear 675 and Cronidur 30 was investigated with silicon nitride balls at 177 C and at a maximum Hertzian stress of 5 5 GPa TCP at 1% additive concentration was blended into a synthetic polyol ester turbine engine lubricant

Evaluation of Rolling Contact Fatigue by Using an X

In this report rolling contact fatigue (RCF) progression in two-cylinder type RCF testing is evaluated by using an X-ray diffraction ring analyzer which can rapidly obtain tri-axial stress and the orientation of crystallite The large compressive and three principal stresses on the RCF surface are observed under boundary lubrication It is considered that the crack occurrence and its

Investigation Into Microstructural Changes Due To

Despite some studies on this steel there is still a lack of information on microstructural evolution during rolling contact fatigue (RCF) Hence in order to get a better understanding of the microstructural evolution and as a consequence of the crack initiation in the framework of this study a comprehensive set of experimental techniques

Fatigue Design Evaluation of Railway Bogie with Full

The bogie frame of a railway is an important structural member for the support of vehicle loading In general more than 25 years#x2019 durability is necessary Much study has been carried out in experimental and theoretical domains on the prediction of the structural integrity of the bogie frame The objective of this paper is to estimate the structural integrity of the bogie frame of an

Prediction of Residual Fatigue Life of Bearings Part 1

2002-10-17Parameters on the rolling contact surface have been estimated by an X-ray diffraction method As the results it was found that half value breadth (HVB) is the most relational parameter changing with the progress of rolling fatigue and the fatigue rate analysis technique by normalizing the changing quantity of HVB was established

Rolling Contact Fatigue Evaluation of Materials Using

The QIBR-SNR FB2 test rig was developed 40 years ago with the objective to assess the rolling contact fatigue (RCF) life of steels The aim was to get a relatively quick and cheap evaluation of the performance of steels and processes on simple rings under well controlled operating conditions compared to full scale tests on application rigs