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Dissertations / Theses on the topic 'Corrosion-mechanical wear'

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1

Sagoo, Kamaljeet S. "Wear and corrosion of mechanical seals." Thesis, Aston University, 1988. http://publications.aston.ac.uk/11884/.

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Mechanical seals are used extensively to seal machinery such as pumps, mixers and agitators in the oil, petrochemical and chemical industries. The performance of such machinery is critically dependent on these devices. Seal failures may result in the escape of dangerous chemicals, possibly causing injury or loss of life. Seal performance is limited by the choice of face materials available. These range from cast iron and stellited stainless steel to cemented and silicon carbides. The main factors that affect seal performance are the wear and corrosion of seal faces. This research investigated
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2

Scott, William Walter Jr. "Micro/Nanoscale Differential Wear and Corrosion of Multiphase Materials." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu994420446.

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3

Izadi, Sina. "Al/Ti Nanostructured Multilayers: from Mechanical, Tribological, to Corrosion Properties." Scholar Commons, 2016. https://scholarcommons.usf.edu/etd/6265.

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Nanostructured metallic multilayers (NMMs) are well-known for their high strength in smaller bilayer thicknesses. Six Al/Ti (NMM) with different individual layer thickness were tested for their mechanical hardness using a nanoindentation tool. Individual layer thicknesses were chosen carefully to cover the whole confined layer slip (CLS) model. Nano-hardness had a reverse relation with the square root of individual layer thickness and reached a steady state at ~ 5 nm bilayer thickness. Decreasing the layer bilayer thickness from ~ 104 nm to ~ 5 nm, improved the mechanical hardness up to ~ 101%
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4

Veyret-Abran, Christophe. "Friction and degradation of rubber coatings under fretting conditions." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/43827.

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A fundamental study was conducted to analyze the friction and degradation mechanisms of thin rubber coatings used as fretting corrosion inhibitors. Two elastomers, polyurethane and styreneethylene-butylene (SEBS), were investigated. The mechanisms of wear were studied by analyzing wear scars with optical microscopy. Friction mechanisms were investigated using friction forcedisplacement hysteresis loops and friction force variation with test frequency, fretting amplitude and fIlm thickness. Lastly, coating life variation with these three parameters was studied and explained through a simplified
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5

Ionescu, Claudiu Constantin. "Caractérisation des mécanismes d'usure par tribocorrosion d'alliages modèles Ni-Cr." Phd thesis, Ecole Centrale Paris, 2012. http://tel.archives-ouvertes.fr/tel-00782644.

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Les alliages à base nickel sont utilisés dans les centrales nucléaires pour la fabrication des tubes générateurs de vapeur, parce qu'ils présentent une bonne résistance aux sollicitations mécaniques élevées dans un milieu corrosif à haute température. La résistance au milieu corrosif est attribuée à une couche protectrice très fine de Cr2O3 qui se forme à la surface de l'alliage. Les tubes générateurs de vapeur comptent parmi les composants les plus délicats à entretenir, d'une part, du fait de leur importance pour la sûreté et, d'autre part, parce que les tubes d'échange sont soumis à de nomb
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6

Mathew, Paul. "Study of rotational fretting of quenched and tempered 4340 steel." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/51771.

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Fretting phenomenon occurs when two bodies in contact undergo small repetitive relative motion such that the localized surface and subsurface material properties are altered leading to damage or failures. Fretting conditions are obtained by controlling externally applied parameters such as load, frequency of displacement, displacement amplitude. Material properties which influence fretting behavior include hardness, ductility, hardening behavior. External parameters like surface roughness, temperature also play a role in deciding the extent of damage. Based on fretting conditions and specimen
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7

Ayyagari, Venkata A. "Surface Degradation Behavior of Bulk Metallic Glasses and High Entropy Alloys." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1062863/.

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In this study, the surface degradation behavior was studied for typical examples from bulk metallic glasses (BMGs), metallic glass composites (MGCs) and high entropy alloys (HEAs) alloy systems that are of scientific and commercial interest. The corrosion and wear behavior of two Zr-based bulk metallic glasses, Zr41.2Cu12.5Ni10Ti13.8Be22.5 and Zr57Cu15.4Ni12.6Al10Nb5, were evaluated in as-cast and thermally relaxed states. Significant improvement in corrosion rate, wear behavior, and friction coefficient was seen for both the alloys after thermal relaxation. Fully amorphous structure was retai
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8

Strahin, Brandon L. "WEAR AND CORROSION RESISTANT TRIBOLOGICAL SURFACE TREATMENTS FOR TITANIUM ALLOYS: EVALUATION OF COMPLIMENTARY AND SUPPLEMENTARY DUPLEX TREATMENT PROCESSES." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1555110923128525.

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9

Paul, Arindam. "Development and evaluation of NiW alloy and NiW-TiO2 composite coatings on the mechanical properties, tribological performance and the corrosion resistance of bearing steel." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1618853855083468.

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10

Gastaldo, Felipe Toloi. "Efeitos do tratamento de superfície a laser na microestrutura e na resistência ao desgaste do aço inoxidável martensítico." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265468.

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Orientador: Maria Clara Filippini Ierardi<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-16T18:14:43Z (GMT). No. of bitstreams: 1 Gastaldo_FelipeToloi_M.pdf: 3864276 bytes, checksum: e93dd961bf6a205b380e820ec16cb28f (MD5) Previous issue date: 2010<br>Resumo : No presente trabalho o aço inoxidável martensítico ASTM 487 CA6NM utilizado na fabricação de eixos de turbinas, foi submetido ao tratamento de superfície por refusão a laser com o intuito de analisar as modificações microestruturais resultantes e seu
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11

Larosa, Maria Aparecida. "Análise da resistência à corrosão e ao desgaste do aço inoxidável austenítico ASTM F 138 tratado por laser." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263545.

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Orientador: Maria Clara Filippini Ierardi<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-16T17:12:39Z (GMT). No. of bitstreams: 1 Larosa_MariaAparecida_D.pdf: 10660809 bytes, checksum: a977970425db7202c5a36a0e2a30a789 (MD5) Previous issue date: 2010<br>Resumo: No presente trabalho, o aço inoxidável austenítico ASTM F 138, empregado na fabricação de implantes ortopédicos temporários e permanentes, foi submetido a tratamento de superfície por laser, com o intuito de analisar as modificações microestruturais resul
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12

Snider, James M. "Zinc pot bearing material wear and corrosion characterization." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=3716.

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Thesis (Ph. D.)--West Virginia University, 2004.<br>Title from document title page. Document formatted into pages; contains xx, 272 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 207-208).
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13

Mutyala, Kalyan Chakravarthi. "Influence of Metallic, Dichalcogenide, and Nanocomposite Tribological Thin Films on The Rolling Contact Performance of Spherical Rolling Elements." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1447751680.

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14

Darbeïda, Abdelhamid. "Mise au point d'une démarche expérimentale de caractérisation de la tenue mécanique des dépôts durs protecteurs de chrome et d'acier inoxydable : mécanismes d'endommagement sous sollicitations avec contact en relation avec les caractéristiques microstructurales." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL006N.

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On présente une démarche expérimentale de caractérisation de la tenue mécanique des matériaux revêtus. Cette démarche est basée sur les tests de complexité croissante: 1 d'indentation Vickers sous forte charge normale, 2 de rayure monopasse à charge normale croissante et constante, 3 de frottement et d'usure par rayure multipasses à charge normale constante et par usure pion-disque. Appliquée à des revêtements d'acier inoxydable austénitique AISI 316L enrichi en azote et sur des revêtements de chrome (de 5 à 30 [micro]m d'épaisseur), la démarche a permis de dégager les principaux facteurs méca
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15

Hsu, YiTe, and 許益得. "Studies on the Mechanical Properties and Corrosion Wear Behavior of SiC/A390 Al-matrix Composites." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/14844111912448593917.

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碩士<br>國立臺灣師範大學<br>工業教育研究所<br>87<br>The primary purpose of this research was to investigate the effects of SiC particles (SiC<p>) size (46μm、80μm ) and the amount of reinforcements (5wt%、10wt%), solid solution treatment (480℃,3 hours), articificial aging (150℃, 1、3、10 hours) and the environments of corrosion wear (distilled water、3.5wt% NaCl solution) on the mechanical properties and corrosion wear behavior of SiC<p>/A390 Al-matrix composites. The results show that the increasing of SiC<p> size and the amount of reinforcements increased the hardness and the corrosion wear resistance
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16

Wang, Yuanyuan. "Material Wear in Multilayered Separable Electrical Contacts: Modeling and Experimentation." Thesis, 2015. https://doi.org/10.7916/D8X63MM4.

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In electrical contacts, thin films of nickel and gold or silver are traditionally plated on top of a copper base plate to provide corrosion resistance and wear protection. Most recently, the rising cost of noble metals and intensified competition in manufacturing technology has driven the industry towards thinner plating layers, which gives rise to questions regarding how interfacial contact and wear is affected by plating thickness and material characteristics. This study uses a combination of finite element analysis and ex-situ wear measurement to determine the effect of gold plating thickne
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17

(6632399), Jianyue Zhang. "Effect of Ultrasonic Shot Peening on Mechanical Properties and Corrosion Resistance of MG Alloy Sheet." Thesis, 2019.

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<div>Magnesium alloys are regarded as the most promising structure materials in transportation and aerospace fields because of their low densities and high specific strengths. However, the unsatisfactory mechanical performance and corrosion resistance restrict their applications. Grain refinement is an effective way to improve the mechanical properties and widen the applications. Among which, ultrasonic shot peening shows a great potential in producing refined grains or even nanocrystalline. A nanocrystalline forms at the surface after ultrasonic shot peening treatment. The formed nanocrystall
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18

Ye, Lujie. "Towards commercialization of self-healing technology in epoxy coating." Thesis, 2014. http://hdl.handle.net/1805/5613.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>This work is focused on developing viable self-healing coatings, especially considering the viability of the coating in a commercial context. With this in mind, finding low cost healing agents, with satisfactory healing and mechanical properties as well as adapting the healing system for use in coatings was required. Seven potential healing agents were evaluated and an air-drying triglyceride (linseed oil) was identified as the candidate healing agent. Different encapsulation techniques were evaluated and ureaformaldehyde microcapsul
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19

Ganguly, Sourav. "Creep, Tensile, Wear and Corrosion Behaviour of SiC Nanoparticles Reinforced Squeeze-Cast AZ91-Ca-Sb Magnesium Alloy." Thesis, 2020. http://ethesis.nitrkl.ac.in/10162/1/2020_PhD_SGanguly_514MM6011_Creep.pdf.

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In the present thesis, the influence of SiC nanoparticles additions on the creep, tensile, wear, and corrosion behaviour of the AZ91-2.0Ca-0.3Sb (wt.%) alloy fabricated by squeeze-casting has been investigated. For comparison, these properties are also investigated in the AZ91- 2.0Ca-0.3Sb alloy without nanoparticles addition. The nominal compositions of the fabricated alloy and nanocomposites are AZ91-2.0Ca-0.3Sb (AZXY9120), AZ91-2.0Ca-0.3Sb-0.5SiCnp (NC1), AZ91-2.0Ca-0.3Sb-1.0SiCnp (NC2), and AZ91-2.0Ca-0.3Sb-2.0SiCnp (NC3) (wt.%). A detailed microstructural characterization of the alloy and
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20

Deuis, Robert Leslie. "Aqueous corrosion and tribological properties of metal matrix composite coatings produced by plasma transferred arc surfacing." 1997. http://arrow.unisa.edu.au:8081/1959.8/80086.

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