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Dissertations / Theses on the topic 'Welded Zone'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Meyer, Arnold Matthys. "Intersitial diffusion from the weld metal into the high temperature heat affected zone in 11-12% chromium steel welded joints." Pretoria : [s.n.], 2000. http://upetd.up.ac.za/thesis/available/etd-09292008-100709/.

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2

Lundberg, Axel. "Temperature profiles and hardness estimation of laser welded heat affected zone in low carbon steel." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20830.

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Termisk modellring av hårdhet genom beräkning och simulering av den värmepåverkade zonen i en lasersvetsad stålplatta är en omfattande process. Dock är analysen viktig då mikrostrukturella fastransformationer förorsakade av svetsningen kan ge oönskade hårdhetsnivåer av den värmepåverkade zonen jämfört med hårdeheten i basmaterialet. I denna avhandling har analytiska ekvationer implementerats och testats för validitet mot simuleringar gjorda av andra författare och mot experimentella värden.Eftersom termisk modellering av svetsar är ett omfattande område var avhandlingen tvungen att smalnas av

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3

Cadieux, Gérard. "Influence of heat treatment on heat affected zone microfissuring in EB welded Microcast-X Inconel 718." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0027/MQ32068.pdf.

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4

Dang, Weidong. "Finite element modelling of hybrid (spot welded/bonded) joints under service conditions." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2187/document.

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Le soudage par point et le collage sont largement utilisés dans la jonction des tôles, telles que l'assemblage de caisses de voiture. Récemment, le soudage par point et le collage ont été combinés pour faire le joint hybride soudé-collé, qui est utilisé pour joindre les aciers à hautes résistances et améliorer la rigidité et la résistance aux chocs des corps de voiture. Dans l'industrie, l'évaluation de la conception avant prototype nécessite des modèles fiables de comportement en termes de prédiction des comportements mécaniques. Le modèle élément finis de joint soudé-collé est un nouveau déf

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5

Tribe, Allan M. "Study on the Fracture Toughness of Friction Stir Welded API X80." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3740.

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High strength low alloy (HSLA) steels have been developed to simultaneously have high yield strength and high fracture toughness. However, in practical applications steel must be welded. Traditional arc welding has proven detrimental to the fracture toughness of HSLA steels. Friction stir welding has recently shown mixed results in welding HSLA steels. The range of welding parameters used in these recent studies however has been very limited. With only a few welding parameters tested, the effect of spindle speed, travel speed, and heat input on the fracture toughness of friction stir welded HS

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6

Nuruddin, Ibrahim K. "Effect of welding thermal cycles on the heat affected zone microstructure and toughness of multi-pass welded pipeline steels." Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7755.

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This research is aimed at understanding the effect of thermal cycles on the metallurgical and microstructural characteristics of the heat affected zone of a multi-pass pipeline weld. Continuous Cooling Transformation (CCT) diagrams of the pipeline steel grades studied (X65, X70 and X100) were generated using a thermo mechanical simulator (Gleeble 3500) and 10 mm diameter by 100 mm length samples. The volume change during phase transformation was studied by a dilatometer, this is to understand the thermodynamics and kinetics of phase formation when subjected to such varying cooling rates. Sampl

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7

Clark, Tad Dee. "An Analysis of Microstructure and Corrosion Resistance in Underwater Friction Stir Welded 304L Stainless Steel." Diss., BYU ScholarsArchive, 2005. http://contentdm.lib.byu.edu/ETD/image/etd872.pdf.

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8

Postal, Germano Tagliari. "Projeto e fabricação de microtribômetro para análise de juntas soldadas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/179571.

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Este trabalho apresenta o desenvolvimento de um microtribômetro linear, do tipo esfera sobre chapa, capaz de analisar o comportamento tribológico de materiais em linhas até 5 mm de comprimento, frequências de até 2 Hz e cargas até 10 N, com ou sem meio úmido, características que o tornam uma ótima ferramenta para observar o comportamento tribológico, ou a resistência ao desgaste de diferentes zonas de uma junta soldada. Durante o projeto do microtribômetro, houve a preocupação de desenvolver um equipamento seguro, fácil de operar e robusto, visando a utilização do mesmo por alunos de graduação

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9

Chan, Toong Khuan. "Stress concentrations in weld heat affected zones in aluminium-zinc-magnesium alloy." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259442.

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10

Stevens, Peter Alastair. "Shear zone properties of inertia friction welds." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5770/.

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Inertia weld process variables arc characterised using empirical relations that arc functions of the weld input parameters, allowing the variables to be predicted for any future production welds. The techniques for establishing the empirical relations can be applied to future alloy system for inertia welding by using significantly refined test matrices, reducing the development costs of new welds. Power loss in the bearings for two inertia welding machines is characterised by using hydrostatic bearing theory and several experimental techniques. This allows energy-based empirical relations for

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11

Тараєвський, О. С. "Вплив параметрів режиму роботи газопроводу на його безаварійну експлуатацію". Thesis, Івано-Франківський національний технічний університет нафти і газу, 2007. http://elar.nung.edu.ua/handle/123456789/4222.

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Дисертація присвячена розробці ефективних методів впливу параметрів режиму роботи газопроводу на його безаварійну експлуатацію. В роботі вирішуються задачі визначення впливу нерівномірності споживання газу на напружений стан газопроводу, встановлення картини руху газу, а також виявлення закономірностей пульсацій та їхній вплив на безаварійну експлуатацію газопроводу. Виявлені основні закономірності втомного руйнування зварного з’єднання сталі 17Г1С газопроводу при різних рівнях навантаження в наводнювальному середовищі та встановлено чутливість до водневої крихкості під час поляризації з одноч

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12

Martin, Sebastian. "Subduction zone wave guides : deciphering slab structure using intraslab seismicity at the Chile-Peru subduction zone." Phd thesis, Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2005/582/.

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Subduction zones are regions of intense earthquake activity up to great depth. Sources are located inside the subducting lithosphere and, as a consequence, seismic radiation from subduction zone earthquakes is strongly affected by the interior slab structure. The wave field of these intraslab events observed in the forearc region is profoundly influenced by a seismically slow layer atop the slab surface. This several kilometer thick low-velocity channel (wave guide) causes the entrapment of seismic energy producing strong guided wave phases that appear in P onsets in certain regions of the fo

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13

Smith, Richard Dominic. "Hydrogen distribution and redistribution in the weld zone of constructional steels." Thesis, Brunel University, 1999. http://bura.brunel.ac.uk/handle/2438/4617.

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The invention of electric arc welding revolutionized the steel construction industry, but also brought some problems when the welded region has inferior properties compared to the plate metal. A major cause of brittle failure was identi ed as hydrogen embrittlement of the weld zone, although a comprehensive understanding of this phenomenon is not, even now, available. Hydrogen in solution in the weld zone is found in arc welds, due to the intense conditions in the welding arc. There is invariably a sufficient source in the form of moisture and hydrocarbon residue to give a few parts-per-millio

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14

Lee, Jongsub. "A study of weld fusion zone phenomena in cast gamma titanium aluminides /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487864485228894.

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15

Varol, Ilhan. "Microstructure/property relationships in the weld heat-affected zone of duplex stainless steels /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487777170406281.

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16

Mallory, Louise Caithness. "A study of weld heat-affected zone phenomena in cast gamma titanium aluminides /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487942182324556.

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17

Huang, Xiao. "A microstructural study of heat affected zone microfissuring of electron beam welds in cast alloy 718." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1994. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23611.pdf.

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18

Stritch, Kyle B. "Microstructural Evolution and Mechanical Properties in Simulated Heat Affected Zone Regions of Grade 91 Steel Welds." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471444438.

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19

West, Scott Lewis. "A study of weld heat-affected zone liquation cracking in cast nickel-base superalloys." Connect to resource, 1991. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1248456984.

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20

Lata, William Peter. "An Investigation of Heat-Affected Zone and Weld Metal Liquation Cracking in Incoloy 903." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1394729582.

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21

Hodgson, David K. "The Post Weld Heat Treatment Response in the Heat Affected Zone of 2.25Cr-1Mo Steel." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1367416587.

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22

Lolla, Sri Venkata Tapasvi. "Understanding the Role of Initial Microstructure on Intercritically Reheated Heat Affected Zone Microstructure and Properties of Multi-Pass Welds." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397826410.

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23

Phung-on, Isaratat. "An investigation of reheat cracking in the weld heat affected zone of type 347 stainless steel." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1188419315.

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24

Norris, Richard H. "Creep crack growth behavior in weld metal/base metal/fusion zone regions in chromium molybdenum steels." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/19451.

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25

Reed, Roger Charles. "The characterisation and modelling of multipass steel weld heat-affected zones." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334220.

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26

Silva, Maurício de Carvalho. "Determinação experimental da tenacidade à fratura da zona termicamente afetada de junta soldada de aço API 5L X80." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3135/tde-11082010-160030/.

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Este trabalho investiga a possível correlação existente entre os baixos valores de CTOD e a ocorrência de zonas frágeis localizadas (ZFL) presentes na região de grãos grosseiros (RGG) da zona termicamente afetada (ZTA) de uma junta soldada de aço API 5L X80. Para isto, foi necessário obter corpos-de-prova SE(B) a partir de uma chapa de aço API 5L X80 a qual foi soldada numa junta ½V, para facilitar o posicionamento do entalhe na RGG da ZTA. As dimensões dos corpos-de-prova SE(B) utilizados foram espessura B=17mm, largura W=34mm, distância entre os apoios dos roletes S=138mm e uma relação entre

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27

Borchers, Tyler Edward. "Weldability and Corrosion of 7xxx Series Aluminum Alloys." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471362806.

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28

Kumara, Chamara. "Modelling of the temperature field in TIG arc heat treated super duplex stainless steel samples." Thesis, Högskolan Väst, Avdelningen för maskinteknik och naturvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-9590.

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Super Duplex Stainless Steels have superior corrosion resistance properties and strength compared to conventional steels. However, these properties are influenced by the different phases that precipitate during the heat treatment process. The conventional way of studying the time and temperature effects on the properties and micro-structure of SDSS is to prepare many samples at different temperatures and holding times. The welding research group at Production Technology Center, Trollhättan, Sweden, has recently developed a unique heat treatment method to produce a wide range of temperature by

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29

Stadler, Marine. "Etude expérimentale du mouvement hydrodynamique d'un bain métallique et de sa production de vapeurs sur une configuration de soudage TIG." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30019/document.

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Le soudage à électrode réfractaire, plus souvent appelé TIG (Tungsten Inert Gas), est un procédé dans lequel un arc électrique est généré entre une électrode en tungstène et les pièces à souder sous un flux gazeux inerte. Le transfert d'énergie entre l'arc et l'anode donne naissance à un bain métallique et à la production de vapeurs. La qualité des soudures obtenues est directement liée au comportement du plasma et aux phénomènes physiques présents dans le bain métallique (effets Marangoni, force de traînée, gravité, forces de Laplace, conduction thermique...). L'objectif de ces travaux de thè

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30

Kivineva, Esa. "The Influence of Composition and Hot Processes on Heat Affected Zone and Weld Metal Behavior and Mechnacal Properties of Ti Grade 5 and Stainless Steel." Doctoral thesis, KTH, Production Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3691.

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<p>This thesis discusses on results of experiments carried outwith austenitic, duplex and super duplex stainless steels andTi-6Al-4V. In these it has been seen that the heat cycle duringwelding or weld simulation has a great effect on the propertiesof thematerials. The properties are related to the resultedgrain size after processing, as well as, to the chemicalcomposition of the material. The thesis discusses on the grainsize resulted after hot processing and how the properties areinfluenced by it. Also, it has been seen how large grain sizeinfluences the fracture toughness of the duplex stai

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31

Medouni, Ilyes. "Etude par sonde atomique tomographique de l'effet du vieillissement thermique dans la zone affectée thermiquement des liaisons bimétalliques des EPR." Electronic Thesis or Diss., Aix-Marseille, 2022. http://theses.univ-amu.fr.lama.univ-amu.fr/220713_MEDOUNI_363rphuj400q455vvbwye980ijiaee_TH.pdf.

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Les conditions de fonctionnement à température relativement élevée de la cuve du réacteur d’une centrale EPR conduisent à une modification des propriétés mécaniques des matériaux, notamment celles des soudures (ou liaisons) BiMétalliques entre la cuve et le système de refroidissement primaire. La possible fragilisation de ces liaisons induite par ce vieillissement dit « thermique » doit rester mineure et ne pas remettre en question le cahier des charges du matériau. La fragilisation par vieillissement thermique des aciers est généralement associée à la ségrégation des atomes de phosphore aux j

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32

Pichot, François. "Développement d’une méthode numérique pour la prédiction des dimensions d’un cordon de soudure tig : application aux superalliages bases cobalt et nickel." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14489/document.

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Le procédé de soudage TIG est actuellement le plus utilisé dans l’industrie aéronautique du fait de la qualité des joints de soudure qu’il permet d’obtenir et de sa simplicité d’automatisation. Une opération de soudage provoque des gradients thermiques dus au passage de la source de chaleur sur la pièce qui induisent des déformations et des contraintes résiduelles pouvant impacter la durée de vie de l’assemblage. Ce travail vise à mettre en place un modèle de simulation de ce procédé dans le but d’optimiser les paramètres opératoires.Avant d’envisager un couplage thermomécanique, il convient d

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33

Juhas, Mary Catherine. "The effect of low temperature isothermal heat treatments on the intergranular corrosion of AISI 316 stainless steel simulated weld heat affected zones /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487673114115915.

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34

Itoh, Yoshito, Yasuo Kitane, Naohiko Watanabe, 義人伊藤, 安雄北根 та 尚彦渡邉. "一般構造用鋼管へのあて板湿式水中溶接補修の継手挙動のモデル化". 土木学会, 2009. http://hdl.handle.net/2237/18843.

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35

Cheng, Pei-Yuan. "Influence of residual stress and heat affected zone on fatigue failure of welded piping joints." 2009. http://www.lib.ncsu.edu/theses/available/etd-12182008-135133/unrestricted/etd.pdf.

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36

Meyer, Arnold Matthys. "Interstitial diffusion from the weld metal into the high temperature heat affected zone in 11-12% chromium steel welded joints." Diss., 2000. http://hdl.handle.net/2263/28282.

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37

Cadieux, Gerard. "Influence of heat treatment on heat affected zone microfissuring in EB welded Microcast-X Inconel 718." 1997. http://hdl.handle.net/1993/1287.

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A new form of cast Inconel 718 has recently been receiving attention. This new form is known as Microcast-X (MX) investment cast alloy 718. Specimens were given an initial pre-weld homogenization heat treatment at 1200$\sp\circ$C and water quenched followed by solution heat treatments at 1050, 1100, and 1150$\sp\circ$C which were designed to maintain a fine-grained and "clean" microstructure while allowing sufficient time for equilibrium segregation of sulfur. Both air cooling and water quenching were used for each solution heat treatment to study the effect of cooling rate on both boron segre

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38

Chien, Chih-Hung, and 簡志宏. "Corrosion Study for the Inter-granular of Welded Zone of Stainless Steels in 3.5%NaCl Solution." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/16181058531332628955.

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碩士<br>國立臺北科技大學<br>材料及資源工程系碩士班<br>88<br>The sensitization temperature of austenitic stainless steel has been confirmed from previous literature, which is in the range between 450℃and 850℃. During the Gas Tungsten Arc Welding process(GTAW),it is inevitable that the weld has to heated or cooled in this range. Effects of the heat flow input and weld quench process on the sensitization kinetics can be studied through the experimental design based upon this idea. The ASTM A262-93a corrosion practice, potentiodynamic polarization, and AC impedance are employed for the sensitization measure

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39

Ming-HsiangKu and 古明祥. "Effects of Microstructural Factors on Ductile-to-Brittle Transition of Friction Stir Welded Zone of 7075 Aluminum Alloy." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/x3j4bj.

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40

Ola, Oyedele Temitope. "Microstructural Analysis of Linear Friction Welded Joint in Nickel-Base Inconel 738 Superalloy." 2011. http://hdl.handle.net/1993/4372.

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Inconel 738 (IN 738), like other precipitation-hardened nickel-base superalloys that contain a substantial amount of Al and Ti, is very difficult to weld due to its high susceptibility to heat-affected zone (HAZ) cracking during conventional fusion welding processes. The cause of this cracking, which is usually intergranular in nature, has been attributed to the liquation of various phases in the alloy, subsequent wetting of the grain boundaries by the liquid and decohesion along one of the solid-liquid interfaces due to on-cooling tensile stresses. To address the problem of liquation cracking

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41

Huang, Chen-Che. "Partially melted zone in aluminium welds." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.

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42

Nogueira, Leandro Filipe de Jesus. "Rotura diferida em soldadura laser de materiais dissimilares." Master's thesis, 2021. http://hdl.handle.net/10316/97996.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia<br>O interesse pela soldadura laser de metais dissimilares, para a produção de componentes de transmissão, tem vindo a aumentar no seio da indústria automóvel, uma vez que permite aliar excelentes propriedades e requisitos de projeto a custos reduzidos. As juntas dissimilares, apesar de atenderem a requisitos de projeto complexos, apresentam problemas de soldabilidade, relacionados com as diferenças nas propriedades físicas, químicas e mecânicas dos metais envolvidos na ligação.No fabrico

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43

K, M. Saranath. "Zone Wise Local Characterization of Welds Using Digital Image Correlation: Uniform Stress and Virtual Fields Method." Thesis, 2014. http://raiith.iith.ac.in/150/1/ME12M1023.pdf.

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The process of welding is associated with high and varying thermal gradients across the weld, resulting in inhomogeneous material properties surrounding the weldment. A proper understanding of the varying mechanical properties of the weld and surrounding materials is important in designing and modelling of components with weld. In the initial study the characterisation of dierent zones such as fusion zone, heat aected zones and unaected base material of a deposited weld is carried out using uniform stress method (USM) involving digital image correlation (DIC) technique. A methodology usi

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44

ZHEN, CHUN-DE, and 鄭春德. "A study to the characteristics of age hardened aluminum-manganese steel weld heat affected zone." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/71047074699717050312.

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45

Marquez, Alberto C. "Finite element analysis of welds attaching short doubler plates in steel moment resisting frames." Thesis, 2014. http://hdl.handle.net/2152/28259.

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A number of recent research studies have investigated the performance of panel zones in seismic-resistant steel Special Moment Resisting Frames (SMF). These recent studies investigated various options for attaching doubler plates to the column at beam-column joints in SMF for purpose of increasing the shear strength of the panel zone. This previous work was primarily focused on doubler plates that extend beyond the top and bottom of the attached beams, and considered cases both with and without continuity plates. As an extension to this previous research, this thesis explores the situation whe

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46

RAJ, DESH. "STUDY AND ANALYSES OF ARC LENGTH CORRECTION AND MECHANICAL PROPERTIES ON WELD BEAD GEOMETRY FOR AA6061T6 BY COLD METAL TRANSFORMATION PROCESS." Thesis, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18941.

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Welded aluminium AA6061T6 joints have a wide range of industrial applications due to their low cost, lightweight, and excellent efficiency. In the automation industry, thin aluminium AA6061T6 of various thicknesses is widely utilized. Traditional welding procedures have always had issues with burn-through and distortion when welding these light aluminium AA 6061T6 joints due to their high heat input and large spatters. Because of its low distortion rate and low heat input, the CMT welding technique is an excellent choice for attaching thin sheets. In this study, Aluminium AA 6061

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47

Idowu, Oluwaseun Ayodeji. "Heat Affected Zone Cracking of Allvac 718Plus Superalloy during High Power Beam Welding and Post-weld Heat Treatment." 2010. http://hdl.handle.net/1993/3911.

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The present dissertation reports the findings of a study of cracking behavior of a newly developed superalloy, Allvac 718Plus during high power beam welding and post-weld heat treatment. Microstructures of the base alloy, heat affected zone (HAZ) and fusion zone (FZ) of welded and post-weld heat treated (PWHT) coupons were examined by the use of standard metallographic techniques involving optical microscopy, analytical scanning electron microscopy (SEM) and analytical transmission electron microscopy. Moreover, grain boundary segregation behavior of boron atoms during pre-weld heat treatments

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Chang-LungWang and 王昌隆. "The Study of Weld Decay Zone in SUS 304 Stainless Steel and Repairing Technique of Laser Surface Melting." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/23453783970142532468.

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49

Churchman, Craig. "The influence of electron beam welding parameters on heat affected zone and weld metal cracking of Ni-based superalloys." 2009. http://hdl.handle.net/1993/21430.

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Pepin, Joel. "Effects of Submerged Arc Weld (SAW) Parameters on Bead Geometry and Notch-Toughness for X70 and X80 Linepipe Steels." Master's thesis, 2009. http://hdl.handle.net/10048/665.

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For the manufacture of higher strength pipelines to be feasible, a better understanding of the effects of welding on toughness is necessary. Bevel submerged arc welds were performed on X80 grade steel. The subsequent Charpy V-notch (CVN) test results indicated that the notch placement in the various heat affected zone regions, and hence the bead geometry, affected the test results. A series of bead-on-plate (BOP) submerged arc welds then were performed on X70 grade steel plate to determine the effects of current, voltage, heat input, polarity, and waveform manipulation (i.e., balance, offset,

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