Download or read book Rolling Contact Fatigue Study of Soft Coated Bearing Steel written by Robert Louis Thom and published by . This book was released on 1993 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rolling Contact Fatigue Testing of Bearings Steels written by J. J. C. Hoo and published by ASTM International. This book was released on 1982 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rolling contact Fatigue and Wear Resistance of Hard Coatings on Bearing steel Substrates written by and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bearing Steel Technologies written by John M. Beswick and published by . This book was released on 2012 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Some Factors Affecting Rolling contact Fatigue Life written by Thomas L. Carter and published by . This book was released on 1960 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Factors included bearing lubricants, non-metallic inclusions and material alloy composition.

Download or read book Effect of Steel Manufacturing Processes on the Quality of Bearing Steels written by J. J. C. Hoo and published by ASTM International. This book was released on 1988 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Study of the Evaluation of the Fracture Initiation and Propagation on the Rolling Contact Fatigue in Bearing Steels written by Akihiro Owaki and published by . This book was released on 2017 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bearings used in various industrial machines need to have good rolling contact fatigue resistance. It is known that the fatigue resistance in clean lubricating oil is decreased when there is a nonmetallic inclusion in the bearing steel. For this reason, various studies to reduce the size and quantity of inclusions have been carried out. On the other hand, to obtain a new approach to suppress the influence of the nonmetallic inclusions, it is important to understand the influence of each nonmetallic inclusion type on the rolling contact fatigue resistance. Therefore, we have worked on evaluations of the fracture initiation and propagation on the rolling contact fatigue in bearing steels. In the previous symposium, we reported that we had created an oxide type inclusion controlled steel (OTICS) using the melting furnace in our laboratory. This steel has an excellent rolling contact fatigue life. In this paper, we will report fracture initiation and propagation on the rolling contact fatigue in OTICS and conventional steel evaluated using an ultrasonic test and an acoustic emission test. We have investigated the defects under the rolling contact surface by the ultrasonic test, with loadings applied at certain times in the thrust-type rolling contact fatigue test. During the test, we also measured the acoustic emissions generated when a fracture occurred. From the ultrasonic test, we succeeded in detecting nonmetallic inclusions with the fractures. Furthermore, the time before defects were detected in the OTICS was longer compared to conventional steel. The same tendency was observed in the acoustic emission test. Longer load times were required before acoustic emissions were detected in OTICS. According to these results, it can be considered that OTICS has a greater rolling contact fatigue life than conventional steel due to the inhibition of the fracture initiation from the nonmetallic inclusion.

Download or read book Rolling Contact Fatigue in a Vacuum written by Michael Danyluk and published by Springer. This book was released on 2014-11-03 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with wear and performance testing of thin solid film lubrication and hard coatings in an ultra-high vacuum (UHV), a process which enables rapid accumulation of stress cycles compared with testing in oil at atmospheric pressure. The authors’ lucid and authoritative narrative broadens readers' understanding of the benefits of UHV testing: a cleaner, shorter test is achieved in high vacuum, disturbance rejection by the deposition controller may be optimized for maximum fatigue life of the coating using rolling contact fatigue testing (RCF) in a high vacuum, and RCF testing in UHV conditions enables a faster study of deposition control parameters. In short, Rolling Contact Fatigue in a Vacuum is an indispensable resource for researchers and engineers concerned with thin film deposition, solar flat panel manufacturing, physical vapor deposition, MEMS manufacturing (for lubrication of MEMS), tribology in a range of industries, and automotive and marine wear coatings for engines and transmissions.

Download or read book Rolling Contract Fatigue Testing of Bearing Steels written by Rolling contact fatigue testing of bearing steels and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Austempering Effects on the Rolling Contact Fatigue Characteristics of Bearing Steels written by Seon Ho Lee and published by . This book was released on 2014 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional studies of bearing steels and heat treatments have dealt with quenching and tempering (Q/T) in 52100 steel. Despite all the research, however, the latest trend in automotive parts is having a long life span, high quality, and reliability. Car components must be developed to meet the above car manufacturer's requirements. The increase in service life of wheel bearings, by improving the rolling contact fatigue (RCF) life of bearing steels, was investigated. Bearing steels for wheel units are commonly treated by through or case hardening to strengthen the steel. This study suggests a new trial to increase the strength of bearing steels by austempering in phases after general heat treatments such as Q/T or carburizing. This special heat treatment was also designed to produce fine austenite grains to increase the fatigue strength. The experiment is carried on with conventional 5120 and 52100 bearing steels, with the former applied to carburizing, while the latter is applied to Q/T. Austempering was then additionally conducted in each steel to investigate the effect of fine austenite generation in each bearing steel. Aside from the aforementioned trial, this study also focuses on the microstructural behavior taking place after austempering. In this study, a newly designed heat treatment concept is introduced and the probabilistic property of fatigue life was investigated using the RCF life test and the L10 approach. The effect of microstructural behavior on these properties is also analyzed using scanning electron microscopy (SEM)/energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and X-ray diffraction (XRD). In addition, the dilatometer is used to determine the bainite transformation temperature point in both cases.

Download or read book Bearing Steel Technologies written by John M. Beswick and published by . This book was released on 2012 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Propagation of Surface Initiated Rolling Contact Fatigue Cracks in Bearing Steel written by Pawel Rycerz and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rolling Contact Fatigue of Advanced Bearing Steels written by Lynne Elise Ecker and published by . This book was released on 1992 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Improvement of the Rolling Contact Fatigue Resistance in Bearing Steels by Adjusting the Composition of Oxide Inclusions written by Tomoko Sugimura and published by . This book was released on 2014 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improvements in the rolling contact fatigue resistance of bearing steels need to be made, and various researches to achieve this have been implemented. It is particularly important that, among the non-metallic inclusions, the quantity of large-size oxide inclusions be reduced. Therefore, studies looking at minimizing oxide inclusions have been carried out. More recently, however, a new approach to improving the rolling contact fatigue resistance, different from previous methods, has been undertaken. It has been reported that the condition of the contact at the interfaces between the matrix and non-metallic inclusions is important because it affects the stress state around the inclusions, and that this condition needs to be considered to improve the fatigue resistance of bearing steel. In this paper, to develop bearing steel with a rolling fatigue life better than is currently the case, the relationship between the rolling contact fatigue resistance and the composition of oxide inclusions is investigated. By controlling the composition of the oxide inclusions, fatigue failure was avoided in a thrust-type rolling contact fatigue test, and the fatigue life (L10) achieved was greater than 200 million revolutions. The reason for this improvement is considered to be the absence of voids at the interface between the matrix and the non-metallic inclusions, which would otherwise have a negative effect on the fatigue life.

Download or read book Metal Physics and Rolling Contact Fatigue Testing written by R. H. Vegter and published by . This book was released on 2012 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A description of a novel rolling contact fatigue test for evaluation of bearing steel characteristics is presented. Unlike traditional approaches where bearings are tested until failure, the proposed testing method is based on monitoring the material response during testing. The measurement principles are based on changes of the surface geometry, such as grooving, because of accumulation of subsurface micro-plastic damage and on observations of related changes in the steel micro-structure. The test method is complemented by introducing a detailed material model that is used to model the groove development. The model is used to analyse the groove data and yields dedicated material property parameters, which can be used directly to model general material behaviour under rolling contact fatigue conditions. An example is given to illustrate the method and its use in assessing bearing steel performance.

Download or read book Effect of Nonmetallic Inclusions on Rolling Contact Fatigue Life in Bearing Steels written by M. Kinoshi and published by . This book was released on 1975 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rolling-contact fatigue life tests were studied to evaluate the effect of nonmetallic inclusions in bearing steels similar to AISI 52100.

Download or read book A Microstructure Sensitive Study of Rolling Contact Fatigue in Bearing Steels written by Anup Surendra Pandkar and published by . This book was released on 2014 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Which promotes micro-plastic strain accumulation via ratcheting mechanism. Localized ratcheting is primarily responsible for cyclic hardening within the RCF affected region. Such evolution of subsurface hardness can be used to quantify RCF induced damage. To investigate this further, cyclic hardening response of the RCF affected region is simulated. The results show good agreement with the experimental observations. The cyclic stress-strain fields obtained from these simulations and the knowledge of hardness evolution can prove useful for future improvements to life models. The material parameters required for FE simulations are not available for many bearing steels. A novel method is presented to estimate these parameters for M50-NiL using the experimental results. Based on logical assumptions, this method provides meaningful estimates of material parameters. Modeling techniques and conclusions drawn from this research are helpful for improvements in life models.