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Rozprawy doktorskie na temat „Age hardening”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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Sprawdź 31 najlepszych rozpraw doktorskich naukowych na temat „Age hardening”.

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1

Kent, Damon. "Age hardening of sintered Al-Cu-Mg-Si-Sn alloys /." St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17893.pdf.

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2

Johnson, Lars. "Nanostructuring and Age Hardening in TiSCN, ZrAlN, and TiAlN Thin Films." Licentiate thesis, Linköpings universitet, Tunnfilmsfysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56221.

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This thesis explores nanostructuring in TiSiCN, ZrAlN, and TiAlN thin films deposited by cathodic arc evaporation onto cemented carbide substrates, with intended applications for cutting tools. The three systems were found to exhibit age hardening upon annealing, by different mechanisms, into the superhard regime (≥30 GPa), as determined by a combination of electron microscopy, X-ray diffraction, atom probe tomography, erda, and nanoindentation tech- niques. TiSiCN forms nanocomposite films during growth by virtue of Si segregation to the surface of TiCN nanocrystallites while simultaneously p

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3

Frigaard, Øyvind. "A process model for friction stir welding of age hardening aluminium alloys." Doctoral thesis, Norwegian University of Science and Technology, Department of Materials Technology, 1999. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1759.

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4

Esarey, John Gilbert. "Continuous measurement by eddy current methods of age hardening in aluminum alloys." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23592.

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Approved for public release; distribution is unlimited<br>Many materials processing operations such as age hardening heat treatments typically involve following predetermined time and temperature schedules to obtain the desired final material properties. The intelligent processing approach is to develop sensors for monitoring of material response to processing operation in real time. As an alloy age hardens its electrical resistivity changes. Hence, the process of aging can be monitored by measuring the change is resistivity relative to that of a non-age hardening material such as fully anne

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Beverini, Gianluca. "Phase transformations in binary uranium alloys." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292647.

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6

Nicol, Alison. "Aspects of copper precipitation and irradiation hardening in Fe-Cu alloys." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325841.

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7

Skoufari-Themistou, Leda. "Impact and yield strength behaviour of age-hardening, low-carbon copper-containing steels." Thesis, City University London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319641.

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8

Guapuriche, Manuel Antonio Salazar. "Evolution of Electrical Conductivity, Hardness and Strength during Age Hardening of AA 7010." Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507650.

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9

Khalfallah, Ibrahim. "Designing Microstructure through Reverse Peritectoid Phase Transformation in Ni₃Mo Alloy." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/78058.

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High-energy ball milling and powder metallurgy methods were used to produce a partially alloyed nickel and molybdenum of γ-Ni₃Mo composition (Ni-25at.%Mo). Milled powders were cold-compacted, sintered/solutionized at 1300°C for 100h sintering followed by quenching. Three transformation studies were performed. First, the intermetallic γ-Ni₃Mo was formed from the supersaturated solution at temperatures ranging between 600°C and 900°C for up to 100h. The 100% stable γ-Ni₃Mo phase was formed at 600°C after 100h, while aging at temperatures ranging between 650°C and 850°C for 25h was not sufficient

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10

James, Robert Bailey. "Resistivity measurement by eddy current methods for real-time monitoring of age hardening in heat treatable alloys." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA311567.

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11

PRASAD, PRASHANTH. "CHARACTERIZATION OF NEW, CAST, HIGH TEMPERATURE ALUMINUM ALLOYS FOR DIESEL ENGINE APPLICATIONS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1148315194.

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12

PADIAL, ARMANDO G. F. "Caracterizacao microestrutural do aco maraging de grau 400 de resistencia mecanica ultra-elevada." reponame:Repositório Institucional do IPEN, 2002. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10998.

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Made available in DSpace on 2014-10-09T12:46:42Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:56:09Z (GMT). No. of bitstreams: 1 07613.pdf: 5555459 bytes, checksum: 0047c9f052248797761d648268e841ba (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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13

Tan, Evren. "The Effect Of Hot-deformation On Mechanical Properties And Age Hardening Characteristics Of Al-mg-si Based Wrought Aluminum Alloys." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607937/index.pdf.

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Microstructural and mechanical characterizations of heat treatable Al-Mg-Si-Cu based wrought aluminum alloys have been studied. The aim of this work was to produce fine grained, high strength alloy by adjusting processing conditions: deformation, solutionizing and aging. First, primary characterization was carried out via SEM-EDS analyses and tensile tests. Then an extensive experimental study has been carried out on two sets of samples. The first set has been studied to determine the ideal conditions for solutionizing and aging processes by analyzing the variation of hardness with different s

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14

Marceau, Ross Kevin William. "Design in Light Alloys by Understanding the Solute Clustering Processes During the Early Stages of Age Hardening in Al-Cu-Mg Alloys." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/4008.

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The evolution of atomistic-level nanostructure during the early stages of both standard, high-temperature T6 heat treatment, and low-temperature secondary ageing after interruption of the former (T6I4), has been investigated in rapid hardening Al-Cu-Mg alloys using a variety of microscopy and microanalytical techniques, including transmission electron microscopy (TEM), positron annihilation spectroscopy (PAS) and atom probe tomography (APT). In order to carry out this objective, quantitative data-analysis methods were developed with respect to new cluster-finding algorithms, specifically desig

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15

Marceau, Ross Kevin William. "Design in Light Alloys by Understanding the Solute Clustering Processes During the Early Stages of Age Hardening in Al-Cu-Mg Alloys." University of Sydney, 2008. http://hdl.handle.net/2123/4008.

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Doctor of Philosophy (PhD)<br>The evolution of atomistic-level nanostructure during the early stages of both standard, high-temperature T6 heat treatment, and low-temperature secondary ageing after interruption of the former (T6I4), has been investigated in rapid hardening Al-Cu-Mg alloys using a variety of microscopy and microanalytical techniques, including transmission electron microscopy (TEM), positron annihilation spectroscopy (PAS) and atom probe tomography (APT). In order to carry out this objective, quantitative data-analysis methods were developed with respect to new cluster-finding

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16

Marceau, Ross K. W. "Design in light alloys by understanding solute clustering processes during the early stages of age hardening in Al-Cu-Mg alloys." Connect to full text, 2008. http://ses.library.usyd.edu.au/handle/2123/4008.

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Thesis (Ph. D.)--University of Sydney, 2008.<br>Title from title screen (viewed Jan 07, 2009). Includes two published articles co-authored with others. Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the Australina Key Centre for Microscopy and Microanalysis, Electron Microscope Unit, Faculty of Science. Includes bibliographical references. Also available in print form.

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17

Forsén, Rikard, M. P. Johansson, Magnus Odén, and Naureen Ghafoor. "Effects of Ti alloying of AlCrN coatings on thermal stability and oxidation resistance." Linköpings universitet, Nanostrukturerade material, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93255.

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Quaternary cubic (TixCr1 − xAl~ 0.60)1 N1 coatings with 0 < x < 0.33 have been grown using reactive cathodic arc evaporation. When adding Ti the hardness was retained after annealing up to 1100 °C which is a dramatic improvement compared to CrAlN coatings. The coatings showed an age hardening process caused by spinodal decomposition into coherent TiCr- and Al-rich cubic TiCrAlN domains and the formation of hexagonal AlN precipitates and cubic TiCrN domains in the vicinity of the grain boundaries. The improved hardness was attributed to the stabilization of the cubic structure suppressing

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18

Syed, Muhammad Bilal. "Thermal Stability of Arc Evaporated ZrCrAlN." Thesis, Linköpings universitet, Nanostrukturerade material, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-84769.

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This research explores the thermal stability of ZrCrAlN material system. For this purpose fourteen different compositions of ZrCrAlN coatings were deposited onto tungsten carbide substrates by using reactive cathodic arc evaporation. These compositions were further annealed at 800oC, 900oC, 1000oC and 1100oC temperatures. EDS was employed to specify the compositions. The crystal structure of the coatings were analysed by XRD, and the hardness of these coatings was determined by Nanoindentation. The experimental findings reported a significant age hardening of Zr0.16Cr0.12Al0.72N and a delayed

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19

CHEN, DONGSHENG. "酸化物分散強化フェライト鋼における鉄/クロム相分離挙動". Kyoto University, 2015. http://hdl.handle.net/2433/199548.

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20

CHEN, DONGSHENG. "Iron/Chromium Phase Decomposition Behavior in Oxide Dispersion Strengthened Ferritic Steels." Kyoto University, 2015. http://hdl.handle.net/2433/199417.

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21

Hwang, Junyeon. "Characterization and Mechanical Properties of Nanoscale Precipitates in Modified Al-Si-Cu Alloys Using Transmission Electron Microscopy and 3D Atom Probe Tomography." Thesis, University of North Texas, 2007. https://digital.library.unt.edu/ark:/67531/metadc3661/.

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Among the commercial aluminum alloys, aluminum 319 (Al-7wt%Si-4wt%Cu) type alloys are popularly used in automobile engine parts. These alloys have good casting characteristics and excellent mechanical properties resulting from a suitable heat treatment. To get a high strength in the 319 type alloys, grain refining, reducing the porosity, solid solution hardening, and precipitation hardening are preferred. All experimental variables such as solidification condition, composition, and heat treatment are influence on the precipitation behavior; however, precipitation hardening is the most signific

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22

Kovarik, Libor. "Microstructural study and modeling of metastable phases and their effect on strenghthening [sic] in Al-Mg-Cu-Si alloying system." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1149006665.

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23

Sasaki, Cassiano Massakazu. "Desempenho operacional de um subsolador em função da estrutura, do teor de argila e de água em três latossolos." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-15062005-150804/.

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A rápida evolução tecnológica da silvicultura brasileira, verificada na década de 80, culminou com o sistema de cultivo mínimo do solo, implantado em grande escala a partir do início da década de 90. Levantamentos recentes junto a empresas florestadoras de expressão nacional, indicaram que cerca de 77% da área plantada é realizada no sistema de cultivo mínimo do solo. O amplo emprego do subsolador no cultivo mínimo e a falta de estudos científicos no projeto, o empirismo associado à operação e a falta de informações sobre a interação entre o teor de água e o tipo de solo subsolado motivaram a

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24

Tort, Morgan. "The effects of severe plastic deformation on an age hardenable Al-2.5Cu-1.5Mg alloy." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22578.

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Les effets du pressage à canaux égaux (ECAP), un procédé de déformation plastique sévère, ont été examinés dans un alliage Al-2.5Cu-1.5Mg (pourcentage en masse) prône à être durci par traitement thermique et précipitant dans la région α + S. Une multitude de techniques microscopiques, calorimétriques et analytiques ont été utilisés pour caractériser et quantifier les microstructures, incluant la diffraction Kikuchi, la microscopie électronique en transmission, la calorimétrie différentielle à balayage et la sonde atomique tomographique. Quatre différents traitements thermiques initiaux ont été

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25

Balan, Alexandre. "Modélisation isotherme et anisotherme de la limite d'élasticité précipitation-dépendante de l'Inconel 718." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI003/document.

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Ce manuscrit de thèse présente les résultats de travaux concernant les effets des transitoires thermiques sur la précipitation des phases intermétalliques dans le superalliage base nickel Inconel 718® et les conséquences de cette précipitation sur les propriétés mécaniques de cet alliage. Ces travaux se concentrent sur une approche couplée capable de décrire l’évolution de la précipitation de la phase γ'' et ses conséquences sur la limite d’élasticité de l’Inconel 718®. L’état de précipitation est modélisé grâce à l’implémentation des équations de la théorie classique de germination et de croi

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26

Ibrahim, Hamdy Ibrahim. "Bioresorbable Magnesium-Based Bone Fixation Hardware: Alloy Design, Post-Fabrication Heat Treatment, Coating, and Modeling." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1503678544356525.

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27

Braik, Abdullah Mousa Darwish. "RELIABILITY AND COST ANALYSIS OF POWER DISTRIBUTION SYSTEMS SUBJECTED TO TORNADO HAZARD." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1543584694806575.

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28

Meyruey, Gwenaëlle. "Caractérisation et modélisation du vieillissement thermique d’un composite à base d’alliage d’Aluminium." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI092.

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Les composites à matrice métallique ont été développés dans les années 60 initialement pour les besoins de l’industrie aérospatiale. De nos jours, les alliages d’Aluminium à durcissement structural sont souvent combinés à des particules céramiques afin d’atteindre des propriétés de résistance élevées, maintenues à haute température, tout en conservant la légèreté de l’alliage, pour un coût faible. Cependant, l’utilisation de ces alliages nécessite une bonne connaissance des transformations microstructurales ayant lieu lorsqu’ils sont soumis à certaines conditions de température puisque des phé

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29

Ferris, William F., Terry R. McNelley, and Stephen J. Hales. "The age hardening response of thermomechanically processed Al-Mg-Li alloys." Thesis, 1987. http://hdl.handle.net/10945/22597.

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30

Chen, Kuo-Chan, та 陳國洲. "A Study on Age-Hardening Characteristics of Squeeze Castδ- Alumina Fiber-Reinforced Al(2024) Composites". Thesis, 1993. http://ndltd.ncl.edu.tw/handle/60907141904950726752.

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碩士<br>國立交通大學<br>材料科學(工程)研究所<br>81<br>Precipitation hardening can influence the mechanical properties of the alumina-reinforced aluminum alloy(2024) composites fabricated by squeeze casting method. Owing to the presence of alumina fibers, the aging behavior of alumina reinforced aluminum alloy is different from aluminum alloy(2024) . Therefore, the condition of heat treatment for aluminum alloy (2024) is not satisfied to alumina-reinforced aluminum alloy (2024) composites. In the present stu

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31

Hung, Cheng-Hsin, and 洪正欣. "Effect of age hardening by using Mo and Ti in substitution for Al or by adding them in Al0.3CoCrFeNi high entropy alloy." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/29787683934682096889.

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碩士<br>逢甲大學<br>材料科學所<br>97<br>This study discusses the effect of age hardening at 600-1000℃ by using Mo and Ti in substitution for Al or by adding them in an FCC Al0.3CoCrFeNi high entropy alloy. Six alloys represented by Al0.3CoCrFeNi, CoCrFeNiMo0.3, CoCrFeNiTi0.3, Al0.3CoCrFeNiMo0.1, Al0.3CoCrFeNiTi0.1, and Al0.3CoCr FeNiMo0.05Ti0.05 were synthesized. The Al0.3CoCrFeNi alloy reached its maximum hardness at 700℃-144 hrs aging. The strengthening is due to two precipitates of L12 and B2. The CoCrFeNiMo0.3 alloy reached its maximum hardness at 900℃-24 hrs aging in that a large quantity of rich Mo

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