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Dissertations / Theses on the topic 'Fatigue of bearing alloys'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Busby, A. K. "Structure-property relations in some bearing alloys." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376887.

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2

Harrison, M. "Fracture studies in aluminium alloys : An investigation of the effect of manganese-bearing and zirconium-bearing dispersoids on the fatigue properties of peak aged Al-Zn-Mg alloys." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376914.

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3

Szost, Blanka Angelika. "Hydrogen trapping in bearing steels : mechanisms and alloy design." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/244934.

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Hydrogen embrittlement is a problem that offers challenges both to technology and to the theory of metallurgy. In the presence of a hydrogen rich environment, applications such as rolling bearings display a significant decrease in alloy strength and accelerated failure due to rolling contact fatigue. In spite of these problems being well recognised, there is little understanding as to which mechanisms are present in hydrogen induced bearing failure. The objective of this thesis are twofold. First, a novel alloy combining the excellent hardness of bearing steels, and resistance to hydrogen embr

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4

Josi, Georg. "Fatigue of bearing-type shear splices." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40066.pdf.

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5

Dudgeon, Helen D. "Fatigue of aluminium-lithium alloys." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276536.

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6

Hunt, Anthony W. "Fatigue of commercial aluminium alloys." Thesis, Aston University, 1986. http://publications.aston.ac.uk/11901/.

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Fatigue crack propagation has been observed for a number of commercial aluminium alloys. Comparable data was obtained for a variety of crack and specimen geometries over a range of crack lengths for a given alloy. Where crack propagation only was of interest the initiation event has been excluded by pre-cracking the specimen using a fin of material adjacent to the crack face. By this method a controlled defect size is introduced in to the specimen. By modification of the D.C. potential drop method it has been shown possible to measure the growth of cracking from 0.12mm by this method. Crack gr

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7

Yang, Xiaofan. "Corrosion and passivation of molybdenum-bearing alloys." Thesis, University of Surrey, 1995. http://epubs.surrey.ac.uk/843256/.

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Molybdenum-bearing alloys are widely used in industry because of their excellent corrosion resistance. However, the role of molybdenum in passivation is a subject which has been a matter for discussion and controversy for many years. In the previous work carried out in this laboratory, Professor Castle and Dr Qiu suggested that molybdenum oxide might provide the nuclei for formation of the passive film. This hypothesis is the basis of the present work. In order to find out the evidence for the existence of the molybdenum oxide nuclei, furthermore, to establish a model of passivation for the mo

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8

Mohin, Ma. "Fatigue crack growth assessment and fatigue resistance enhancement of aluminium alloys." Thesis, University of Hertfordshire, 2018. http://hdl.handle.net/2299/20824.

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Fatigue damage of aluminium alloys is one of the key concerns in transport industries, particularly in the aerospace industry. The purpose of the project is to develop new knowledge and techniques against fatigue failure for these industries through a systematic investigation of fatigue resistance and crack growth behaviours of aluminium alloys. Fatigue and fracture mechanics have been investigated analytically, numerically and experimentally in this project. Overload transient effect on fatigue crack growth has been examined by considering various parameters including crack closure, overload

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9

Ali, Muhammad Sarfraz. "Microstructural modelling of fatigue in layered bearing architectures." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/64768/.

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Small automotive plain engine bearings are used to provide the relative motion between the engine block and the crankshaft via the connecting rod. Under rapidly changing engine loads, these bearings may suffer fatigue damage during service. In modern multilayered bearing designs, fatigue resistance is a complex function of engine loading coupled with the layer architecture and a multiphase lining alloy. This research has mostly focussed upon micro-scale fatigue damage initiation on thin (0.2-0.3mm thickness) lining surface and its subsequent growth leading towards gross failure. The systems ex

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10

Dandre, C. A. "Computer modelling of fatigue in titanium alloys." Thesis, Swansea University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636342.

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A computer package has been developed that models the inter-granular stress distributions that are considered to be responsible for the fatigue crack initiation and short crack growth stages in near-α titanium alloys. The computer package incorporates the finite element method, and by modelling stress distributions at the microstructural level, this research is placed at the forefront of the field. A computer program generates at hypothetical uniform grain structure consisting of hexagonal grains. However, in order to model the anisotropic nature that is inherent in titanium alloys, a texture

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11

Guengoeor, Salih. "Fatigue studies in Al-Mg-Si alloys." Thesis, Open University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276359.

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12

Geary, W. "Fatigue crack growth in iron silicon alloys." Thesis, Sheffield Hallam University, 1985. http://shura.shu.ac.uk/20609/.

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A technique for accurately monitoring fatigue crack growth at near threshold growth rates has been established. The characteristics of near threshold fatigue crack growth of a number of iron-silicon alloys has been quantitatively and qualitatively investigated. Relationships have been established relating the stress intensity factor, AK, and the fatigue crack growth rate da/dN. At fatigue crack growth rates approaching threshold the material has shown some microstructural sensitivity and this has been related to the stress intensity factor and the yield stress. A relationship has been shown to

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13

Zhang, Yahui. "Low cycle fatigue of shape memory alloys." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLY004/document.

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Dans cette thèse, nous proposons une analyse globale multi-échelles de la fatigue à faible nombre de cycles des matériaux à mémoire de forme (MMF). Dans un premier temps, une large campagne d’essais a été menée pour différents chargements thermomécaniques comprenant des tests de fatigue sous contrainte et déformation imposée et pour différentes fréquences de chargement. A partir des résultats des essais, un critère de fatigue, basé sur l’énergie de déformation, a été développé ; on montre que l’énergie de déformation est un paramètre pertinent pour prédire la fatigue des MMF en tenant compte d

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14

Turner, Michael. "Brush plating of bearing alloys on aluminium alloy shells." Thesis, Aston University, 1986. http://publications.aston.ac.uk/11919/.

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The turbocharging of diesel engines has led to increase in temperature, load and corrosive attack of plain bearings. To meet these requirements, overlay plated aluminium alloys are now preferred. Currently, lead-tin alloys are deposited using a zincate layer and nickel strike, as intermediate stages in the process. The nickel has undesirable seizure characteristics and the zincate can given rise to corrosion problems. Consequently, brush plating allows the possible elimination of these stages and a decrease in process together with greater automation. The effect of mode application, on the for

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15

Fu, Hanwei. "Microstructural alterations in bearing steels under rolling contact fatigue." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/270311.

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The formation of microstructural alterations in bearing steels under rolling contact fatigue (RCF) is systematically studied. A literature review summarizes current understanding in this field, leading to the key to the formation of these microstructural features being carbon redistribution as a consequence of cyclic rolling contact. In this context, a novel theory is postulated to describe the migration of carbon caused by gliding dislocations. The theory combines the Cottrell atmosphere theory with the Orowan equation and is capable of quantifying the dislocation-assisted carbon flux. Based

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16

Jung, Hie-young. "Characterization of fatigue crack propagation in Al-Li 2090 alloys." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/20692.

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17

Fair, G. H. "The effect of shot peening on fatigue and fretting-fatigue of aluminium alloys." Thesis, University of Nottingham, 1988. http://eprints.nottingham.ac.uk/12723/.

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Plain-fatigue and fretting-fatigue tests have been carried out on the two peak-aged, high-strength aluminium alloys, 7010 and 8090, in the unpeened and shot peened conditions. Shot peening produced a highly deformed surface containing many deep dimples and folds from which fatigue cracks rapidly initiated. Although initiation was early, propagation through the peened surface layers was retarded by the residual compressive stresses introduced by the peening treatment; this retardation being greatest at a depth corresponding to that of the peak residual compressive stress. Shot peening improved

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18

Fielding, S. E. "Fatigue and the Bauschinger effect in ferritic alloys." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304216.

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19

Yang, Jing. "Fatigue crack propagation threshold in lamellar TiAl alloys." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5620/.

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In the present study, the effect of lamellar spacing, volume fraction of equiaxed gamma grains and lamellar orientation on fatigue crack propagation threshold have been assessed for three as-cast γ-TiAl alloys, Ti45Al2Mn2Nb1B (4522XD), Ti45Al2Mn2Nb (4522) and Ti46Al8Nb (at %). The influence of alloying elements, Nb and Ta on fatigue threshold was also studied with five forged alloys, Ti45Al2Mn2Nb1B, Ti45Al2Nb2Ta1B, Ti45Al2Mn2Ta1B, Ti45Al2Mn4Ta1B and Ti45Al2Mn4Nb1B. The fatigue crack propagation threshold tests were carried out at 650°C in air at a stress ratio R=0.1 and frequency of 10HZ. In a

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20

Schooling, Jennifer Mary. "The modelling of fatigue in Ni-base alloys." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627446.

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21

Harty, Brian Dudley. "Corrosion fatigue of engineering alloys in aqueous environments." Doctoral thesis, University of Cape Town, 1990. http://hdl.handle.net/11427/18215.

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A comparative study of the fatigue crack growth rate (FCGR) behaviour of five alloys in air and in aqueous environments has been performed. The alloys tested include: mild steel as a reference material, a corrosion resistant dual phase steel, 3CR12, a proprietary martensitic stainless steel, AISI 431, a newly developed 8% Cr martensitic steel, Alloy 825, and a newly developed corrosion-abrasion resistant metastable austenitic alloy, 1210. Tests were conducted in laboratory air, distilled water at rest potential, 500 ppm chloride solution at rest potential, 1000 ppm chloride solution at rest po

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22

Child, Daniel. "Corrosion-fatigue interactions of high-temperature nickel alloys." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/9732.

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Corrosion and fatigue aspects of high temperature turbine components made from Alloy 720Li and RR1000 have been studied with a view to understanding the potential failure mechanisms occurring in these materials. Understanding of such failure mechanisms is important in order to make safety improvements and significant cost savings by reducing engine downtime. Some exservice discs currently exhibit pit-like features at a specific location on the firtree lobes, which potentially may lead to more serious alloy fissuring. Shot peening is currently employed to improve fatigue resistance at the surfa

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23

Shabestari, Saeed G. "Formation of iron-bearing intermetallics in aluminum-silicon casting alloys." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28920.

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The formation of iron-bearing intermetallics in the 413 type of aluminum alloys was investigated comprehensively. Both synthetic and commercial 413 alloys were studied with iron concentrations in the range of 0.4-1.2 wt. % and manganese up to 0.5 wt.%. The effects of cooling rate during solidification and of melt chemistry on the morphology of iron intermetallic phases were determined. Image analysis was used to quantify the intermetallic size, volume fraction, and number, as a function of both melt chemistry and cooling rate. The total volume fraction of intermetallic compounds in these alloy

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24

Highsmith, Shelby Jr. "Probabilistic fatigue crack life prediction in a directionally-solidified nickel superalloy." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/5410.

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25

Araujo, Jose Alexander. "On the initiation and arrest fretting fatigue cracks." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342243.

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26

Tsutsumi, Mitsuyoshi. "FATIGUE AND CREEP FATIGUE BEHAVIOR OF HEAT RESISTANT ALLOYS WITH ANISOTROPIC AND COMPOSITE MICROSTRUCTURES." Kyoto University, 1998. http://hdl.handle.net/2433/182333.

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27

Highsmith, Shelby. "Probabilistic fatigue crack life prediction in a directionally-solidified nickel superalloy." Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180222/unrestricted/highsmith%5Fshelby%5F200312%5Fms.pdf.

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28

Webb, Graham. "Cyclic deformation, damage, and effects of environment in the Ni₃Al ordered alloy at elevated temperature." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/19981.

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29

Russ, Stephan M. "Effect of underloads on fatigue crack growth of Ti-17." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180348/unrestricted/russ%5fstephan%5fm%5f200312%5fphd.pdf.

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30

Subramaniam, Ameendraraj. "Fatigue behavior of copper zinc aluminum shape memory alloys." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0013/MQ32256.pdf.

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31

Kan, Nathan Yu-Kwong. "Fatigue failure from internal defects in nickel base alloys." Thesis, University of Portsmouth, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308845.

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32

Zhang, Y. H. "Small fatigue crack growth in high strength aluminium alloys." Thesis, Open University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314821.

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33

Cree, Alistair Murray. "Fatigue in boric acid-sulphuric acid anodised aluminium alloys." Thesis, Open University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247058.

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34

Lados, Diana Aida. "Fatigue crack growth mechanisms in Al-Si-Mg alloys." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0204104-125758.

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Thesis (Ph. D.)--Worcester Polytechnic Institute.<br>Keywords: Microstructure; Elastic-Plastic Fracture Mechanics; Crack closure; A356; J-integral; Conventionally cast and SSM Al-Si-Mg alloys; Residual stress; Heat treatment; Fatigue crack growth mechanisms; Threshold stress intensity factor; Plastic zone; Paris law; Fracture toughness; Roughness. Includes bibliographical references.

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35

Jiang, Jiayun. "Fatigue and fracture of the friction welded titanium alloys." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/7006/.

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The autogenous friction welded- titanium alloys, Ti-6Al-4V and Ti-6Al-2Sn-4Zr-6Mo, were studied during this Ph.D. degree. An investigation was conducted on the microstructure evolution, fracture toughness and fatigue crack propagation behaviour of autogenous inertia welded Ti-6Al-2Sn-4Zr-6Mo. The microstructure and fatigue threshold behaviour of linear friction welded Ti-6Al-4V were also assessed in both the as-welded and the post weld heat treated conditions, and the fracture toughness was assessed at room temperature in post weld heat treated condition only. The fatigue threshold behaviou

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36

Moffat, Andrew James. "Micromechanistic analysis of fatigue in aluminium silicon casting alloys." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/52400/.

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Due to increasingly stringent environmental legislation, there is a requirement for lower emissions and greater overall efficiency of light vehicle diesel (LVD) engines. This continues to be achieved through the optimisation of design and careful selection of the materials used in key LVD engine components, for example pistons, so that they are lighter and can operate at higher temperatures. Pistons are non-serviceable parts and so must be able to withstand the fatigue and high temperature environment of the car engine. It is therefore important to understand the mechanisms of fatigue in these

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37

Zhao, Tianwen. "Fatigue of aluminum alloy 7075-T651 /." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3342620.

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Thesis (Ph. D.)--University of Nevada, Reno, 2008.<br>"December, 2008." Includes bibliographical references (leaves 76-83). Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2009]. 1 microfilm reel ; 35 mm. Online version available on the World Wide Web.

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38

Balanza, Erquicia R. A. "Wear of high aluminium zinc-based alloys in plain bearing applications." Thesis, Aston University, 1993. http://publications.aston.ac.uk/15273/.

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Two zinc-based alloys of high aluminium content, Super Cosmal alloy containing 60% Al, 6% Si, 1% Cu, 0.3% Mn and HAZCA alloy containing 60% Al, 8% Si, 2% Cu, 0.06% Mg were produced by sand casting. Foundary characteristics in particular, fluidity, mode of solidification and feeding ability were examined. Metallographic analysis of structures was carried out using optical and scanning electron microscopy and their mechanical properties were determined using standard techniques. Dry wear characteristics were determined using a pin-on-disc test, and boundary-lubricated wear was studied using full

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39

Rycerz, Pawel. "Propagation of surface initiated rolling contact fatigue cracks in bearing steel." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/44525.

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The useful life of mechanical components which experience highly stressed rolling/sliding contacts, such as rolling element bearings or gears, is limited by rolling contact fatigue (RCF). Surface initiated pitting is a mode of RCF which has in recent years received particular attention from industry due to its frequent occurrence in service. This work focuses on the growth behaviour of RCF cracks before they develop into surface pits. A three-contact disc machine was used to perform pitting experiments on bearing steel samples. Preliminary tests showed that surface initiated cracks could be re

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40

Clark, Yvonne Yumiko. "Antioxidant Treatment of Muscle Wasting and Fatigue in Tumor-Bearing Mice." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1373844738.

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41

Kang, JeeHyun. "Mechanisms of microstructural damage during rolling contact fatigue of bearing steels." Thesis, University of Cambridge, 2014. https://www.repository.cam.ac.uk/handle/1810/245255.

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Bearings are employed in a number of applications under extremely demanding conditions. During long operation times, the material undergoes rolling contact fatigue where microstructural damage manifests as dark-etching regions and white-etching areas, which display different properties from the surrounding region. The aim of this study is to identify the mechanisms for such damage and to suggest models that can explain the influence of the initial microstructure and test conditions. In order to appraise the stress state in rolling contacts, two testing techniques were employed and it was exami

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42

Nicholls, David John. "Structure-property relations in aluminium-lithium alloys." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238194.

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This work describes the effect of microstructure on the behaviour of small fatigue cracks in the two Al-Li-Cu-Mg-Zr alloys 8090 and 8091. The slip distribution in these alloys was varied through thermo-mechanical processing. Although slip distribution affected tensile, cyclic and long fatigue crack behaviour, it did not affect small fatigue crack behaviour due to low levels of closure and reduced slip reversibility near to a free surface. Similarly, underageing and overageing had no effect on small fatigue crack behaviour. Therefore, small fatigue crack growth is concluded to be insensitive to

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43

Bernard, Richard Joseph. "The fatigue crack growth behavior of Ti-24A1-11Nb as a function of temperature and load ratio." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/20187.

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44

Morrissey, Ryan J. "Frequency and mean stress effects in high cycle fatigue of Ti-6A1-4V." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/17095.

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45

Kupkovits, Robert Anthony. "Thermomechanical fatigue behavior of the directionally-solidified nickel-base superalloy CM247LC." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28160.

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Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Dr. Richard W. Neu; Committee Member: Dr. David L. McDowell; Committee Member: Dr. W. Steven Johnson.

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46

Ammar, Hany. "Effet des imperfections de la coulée sur les propriétés en fatigue des alliages de fonderie aluminium silicium = Effect of casting imperfections on the fatigue properties of aluminum-silicon casting alloys /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2006. http://theses.uqac.ca.

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47

Jordon, James Brian. "EXPERIMENTS AND MODELING OF FATIGUE AND FRACTURE OF ALUMINUM ALLOYS." MSSTATE, 2008. http://sun.library.msstate.edu/ETD-db/theses/available/etd-11062008-110529/.

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In this work, understanding the microstructural effects of monotonic and cyclic failure of wrought 7075-T651 and cast A356 aluminum alloys were examined. In particular, the structure-property relations were quantified for the plasticity/damage model and two fatigue crack models. Several types of experiments were employed to adapt an internal state variable plasticity and damage model to the wrought alloy. The damage model was originally developed for cast alloys and thus, the model was modified to account for void nucleation, growth, and coalescence for a wrought alloy. In addition, fatigue ex

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48

Simundjuntak, Sarinova. "Relationship between microstructure and fatigue performance of 26XX aluminium alloys." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251604.

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49

Davies, H. M. "Low temperature dwell sensitive fatigue in near alpha titanium alloys." Thesis, Swansea University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636387.

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The ambient temperature fatigue response of the near alpha titanium alloy Timetal 834 has been evaluated using specimens manufactured from two material sources:- hot-rolled barstock and an isothermally forged compressor disc. The effects of dwell periods imposed at peak stress and different R values were assessed. Significant differences were observed between the two alloy variants particularly with respect to their sensitivity to dwell loading. In particular it was found that dwell sensitivity is enhanced by high R values (R = 0.5) and longer dwell times but is reduced by compressive minimum

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50

Suddell, B. C. "Optimising fatigue through the control of texture in titanium alloys." Thesis, Swansea University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639128.

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Titanium alloys are used extensively throughout the aerospace sector in blades and discs of the low and intermediate sections of the compressors of modern Aeroengines. Titanium is used primarily as it has a high strength-to-weight ratio and good Fatigue and Creep resistance. Titanium 6-4 (Ti-6Al-4V) is the general "Workhorse" alloy of the Titanium family of alloys and has been extensively studied over the past 50 yeas. It is known that texture plays an important role in terms of its effect on the materials mechanical properties. The mechanical response of textured Ti 6/4 plate material is asse

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