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Journal articles on the topic 'Fatigue of bearing alloys'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ali, M. S., P. A. S. Reed, S. Syngellakis, Andrew J. Moffat, and Carl Perrin. "Microstructural Factors Affecting Fatigue Initiation in Various Al Based Bearing Alloys." Materials Science Forum 519-521 (July 2006): 1071–76. http://dx.doi.org/10.4028/www.scientific.net/msf.519-521.1071.

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Microscale fatigue damage mechanisms in various Al-Sn-Si based bearing alloys used as linings of plain automotive bearings are reported. Extensive work on previously developed alloys has concluded that secondary phase particles such as Sn and Si are potential fatigue initiation sites with a complex combination of various particle geometry parameters. A newly developed alloy contains a number of complex widely scattered intermetallics with much finer and fewer Sn and Si particles. This alloy system appears to be more resistant to initiate microscale fatigue damage compared to the previous syste

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2

Busby, A. K., and J. W. Martin. "Fatigue crack propagation in Al–Sn bearing alloys." Materials Science and Technology 5, no. 7 (1989): 689–98. http://dx.doi.org/10.1179/mst.1989.5.7.689.

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3

Syngellakis, S., M. S. Ali, and P. A. S. Reed. "Microstructural modelling of fatigue initiation in aluminium-bearing alloys." International Journal of Computational Methods and Experimental Measurements 1, no. 3 (2013): 249–64. http://dx.doi.org/10.2495/cmem-v1-n3-249-264.

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4

Seyyedi, J. "Thermal Fatigue of Low-Temperature Solder Alloys in Insertion Mount Assembly." Journal of Electronic Packaging 115, no. 3 (1993): 305–11. http://dx.doi.org/10.1115/1.2909333.

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Thermal fatigue resistance was investigated for insertion mount solder joints, manufactured with 58Bi-42Sn (wt. %), 43Sn-43Pb-14Bi, 52In-48Sn and 40In-40Sn-20Pb low-temperature alloys. Accelerated thermal cycling was used in conjunction with metallographic analysis to determine the fatigue resistance and to elucidate the failure mode for each solder composition. Additionally, the behavior of each solder alloy was compared to that of 63Sn-37Pb solder, tested under identical conditions. A two-phase microstructure with lamellar morphology was observed in 58Bi-42Sn, whereas a globular morphology w

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5

Della Corte, Christopher. "Novel Super-Elastic Materials for Advanced Bearing Applications." Advances in Science and Technology 89 (October 2014): 1–9. http://dx.doi.org/10.4028/www.scientific.net/ast.89.1.

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Tribological surfaces of mechanical components encounter harsh conditions in terrestrial, marine and aerospace environments. Brinell denting, abrasive wear and fatigue often lead to life-limiting bearing and gear failures. Novel superelastic materials based upon Nickel-Titanium (NiTi) alloys are an emerging solution. NiTi alloys are intermetallic materials that possess characteristics of both metals and ceramics. NiTi alloys have intrinsically good aqueous corrosion resistance (they cannot rust), high hardness, relatively low elastic modulus, are chemically inert and readily lubricated. NiTi a

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6

Gawarkiewicz, Rafał, Jan Sikora, and Boguslaw Siwek. "Problems of Analytical Determination of Journal Bearing Bush Fatigue Strength Estimates." Key Engineering Materials 490 (September 2011): 247–56. http://dx.doi.org/10.4028/www.scientific.net/kem.490.247.

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Problems connected with determination of stress distribution in sliding layer of thin-walled bearing bushes, investigated in bearing fatigue test rigs, have been presented. Using an example of plain bearings tested in the fatigue machine SMOK (built at the Gdańsk University of Technology) problems with obtaining a convergence of iterative procedure for determining the fatigue strength estimators of bearing alloy surface layer are analyzed. Calculations consisting in successive iterations of pressure distribution in oil film and corresponding elastic deformation of the bearing bush and housing

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7

Mizobe, Koshiro, Edson Costa Santos, Takashi Honda, Hitonobu Koike, Katsuyuki Kida, and Takuya Shibukawa. "Effect of Repeated Quenching on the Rotating Bending Strength of SAE52100 Bearing Steel." Advanced Materials Research 457-458 (January 2012): 1025–31. http://dx.doi.org/10.4028/www.scientific.net/amr.457-458.1025.

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Martensitic high carbon high strength SAE 52100 bearing steel is one of the main alloys used for rolling contact applications where high wear resistance are required. Due to its high fatigue strength, SAE 52100 is recently being used not only for the production of bearings but also shafts. Refining of prior austenite grain through repeated quenching is a procedure that can be used to enhance the material’s strength. In this work, the microstructure of repeatedly quenched SAE 52100 steel and its fatigue strength under rotating bending were investigated. It was found that repeated furnace heatin

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8

Watanabe, Chihiro, and Ryoichi Monzen. "Effects of Microstructures on Fatigue Behavior of an Al-Mg-Sc Alloy at an Elevated Temperature." Materials Science Forum 706-709 (January 2012): 426–30. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.426.

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Polycrystalline Al-1wt%Mg-0.27wt%Sc alloys bearing Al3Sc particles with different average sizes of 4 and 11nm in diameter have been cyclically deformed at 423K under various constant stress amplitudes, and the relationship between fatigue characteristics and microstructure of the alloy has been investigated. The specimen bearing 11 nm particles exhibited a cyclic hardening to saturation, while in specimens with the small particles a cyclic softening was observed after initial hardening. In the specimen with large particles, dislocations were uniformly distributed under all applied stress ampli

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9

Nakane, Kazuaki, Koshiro Mizobe, Edson Costa Santos, and Kida Katsuyuki. "The Quantization of the Structure of Fisheyes via Homology Method." Applied Mechanics and Materials 307 (February 2013): 409–14. http://dx.doi.org/10.4028/www.scientific.net/amm.307.409.

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Martensitic high carbon high strength SAE 52100 bearing steel is one of the main alloys used for rolling contact applications where high wear resistance are required. Due to its high fatigue strength, SAE 52100 is recently being used not only for the production of bearings but also shafts. In this work, quenched SAE 52100 steel fatigue strength under rotating bending was investigated. Especially, we focus on “fisheye around inclusion” where the fatigue crack starts. Quantitative evaluation of its optical micrograph has not been enough carried out. In order to develop easy evaluation method for

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10

Averbach, B. L., Bingzhe Lou, P. K. Pearson, R. E. Fairchild, and E. N. Bamberger. "Fatigue crack propagation in carburized high alloy bearing steels." Metallurgical Transactions A 16, no. 7 (1985): 1253–65. http://dx.doi.org/10.1007/bf02670330.

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11

Wan, Biao, Jianguo Yang, and Qinghe Wang. "Evaluation of Tribological Properties of Bearing Materials for Marine Diesel Engines Utilising the Contact Voltage Method." Applied Sciences 11, no. 17 (2021): 7811. http://dx.doi.org/10.3390/app11177811.

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The contact voltage (CV) method, which can detect miniature failures, has been tested under laboratory conditions to monitor the condition of bearings. In this study, the bearing materials for marine diesel engines, aluminium and copper alloy, were tested on a bearing fatigue wear test bench in the boundary lubrication state, which was found through tests of the different parameters. The frictional torque, the oil film thickness and the bearing temperature were measured, as well as the CV signals. The possibility of using the CV technique to monitor the condition of the bearings was also asses

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12

MWANZA, M. "Microstructural characterisation of fatigue crack initiation in Al-based plain bearing alloys." International Journal of Fatigue 25, no. 9-11 (2003): 1135–45. http://dx.doi.org/10.1016/s0142-1123(03)00148-8.

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13

Huang, Qing-xue, Jian-mei Wang, Li-feng Ma, and Chun-jiang Zhao. "Fatigue Damage Mechanism of Oil Film Bearing Sleeve." Journal of Iron and Steel Research International 14, no. 1 (2007): 60–63. http://dx.doi.org/10.1016/s1006-706x(07)60013-2.

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14

Amherd Hidalgo, Alexandra, Thomas Ebel, Wolfgang Limberg, and Florian Pyczak. "Influence of Oxygen on the Fatigue Behaviour of Ti-6Al-7Nb Alloy." Key Engineering Materials 704 (August 2016): 44–52. http://dx.doi.org/10.4028/www.scientific.net/kem.704.44.

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One of the challenges in PM Ti alloys is to control the impurities level. Oxygen affects the microstructure and the mechanical properties of titanium alloys. Ti-6Al-7Nb is a promising alloy to use in PM due to its outstanding biocompatibility and mechanical properties required for load bearing medical implants. In this work, the influence of the impurities content on the ductility, fatigue resistance and microstructure of Ti-6Al-7Nb alloy processed by metal injection moulding was examined. Tensile and fatigue specimens were manufactured using Ti-6Al-7Nb gas atomized powder. Depending on the th

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15

Xue, Wen, Ping Wang, Zhibo Dong, and Hongyuan Fang. "Nominal stress based equal fatigue bearing capacity design of HSLA steel V-shaped butt-welded joints." MATEC Web of Conferences 221 (2018): 01009. http://dx.doi.org/10.1051/matecconf/201822101009.

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Based on nominal stress, this paper proposed a fatigue life estimation method of V-shaped butt welded joints. Then, the fatigue bearing capacity of the base metal under the same fatigue load was used as design goal of the V-shaped butt welded joints and an equal fatigue bearing capacity (EFBC) design method for V-shaped butt welds was thus formed. High strength low alloy steel Q690 was chosen as the experimental material to carry out the equal fatigue bearing capacity design.

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16

Medved, Ivan, Oleksandr Pirogov, Andrey Romin, Vitalii Slovinskyi, and Galyna Venzhego. "Low Cycle Fatigue of Structural Alloys." Materials Science Forum 1038 (July 13, 2021): 3–8. http://dx.doi.org/10.4028/www.scientific.net/msf.1038.3.

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Metallurgy, mechanical engineering, energy, agriculture, food industry, energy, electronics, rocket and space technology – this is a far from complete list of areas of the national economy in which liquid cryogenic products (cryoproducts). The production volumes of such products and the scale of their use are constantly increasing. This is due to the fact that cryogenic temperatures (below 120 K) provide unique opportunities for the implementation of such physical phenomena and processes that do not manifest themselves under normal conditions, but are used very effectively in science and techn

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17

Eastham, D. R. "Electroplated Overlays for Crankshaft Bearings." Journal of Engineering for Gas Turbines and Power 115, no. 4 (1993): 706–10. http://dx.doi.org/10.1115/1.2906763.

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Overlays of either lead-indium or lead-tin-copper are electroplated onto both lead-bronze and aluminum alloy crankshaft bearings to improve seizure resistance and conformability during the initial running-in period. In addition, both the corrosion resistance, particularly of lead-bronze, and the effective fatigue strength of the composite bearing are improved by this layer. The life of the overlay is largely dependent upon the diffusion rate of the low melting point species to the substrate. Thus, migration of either the indium or the tin will determine both the corrosion and wear rates of the

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18

Leupold, S., R. Schelenz, and G. Jacobs. "Method to determine the local load cycles of a blade bearing using flexible multi-body simulation." Forschung im Ingenieurwesen 85, no. 2 (2021): 211–18. http://dx.doi.org/10.1007/s10010-021-00457-y.

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AbstractConventional methods for designing rolling bearings against fatigue assume that a bearing ring is fully rotating and that the load is ideally distributed over the rolling elements. Blade bearings in wind turbines, are operated under oscillating motions and dynamic loads. The load distribution is strongly dependent on the stiffness of the bearing rings and the surrounding structural components. This has been shown in numerous studies using FEM simulations for static load cases. In this paper a method is presented that reduces the calculation effort of the deformation of the bearing ring

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19

Mizobe, Koshiro, Hitonobu Koike, and Katsuyuki Kida. "Influence of Thrice-Induction-Heating and Once-Quenching on Fatigue Strength of SAE52100 Steel." Advanced Materials Research 893 (February 2014): 415–18. http://dx.doi.org/10.4028/www.scientific.net/amr.893.415.

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Martensitic high-carbon high-strength SAE 52100 bearing steel is one of the main alloys used as the principal alloys for rolling contact applications. We developed a novel repeated quenching method by induction heating in order to enhance the materials strength. The steel bar passed through the heated coil several times and finally quenched by cooling water. The rotating bending fatigue tests was done in order to investigate the fatigue strength of the steel bars. The heat affected zone (HAZ) was not expanded by the heat treatment however it was found that the thrice-induction-heating and once

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20

Wang, Yuan Qing, Huan Xin Yuan, and Yong Jiu Shi. "Mechanical and Fatigue Performance Tests of Cast Aluminum Alloy ZL111 Adopted in Structure." Advanced Materials Research 168-170 (December 2010): 1961–69. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.1961.

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Characteristics of aluminum alloys such as light weight, high strength-to-weight ratio and favorable corrosion resistance have brought about a bright application prospect in building structures. Wrought alloys are applicable to common beams and columns, while casting alloys can be fabricated as connectors in point-supported glass curtain wall and joints in spatial latticed structures on account of easy implement of moulding. Because of high strength, outstanding castability and remarkable mechanical properties after heat treatment, ZL111 in aluminum-silicon alloys is regarded as a desirable op

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21

Ali, M. S., P. A. S. Reed, and S. Syngellakis. "Comparison of fatigue performance of HVOF spray coated and conventional roll bonded aluminium bearing alloys." Materials Science and Technology 25, no. 5 (2009): 575–81. http://dx.doi.org/10.1179/174328408x322213.

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22

Xu, Xiao Jing, Seock Sam Kim, Kang Min Chen, and Q. F. Luo. "Analysis of the Failure of Turbocharger Shaft Bearing in Diesel Engines." Key Engineering Materials 297-300 (November 2005): 1376–81. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.1376.

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A sudden failure of the bearing of the turbocharger shaft in a diesel engine, with the power of 11520KW and the total running time of 2,417h, is investigated in this paper. Based on an examination of the disassembled turbocharger and a residue analysis, it was found that the failure of the turbocharger originated from a fatigue fracture of an aluminum-alloy bearing retainer (cage) on its compressor side. The axial load was a chief cause of the fatigue fracture and the looseness defects in the aluminum alloy retainer deteriorated its fatigue strength which in turn accelerated the development of

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23

Bhaumik, Shubrajit, and Viorel Paleu. "Wear and Rolling Contact Fatigue Analysis of AISI 52100 Bearing Steel in Presence of Additivated Lubricants." Metals 11, no. 6 (2021): 907. http://dx.doi.org/10.3390/met11060907.

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Tribological properties of lithium potassium titanate (PT), molybdenum disulphide, and tungsten disulphide-dispersed mineral oil (MO) were investigated. The sample containing 2 wt.% WS2 exhibited the lowest coefficient of friction. However, the wear scar diameters of the additivated samples were very narrow. Extreme pressure properties of mineral oil were enhanced with the addition of additives. The rolling contact fatigue results exhibited better fatigue life of the balls in MoS2 and PT-dispersed MO. Surface characterization of the balls indicated more pitting on the balls of the MO and WS2-d

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24

Gu, Chao, Min Wang, Yanping Bao, Fuming Wang, and Junhe Lian. "Quantitative Analysis of Inclusion Engineering on the Fatigue Property Improvement of Bearing Steel." Metals 9, no. 4 (2019): 476. http://dx.doi.org/10.3390/met9040476.

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The fatigue property is significantly affected by the inner inclusions in steel. Due to the inhomogeneity of inclusion distribution in the micro-scale, it is not straightforward to quantify the effect of inclusions on fatigue behavior. Various investigations have been performed to correlate the inclusion characteristics, such as inclusion fraction, size, and composition, with fatigue life. However, these studies are generally based on vast types of steels and even for a similar steel grade, the alloy concept and microstructure information can still be of non-negligible difference. For a quanti

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25

Baudry, G., J. Saleil, G. Giroud, et al. "Fatigue property evaluation of bearing steels issued from rotary continuous casting." Revue de Métallurgie 89, no. 10 (1992): 877–86. http://dx.doi.org/10.1051/metal/199289100877.

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26

Grądzka-Dahlke, Małgorzata. "Comparison of Functional Properties of Thin Layers on Titanium and Cobalt Implant Alloys." Defect and Diffusion Forum 297-301 (April 2010): 1053–58. http://dx.doi.org/10.4028/www.scientific.net/ddf.297-301.1053.

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The development of arthroplastics places high demands on the materials used for load-bearing elements of orthopedic implants. The most common of implant materials are titanium and cobalt alloys due to their excellent mechanical properties and biocompatibility. Titanium alloys have desirable properties, such as relatively low modulus, good fatigue strength, formability, machinability, superior corrosion resistance and so are frequently used for long-term implants. However, poor wear resistance limits their application for tribological systems of artificial joints. Research on improvement of tit

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27

Watanabe, Chihiro, and Ryoichi Monzen. "Low-Cycle Fatigue Behavior of an Al-Mg-Si Alloy with and without a Small Addition of Sc." Materials Science Forum 654-656 (June 2010): 938–41. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.938.

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Low-cycle fatigue behavior of a wrought Al-0.8wt%Mg-0.7wt%Si alloy with and without 0.27wt%Sc has been investigated at room temperature under constant plastic-strain amplitudes. After peak-aging treatments, both the alloys had fine lath-shaped β' precipitates. In the Sc-containing alloy, spherical Al3Sc precipitates of about 11 nm in diameter were co-existed. The alloy with Sc exhibited cyclic hardening to saturation, while the alloy without Sc showed clear cyclic softening after initial hardening. Transmission electron microscopy observation revealed that slip band structures were developed i

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28

Koike, Hitonobu, Edson Costa Santos, Katsuyuki Kida, Takashi Honda, and Justyna Rozwadowska. "Effect of Repeated Induction Heating on Fatigue Crack Propagation in SAE 52100 Bearing Steel." Advanced Materials Research 217-218 (March 2011): 1266–71. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.1266.

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Martensitic high carbon high strength SAE 52100 bearing steel is one of the main alloys used for rolling contact applications when high wear and fatigue resistance are required. Refining the microstructure of steel improves its mechanical properties (e.g. toughness). In this work SAE 52100 specimens were exposed to repeated induction heating process and rotation bending tests were performed using single- and repeatedly heat-treated material in order to investigate the influence of this cyclic heat treatment on the mechanical properties of SAE 52100. In an attempt to determine the effect of the

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29

Beer, O. "Heat Treatment and Properties of High-Temperature Steels for Rolling Bearings." HTM Journal of Heat Treatment and Materials 76, no. 2 (2021): 155–71. http://dx.doi.org/10.1515/htm-2021-0001.

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Abstract It is demonstrated that high speed steels are suitable for manufacturing of heat resistant rolling element bearings especially for applications in aero engines. A detailed analysis of heat treating processes and metallurgical evaluation shows how the properties of these steels grades can be adjusted to meet the specific requirements for engine bearings. Based on results from rig testing it is shown how variations in heat treating parameters can influence the rolling contact fatigue performance. The role of carbides, a typical constituent of high speed steels, on bearing applications i

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30

Balutch, Thomas, Bertrand Huneau, Yann Marco, Pierre Charrier, and Clément Champy. "Fatigue behaviour of an industrial synthetic rubber." MATEC Web of Conferences 165 (2018): 22004. http://dx.doi.org/10.1051/matecconf/201816522004.

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For some automotive anti-vibration applications, for instance exhaust hangers, center bearing bushes or torsional vibration dampers, temperature constraints make the use of synthetic rubbers, such as EPDM, necessary because of their better heat aging resistance compared to natural rubber. The aim of this paper is to understand the features of the fatigue behaviour of an industrial EPDM compared to the wellknown natural rubber. To do so, fatigue tests are conducted on hourglass-shaped specimens, and fracture surfaces are analysed using optical microscopy and scanning electron microscopy (SEM).

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31

Xu, Hai-feng, Gui-lin Wu, Chang Wang, Jian Li, and Wen-quan Cao. "Microstructure, hardness and contact fatigue properties of X30N high nitrogen stainless bearing steel." Journal of Iron and Steel Research International 25, no. 9 (2018): 954–67. http://dx.doi.org/10.1007/s42243-018-0138-8.

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32

Zhu, Zhi Shou, Chun Xiao Cao та Ming Gao Yan. "Low Cycle Fatigue Behavior of a Near-α Ti Alloy Containing Rare Earth Nd". Materials Science Forum 475-479 (січень 2005): 599–602. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.599.

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Low cyclic behavior of a new type near-α titanium alloy containing rare earth Nd (Ti60) with and without dwell time introduced at maximum tensile strain has been investigated at ambient temperature and 600°C. The results show that, Ti60 alloy exhibits a cyclic softening behavior at almost all strain levels being investigated. The cyclic processes show good agreement with predictions based on the fatigue crack propagation model. At 600°C, the LCF life of Nd-bearing near-α titanium alloy is superior to that at room temperature within the investigated strain range, which indicates that Ti60 alloy

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33

Bolaers, F., O. Cousinard, P. Estocq, X. Chiementin, and J.-P. Dron. "Comparison of denoising methods for the early detection of fatigue bearing defects by vibratory analysis." Journal of Vibration and Control 17, no. 13 (2011): 1983–93. http://dx.doi.org/10.1177/1077546309348853.

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The aim of this article is to show the interest of three major denoising methods for the improvement of the sensitivity of scalar indicators (crest factor, kurtosis) within the application of conditional maintenance by vibratory analysis on ball bearings. The case of a bearing in good condition of use is considered. The distribution of amplitudes in the vibratory signal is of the Gaussian kind. When the bearing is damaged, the appearance of spalling comes to disturb this signal, modifying this distribution. This modification is due to the presence of periodical impulses produced each time a ro

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34

Zhou, Zi-long, Hai-quan Wang, Xin Cai, Hai-zhi Zang, Lu Chen, and Fu Liu. "Bearing characteristics and fatigue damage mechanism of multi-pillar system subjected to different cyclic loads." Journal of Central South University 27, no. 2 (2020): 542–53. http://dx.doi.org/10.1007/s11771-020-4315-0.

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35

Germain, Guenael, Franck Morel, Jean Lu Lebrun, Anne Morel, and Bertrand Huneau. "Effect of Laser Assistance Machining on Residual Stress and Fatigue Strength for a Bearing Steel (100Cr6) and a Titanium Alloy (Ti 6Al 4V)." Materials Science Forum 524-525 (September 2006): 569–74. http://dx.doi.org/10.4028/www.scientific.net/msf.524-525.569.

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The use of Laser Assisted Machining (LAM) can improve different aspects of the machinability of high strength materials. A study was undertaken to determine the optimum cutting parameters and to quantify their influence on fatigue strength according to the type of microstructure created. Two different materials were studied: a bearing steel (100Cr6 / AISI 52100) and an aeronautical titanium alloy (Ti6Al4V). In the bearing steel a significant increase of the fatigue resistance was observed due to the transformation of the surface layer into martensite. For the titanium alloy, a slight reduction

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Bento, Rodrigo Teixeira, André Ferrus Filho, and Marco Antonio Fumagalli. "Structural Design and Stress Analysis of a High-Speed Turbogenerator Assembly Supported by Hydrodynamic Bearings." International Journal of Manufacturing, Materials, and Mechanical Engineering 10, no. 1 (2020): 54–67. http://dx.doi.org/10.4018/ijmmme.2020010104.

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Turbine and bushing bearing are the most critical components of high-speed machines. This article describes the design of a high-speed turbine supported by hydrodynamic bearings. The mathematical dimensioning and the FEM analysis are presented to validate the mechanical strength of the turbine and the bushing bearing models. Fatigue life and factor of safety were also determined. The simulations showed that the maximum Von Mises stress values obtained are associated to the centrifugal force generated by the system rotational movement. The results variation was mainly due to the properties of t

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37

Eto, Takehiko, and Manabu Nakai. "New Process-Microstructure Method for Affordable 2024 Series Aerospace Aluminum Alloys." Materials Science Forum 539-543 (March 2007): 3643–48. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.3643.

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New affordable 2024 series aerospace aluminum alloy has been developed. Fracture toughness has been demonstrated increase in inverse proportion to the root of the distance between constituents, Cu2FeAl7, formed during ingot solidification. Higher fracture toughness material is obtained by means of combination of reduction of Fe content and wider spacing between the constituents. The fractured surface of those materials has been confirmed to show larger dimples due to the wider constituents. An outcome is the fracture toughness increases 20% through broadening the space from 75 to 140μm. Fatigu

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38

Rozwadowska, Justyna, Katsuyuki Kida, Edson Costa Santos, et al. "Rolling Contact Fatigue of Titanium Alloys Coated by Gas Nitriding Using a Q-Sw Laser." Applied Mechanics and Materials 83 (July 2011): 191–96. http://dx.doi.org/10.4028/www.scientific.net/amm.83.191.

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The influence of gas nitriding of commercial pure titanium and Ti-6Al-4V (Ti64) alloy by using a Q-sw laser on the wear loss during rolling contact fatigue is investigated. Despite very good biocompatibility, high strength to weight ratio and corrosion resistance, the tribological properties of titanium alloys are inferior to those of other metal alloys, such as steel. Fretting and wear related aspects become important issues when titanium alloys are used in rolling contact applications. Titanium bearings are employed in applications requiring high strength, light weight, and minimum maintenan

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Oh, Chung Seog, Philip Park, Yong Hak Huh, Soon Gyu Ko, Don Young Hwang, and Hyeon Mo An. "Fatigue Crack Growth Behavior of Corner Cracks under LBH Loading." Key Engineering Materials 297-300 (November 2005): 128–36. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.128.

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This investigation aims at doing some durability and damage tolerant (DaDT) tests with 2124-T851 aluminum specimens having corner cracks under a random history, correlating with the simulation results from AFGROW and then drawing some conclusions from those comparisons. Two hydraulic actuators and a homemade Wood’s alloy grip are employed to do the test. The surface crack lengths are measured by a traveling microscope and used as a reference for the later fractography. The crack penetration and the total lives are about 17 and 27 blocks, respectively. The crack length and depth are evaluated b

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40

Shankayi, M., H. Soleimanimehr, M. R. Rahmanabadi, and A. R. Shafighi. "Bearing Design Simulation in Direct Extrusion of AA2024 Using Finite Element." Advanced Materials Research 445 (January 2012): 263–68. http://dx.doi.org/10.4028/www.scientific.net/amr.445.263.

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Extrusion is a metal forming process which involves plastic deformations. Economic significance of extrusion is due to its material efficiency, labor costs reduction, elimination of intermediate treatments, better output quality, and high production rates. Bearing length is one of the important features in extrusion dies. The aim is to make all the material points in outgoing profile have the same flow velocity, so in an effective design the flow velocity of thick features is controlled to be same as for thinner features. AA2024 alloy is widely used in military and aerospace industries. It has

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Negrea, Alexis Daniel, Ileana Nicoleta Popescu, Mihǎiţǎ Nicolae Ardeleanu, Claudiu Nicolicescu, and Carmen Otilia Rusǎnescu. "Researches and Finite Element Simulations of Radial Loading Deformations Applied to Steel Ball Bearings." Advanced Engineering Forum 34 (October 2019): 109–14. http://dx.doi.org/10.4028/www.scientific.net/aef.34.109.

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The appearance of quick wear of rolling paths and rolling elements (balls) through contact fatigue phenomena and through surface defects lead to a decrease in the life of ball bearings in service. One of the causes is the interruption of the lubricating film between surfaces with relative motion under load conditions and high speeds, which leads to plastic micro-deformations and micro-welding between contact surfaces. Diagnosing defects by visual observation involves disassemble of the bearing and is an ineffective method of investigation in serial production. In this context, the necessity of

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Rozwadowska, Justyna, Katsuyuki Kida, Edson Costa Santos, et al. "Wear Resistance Improvement of Titanium Bearings by Laser Gas Nitriding." Advanced Materials Research 217-218 (March 2011): 988–93. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.988.

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The influence of gas nitriding of commercial pure titanium and Ti-6Al-4V (Ti64) alloy by using a Q-sw laser on the wear loss during rolling contact fatigue is investigated. Despite very good biocompatibility, high strength to weight ratio and corrosion resistance, the tribological properties of titanium alloys are inferior to those of other metal alloys, such as steel. Fretting and wear related aspects become important issues when titanium alloys are used in rolling contact applications. Titanium bearings are employed in applications requiring high strength, light weight, and minimum maintenan

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Jiang, Shu Nong, and Shi Yuan Xu. "Influence of Surface Conditions on the Fatigue Behavior of A357 Aluminum Alloy." Materials Science Forum 850 (March 2016): 113–19. http://dx.doi.org/10.4028/www.scientific.net/msf.850.113.

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The influence of surface conditions on the fatigue behavior A357 aluminum alloy was studied in this paper. Four-point bending fatigue tests method were performed to obtain the fatigue strength of A357 cast aluminum alloy specimens with different surface conditions. A joint bearing rig was designed to minimize the experimental error caused by the misalignment associated with a four-point bend test. The results showed that the fatigue strength of specimens with as-cast surfaces was higher those with machined surface roughness of Ra=1.6μm and 3.2μm, while lower than that with Ra=0.4μm. Optical mi

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Fu, Hanwei, and Pedro E. J. Rivera-Díaz-del-Castillo. "A unified theory for microstructural alterations in bearing steels under rolling contact fatigue." Acta Materialia 155 (August 2018): 43–55. http://dx.doi.org/10.1016/j.actamat.2018.05.056.

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Tsuji, Kenya, Koshiro Mizobe, and Katsuyuki Kida. "Development of Fracture Surface Etching (FSE) Method around Non-Metallic Inclusion of SUJ2 Steel." Materials Science Forum 971 (September 2019): 65–69. http://dx.doi.org/10.4028/www.scientific.net/msf.971.65.

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High-carbon high-strength JIS-SUJ2 bearing steel is one of the alloys used as rolling contact applications which need high wear resistance. This high hardness material is broken from non-metallic inclusions under fatigue stress. In this work, we developed a new observation method “fracture surface etching (FSE)” in order to observe the material microstructure on the fracture surface. We succeeded to draw clear grain boundaries on the fracture surfaces and closely observed the material microstructure around the crack origins by the FSE method. We concluded that the crack initiation area boundar

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Venugopal, Arvinthan, Roslina Mohammad, Md Fuad Shah Koslan, Ashaari Shafie, Alizarin bin Ali, and Owi Eugene. "Crack Growth Prediction on Critical Component for Structure Life Extension of Royal Malaysian Air Force (RMAF) Sukhoi Su-30MKM." Metals 11, no. 9 (2021): 1453. http://dx.doi.org/10.3390/met11091453.

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The critical aircraft structure, being the load-bearing members, is a vital component for any aircraft. The effect of fatigue loading, operating conditions, and environmental degradation has caused the structural integrity of the airframe to be assessed for its airworthiness requirement. Using the fatigue design concept of Safe Life, the RMAF adopts the Aircraft Structure Integrity Program (ASIP) to monitor the structural integrity of its critical components. RMAF has produced the task card using the engineering analysis concept on the aircraft’s critical structure. Various Computer-Aided Engi

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An, Xueliang, Zhiyue Shi, Haifeng Xu, et al. "Quantitative Examination of the Inclusion and the Rotated Bending Fatigue Behavior of SAE52100." Metals 11, no. 10 (2021): 1502. http://dx.doi.org/10.3390/met11101502.

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This study investigated the effect of maximum inclusion on the life of SAE52100 bearing steel processed by two different melting routes, vacuum induction melting plus electroslag remelting (VIM + ESR), and basic oxygen furnace plus ladle furnace plus vacuum degassing process (BOF + LF + RH) by the metallographic method, Aspex explorer, and rotated bending fatigue test. The rotated bending method was applied to examine the maximum inclusion size in a satisfactory manner, whereas both the metallographic method and Aspex explorer underestimated the result. Regardless of the characterization metho

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Xiao, Wei, Yan-ping Bao, Chao Gu, et al. "Ultrahigh cycle fatigue fracture mechanism of high-quality bearing steel obtained through different deoxidation methods." International Journal of Minerals, Metallurgy and Materials 28, no. 5 (2021): 804–15. http://dx.doi.org/10.1007/s12613-021-2253-y.

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Gu, Chao, Wen-qi Liu, Jun-he Lian, and Yan-ping Bao. "In-depth analysis of the fatigue mechanism induced by inclusions for high-strength bearing steels." International Journal of Minerals, Metallurgy and Materials 28, no. 5 (2021): 826–34. http://dx.doi.org/10.1007/s12613-020-2223-9.

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Zhang, Jiao, Xi Li, and Hao Xie. "Fatigue Finite Element Analysis of Certain Type of EMU Gearbox Box." Applied Mechanics and Materials 789-790 (September 2015): 236–40. http://dx.doi.org/10.4028/www.scientific.net/amm.789-790.236.

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EMU gearbox is a key component of high-speed train, the reliability of the gearbox will directly affect the operational safety of EMU. The box of EMU gearbox is with light alloy materials, bearing structure, so the box is subjected to greater loads and shock and vibration. Designers most take into account the static strength and stiffness of the box, ignore the fatigue failure. Fatigue failure is the leading cause of mechanical structural failure, while the peak load cycle fatigue failure is often far less than estimated in accordance with the static fracture analysis "safe" load, so the EMU g

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