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Dissertations / Theses on the topic 'Dissimilar metal welding'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Stewart, Jeffrey. "Temper Bead Welding for Dissimilar Metal Welds and Overlays." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574840746589766.

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2

Xu, Lei. "Controlling interfacial reaction in aluminium to steel dissimilar metal welding." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/controlling-interfacial-reaction-in-aluminium-to-steel-dissimilar-metal-welding(721d3009-de49-434c-bd81-b01ff5973706).html.

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Two different aluminium alloys, AA6111 (Al-Mg-Si) and AA7055 (Al-Mg-Zn), were chosen as the aluminium alloys to be welded with DC04, and two welding methods (USW and FSSW) were selected to prepare the welds. Selected pre-welded joints were then annealed at T=400 - 570oC for different times. Kinetics growth data was collected from the microstructure results, and the growth behaviour of the IMC layer was found to fit the parabolic growth law. A grain growth model was built to predict the grain size as a function of annealing time. A double-IMC phase diffusion model was applied, together with gra

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3

Zhang, kaiwen. "Experimental and Computational Investigation of Temper Bead Welding and Dissimilar Metal Welding for Nuclear Structures Repair." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1469036863.

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4

Sorensen, Daniel David. "Dissimilar Metal Joining in the Medical Device Industry." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1494157928729494.

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5

Lee, Genevieve W. "Advanced Characterization of Solid-State Dissimilar Material Joints." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492794418438023.

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6

Wang, Yin. "A metallurgical approach for controlling interfacial reaction in aluminium to magnesium dissimilar metal welding." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/a-metallurgical-approach-for-controlling-interfacial-reaction-in-aluminium-to-magnesium-dissimilar-metal-welding(baf9186c-449e-44f3-9a1e-20dfde48b966).html.

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Dissimilar welding of Al to Mg alloys could potentially find significant application in the automobile industry, if the massive production of brittle intermetallic compounds (IMCs) at the joint interface can be prevented. In order to better understand Al-Mg IMC reactions, a comprehensive investigation of the interfacial region in AA6111 - AZ31 diffusion couples was carried out in this research. Three Al-Mg binary IMCs, namely the -Al12Mg17, -AlMg and -Al3Mg2 phases, were observed to form in the Al - Mg diffusion couple. In both the Al3Mg2 and Al12Mg17 layers, residual stresses were dete

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7

Liu, Bert C. Liu. "Joining Dissimilar Structural Alloys by Vaporizing Foil Actuator Welding: Process Conditions, Microstructure, Corrosion, and Strength." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471629967.

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8

Daniels, Thomas W. "APPLICABILITY OF COLD METAL TRANSFER FOR REPAIR OF DISSIMILAR METAL WELDS IN STAINLESS STEEL PIPING IN NUCLEAR POWER PLANTS." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429873704.

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9

Wolcott, Paul Joseph. "Ultrasonic Additive Manufacturing: Weld Optimization for Aluminum 6061, Development of Scarf Joints for Aluminum Sheet Metal, and Joining of High Strength Metals." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449162671.

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10

Siemssen, Brandon Raymond. "Development and Characterization of Friction Bit Joining: A New Solid State Spot Joining Technology Applied to Dissimilar Al/Steel Joints." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2425.pdf.

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11

Kapil, Angshuman. "Aspects of Vaporizing Foil Actuator Welding for Practical Automotive Applications." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu160579631346214.

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12

Suma, Emeric Emmanuel. "Using Duplex Stainless Steel to Join X65 Pipe Internally Clad with Alloy 625 for Subsea Applications." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492696298842902.

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13

Sowards, Jeffrey William. "Development of a chromium-free consumable for joining stainless steel." Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1237845645.

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14

Joesbury, Adam Michael. "New approaches to composite metal joining." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/10009.

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This thesis explores new methods for achieving load-carrying joints between the dissimilar materials of continuous fibre reinforced polymer matrix composites and structural metals. The new composite-to-metal joining methods investigated in this work exploit the metal-to-metal joining techniques of arc micro-welding, resistance spot welding, and metal filler brazing, to form novel micro-architectured metal adherends that can be used for enhanced composite-to-metal joining. Through a combination of equipment instrumentation and metallographic inspection of fabricated prototype joints, understand

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15

Bäck, Mimmi. "Welding of dissimilar metals in different welding positions." Thesis, KTH, Materialvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-184241.

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The three boiling water reactors (BWR) in Oskarshamn produce about 10 % of the electrical power in Sweden. The combination of intense radiation fluxes and high temperatures in nuclear reactors creates an extraordinary environment. Therefore, a number of material challenges arise at a nuclear power plant that needs to be solved in order to maintain the nuclear power production, safety and reliability. Dissimilar metal welds can be found at a lot of places in nuclear power plants and due to reparations or replacement some dissimilar metal welds need to be welded on site. The technical regulation

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16

Wang, Tianhao. "Friction Stir Welding of Dissimilar Metals." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1404577/.

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Dissimilar metals joining have been used in many industry fields for various applications due to their technique and beneficial advantages, such as aluminum-steel and magnesium-steel joints for reducing automobile weight, aluminum-copper joint for reducing material cost in electrical components, steel-copper joints for usage in nuclear power plant, etc. The challenges in achieving dissimilar joints are as below. (1) Big difference in physical properties such as melting point and coefficient of thermal expansion led to residual stress and defects. (2) The miscibility issues resulted in either b

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17

Ratanathavorn, Wallop. "Development and evaluation of hybrid joining for metals to polymers using friction stir welding." Licentiate thesis, KTH, Industriell produktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173232.

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Combinations of different materials are increasingly used in the modern engineering structures. The driving forces of this trend are rising fuel costs, global warming, customer demands and strict emission standards. Engineers and industries are forced to improve fuel economy and cut emissions by introducing newly design engines and lightweighting of structural components. The use of lightweight materials in the structures has proved successful to solve these problems in many industries especially automobile and aerospace. However, industry still lacks knowledge how to manufacture components fr

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18

Soundararajan, Vijay. "Thermo-mechanical and microstructural issues in joining similar and dissimilar metals by friction stir welding." Ann Arbor, Mich. : ProQuest, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3245931.

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Thesis (Ph.D. in Mechanical Engineering)--S.M.U., 2007.<br>Title from PDF title page (viewed Mar. 18, 2008). Source: Dissertation Abstracts International, Volume: 67-12, Section: B, page: 7339. Adviser: Radovan Kovacevic. Includes bibliographical references.

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19

Lu, Ying. "Resistance and Ultrasonic Spot Welding of Light-Weight Metals." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1533730654738672.

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20

Atwood, Lorne Steele. "Friction Bit Joining of Dissimilar Combinations of GADP 1180 Steel and AA 7085 – T76 Aluminum." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6400.

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Friction Bit Joining (FBJ) is a method used to join lightweight metals to advanced high-strength steels (AHSS). The automotive industry is experiencing pressure to improve fuel efficiency in their vehicles. The use of AHSS and aluminum will reduce vehicle weight which will assist in reducing fuel consumption. Previous research achieved joint strengths well above that which was required in three out of the four standard joint strength tests using DP980 AHSS and 7075 aluminum. The joints were mechanically tested and passed the lap-shear tension, cross-tension, and fatigue cycling tests. The t-pe

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21

Squires, Lile P. "Friction Bit Joining of Dissimilar Combinations of Advanced High-Strength Steel and Aluminum Alloys." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4104.

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Friction bit joining (FBJ) is a new method that enables lightweight metal to be joined to advanced high-strength steels. Weight reduction through the use of advanced high-strength materials is necessary in the automotive industry, as well as other markets, where weight savings are increasingly emphasized in pursuit of fuel efficiency. The purpose of this research is twofold: (1) to understand the influence that process parameters such as bit design, material type and machine commands have on the consistency and strength of friction bit joints in dissimilar metal alloys; and (2) to pioneer mach

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22

Weickum, Britney. "Friction Bit Joining of 5754 Aluminum to DP980 Ultra-High Strength Steel: A Feasibility Study." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2789.

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In this study, the dissimilar metals 5754 aluminum and DP980 ultra-high strength steel were joined using the friction bit joining (FBJ) process. The friction bits were made using one of three steels: 4140, 4340, or H13. Experiments were performed in lap shear, T-peel, and cross tension configurations, with the 0.070" thick 5754 aluminum alloy as the top layer through which the friction bit cut, and the 0.065" thick DP980 as the bottom layer to which the friction bit welded. All experiments were performed using a computer controlled welding machine that was purpose-built and provided by MegaSti

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23

Henon-Vernet, Christine. "Contribution à l'étude métallurgique d'une liaison bimétallique soudée 16MND5/309/308." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0021.

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Les liaisons bimetalliques soudees concernees par cette etude interessent les assemblages par soudage des tubulures de cuve en acier faiblement allie 16mnd5 et des tuyauteries en acier austenitique 316 du circuit rep. Certaines de ces liaisons presentent en peau externe des defauts intergranulaires en premiere couche de beurrage qui n'apparaissent que lorsque la structure de cette premiere couche est purement austenitique. Les materiaux assembles ayant des coefficients de dilatation tres differents, nous avons suppose que la fatigue thermique pouvait etre responsable de la presence de ces defa

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24

Bhat, K. Udaya. "Studies On Dissimilar Metal Welding." Thesis, 2008. http://hdl.handle.net/2005/786.

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The area of research dealing with joining of dissimilar metals has been active in recent time. Although fusion and non-fusion techniques of joining have been effectively used for manufacturing components, a comprehensive scientific understanding of the process is lacking. This void exists both in fusion and non-fusion welding methods. The present investigation addresses some of these aspects. The investigation consists of two sections - Part A and Part B. Part A is on Friction welding and Part B deals with Fusion welding using laser. Each section has two chapters each. Following an introdu

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25

Tang, Zih-yong, and 唐自勇. "The Study of Dissimilar Metal Welding and Post-Welding." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/65599259365328199292.

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碩士<br>國立交通大學<br>機械工程學系<br>99<br>The article was investigated on the A2024 and A7050 dissimilar welding and it’s mechanical properties for post-weld heat treatment process. In this experiment, tungsten inert gas (TIG) welding process was utilized to make weldments with filler metals of ER2319 and ER5356. The effect of heat treatment of natural aging (T1), solution treatment(T4), and solution treatment plus artificial aging(T6) on the weldment were investigated. The tensile test, microhardness test, and optical microscope were used to study the mechanical properties and microstructures the eff

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26

Huang, Hung-Chau, and 黃鋐洲. "Characteristics of Dissimilar Metal Joints by Resistance Projection Welding." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/rf9s2r.

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碩士<br>國立虎尾科技大學<br>材料科學與綠色能源工程研究所<br>99<br>In this study, austenitic stainless steel (SUS 304), ferrite stainless steel (SUS 430) and Kovar alloy sheets were resistance projection welded as lap joints. The process parameters were steel sheet combination in joints and test some important parameters as electrode material, charging voltage, operating pressure and projection height; on the nugget area and maximum tensile force of the welded joint were experimentally investigated. The results showed that increasing charging voltage increased heat input and therefore weld nugget growth. Also, high co

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27

Tsung-HsuanTsai and 蔡宗軒. "Design Analysis of Co-rotating Mechanism by Dissimilar Metal Screws Welding." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/zumt94.

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28

Jiang, Cong-Zheng, and 江聰政. "The study of friction stir welding in Cu/Al dissimilar metal." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/99907355698295917544.

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碩士<br>國立中興大學<br>材料工程學系所<br>94<br>Copper alloy and Aluminum alloy are usually used in heat exchanger or heat sink. So, how to combine this two dissimilar metals join together has become a serious problem. Because those two metals have different fused junction characters, usually use solid phase process to join them together. For example, friction welding, explosion welding, supersonic frequency welding, brazing and soldering. But they also have some limitations, like friction welding and explosion welding have geometry limits, brazing and soldering used only particular materials. But friction s

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29

Weng, San-Feng, and 翁三峰. "Studies on the Friction Stir Spot Welding of Dissimilar Metal Multilayer Sheets." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/wc9f8q.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>107<br>The four metal sheets are spot lap welded using a fixed-load friction stir welding machine and an assembly embedded rod tool without the probe, where the shoulder is a tungsten carbide ring and the SS400 low carbon steel rod is embedded in its center. The four metal sheets are SS400 low carbon steel, C1100 pure copper, G3302 SGHC galvanized steel and AA6061-T6 aluminum alloy, where the aluminum alloy sheet has a thickness of 5 mm and the remaining sheet thickness is 2 mm. There are two types of sheets arranged in sequence, where the first kind is low carb

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30

JING, HUNG YUAN, and 洪源璟. "Residual stress distribution after Overlay weld with Gas Tungsten Arc Welding of Dissimilar Metal." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/8m2247.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>106<br>This research involved weldment of dissimilar A508 low alloy steel and 316L stainless steel for base metal. The welding of dissimilar parts was conducted by use of gas tungsten arc welding (GTAW) and gas metal arc-welding (GMAW) techniques with nickel-based 82/182 alloys used as filler metal for butt joint and butter layer while inconel alloy 52M used for cladding. Observation of microstructure changes within the weldment and its were conducted for different settings of welding parameters and processes. The X-ray diffraction method was used to detect and analy

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Tsai, Yao-Long, and 蔡曜隆. "The Study on Welding Temperature and Residual Stress of S15C/SUS304 Dissimilar Metal Butt Joint." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/78217246054432536247.

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博士<br>國立交通大學<br>機械工程學系<br>98<br>This study explored the difference in the distribution of the temperature and residual stresses of both the similar and dissimilar weld metal joints. Autogenous GTA welding process was conducted on stainless steel 304 and structural steels S15C. The hole-drilling method was used to experimentally measure the residual stress. The thermo-elastic-plastic theory was employed in the finite element model with temperature dependent material properties. The results showed that using 54% thermal efficiency of GTA welding can accurately simulate the welding temperature di

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32

Jin-Yuan, Wun, and 溫晉源. "Study on the Characteristics of Hot Cracking and Dissimilar Metal Welding on 2024 Aluminum Alloys." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/22727966929897842739.

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碩士<br>國立臺灣師範大學<br>機電科技研究所<br>98<br>The main purpose of this study focuses on 2024 aluminum alloys. it includes two parts: The first part aims to investigate the hot cracking susceptibility of 2024 aluminum alloys. The specimens were experimented with tungsten Inert gas welding (TIG) at first under the condition of no filler metal used. Then, the spot varestraint testing was used to evaluate the effect resulting from the times of thermal cycles and augment strain over hot cracking susceptibility of 2024-T351 and 2024-T6 aluminum alloys. Meanwhile, the causes and patterns of hot cracking wer

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33

Pereira, Diogo Jorge de Oliveira Andrade. "Developments in Magnetic Pulse Welding." Doctoral thesis, 2018. http://hdl.handle.net/10362/45649.

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Magnetic Pulse Welding is a solid state joining technology based on impact, which allows to produce overlap joints both in planar and tubular geometries. The technology has seen an increased interest in recent years, especially as a result of the industrial need to joint dissimilar materials (metallic and non-metallic) which easily form brittle intermetallic phases when welded by fusion-based processes. However, no significant improvements on existing equipments have been reported, which are normally sized for endurance, compromising the machine efficiency. In fact these are normally equipped

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34

Chatterjee, Subhradeep. "Microstructure Development During Laser And Electron Beam Welding Of Ti/Ni Dissimilar Joints." Thesis, 2006. http://hdl.handle.net/2005/601.

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Fusion welding of dissimilar metals constitutes a crucial processing stage in a variety of applications, and the use of high energy beams (HEB) like lasers and electron beams for such welding applications has several advantages, such as, precision, narrow heat affected zone, and consequently, low distortion. An understanding of microstructural evolution in the weld is a prerequisite for producing sound joints with desired properties. HEB welding of similar metals have been studied extensively. In contrast, fewer studies have been directed toward understanding the fundamental aspects of solidif

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35

Pan, Sheng-Fu, and 潘聖富. "The Study of Dissimilar Metal Welding of Multi-component High-entropy Alloys with Stainless Steel 304." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/87578823487268508054.

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碩士<br>國立交通大學<br>機械工程系所<br>93<br>The development of High-Entropy alloys has aroused considerable interest recently. Many investigations have been conducted on the microstructures, mechanical properties, corrosion resistance, heat treatment, thin film development, and phase identifications. These newly developed alloys have good corrosion and wear resistance, high-temperature mechanical properties, and specially physical and chemical properties with nanostructure. This experimental research project aimed at the investigation of weldability testing and microstructure analysis of Gas Tungsten Arc

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36

Wang, Shing-Hae, and 王星海. "Study on Welding Characteristics and Microstructuresof processing Multi-steps Dissimilar Metal Welding forFE-510 Low Alloy High Strength Steel and Nickel-baseAlloy 625." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/3w6t34.

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碩士<br>崑山科技大學<br>機械工程研究所<br>96<br>This study use FE-510 high strength low alloy （HSLA）steel as pressure container base metal, and use Inconel 625 nickel-base alloy as material of working liquid、cable or related device, we combine each other by the way of SMAW ; In addition, it’s necessary to do different metal dissimilar cutting-welding process repeatedly due to the limitation of working environment, lifetime, production cost and component real operating condition. This study is necessary because of cutting-welding repeated process is influenced by the input heat and influence base metal. This

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37

Fan, Pao-lung, and 范寶龍. "Experiments of Friction Stir Welding of Dissimilar Metals." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/656y7x.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>95<br>In this paper, Friction Stir Welding(FSW) experiments are conducted using similar and dissimilar metals of 6061-T6 Aluminum alloy, AZ-31 Magnesium alloy, JISC-1100 pure copper as specimens. Thermalcouples of type D are used to measure temperature history at different postions of workpiece duing Fsw. Form the temperature history, the preheating temperature and the tool rotation and tool moving speed can be found for a successful welding process. The experimental results show that the temperature ranges for the tool starting to move after preheating are 250-

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38

Ye, Jine-wei, and 葉建偉. "Optimizating Resistance Spot Welding Parameters for Dissimilar Metals Joints." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/umzbk3.

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碩士<br>國立虎尾科技大學<br>材料科學與綠色能源工程研究所<br>102<br>The main purpose of this study is use duplex stainless steel (SAF 2507) and nickel-base superalloys (Inconel 600) to find the optimizing the quality in DC power supply for resistance spot welding. the chrome zirconium copper alloy for the electrode tip material plane electrode, and shear strength as a quality spot welding pieces of property evaluation, in order to obtain the most efficient process of this good parameter values, this study Taguchi method (Taguchi Method), with the impact of the four factors that control the charging voltage、welding tim

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Kuo, Kuo Yang, and 郭養國. "Experimental Measurements of Metals Processing (1)Electron Beam Welding Dissimilar Metals." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/06889753126094200757.

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40

Jiang, Shiau-Jiun, and 江曉均. "Microstructural Evaluation and Welding Reliability of Friction Stir Welding Al and Cu Dissimilar Metals." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/rksqs9.

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碩士<br>國立虎尾科技大學<br>材料科學與綠色能源工程研究所<br>102<br>Wrought aluminum (Al) and Cu alloys are generally used by welding with structural homogeneous or dissimilar joints for the engineering applications. However, high temperature of the traditional fusion welding will reduce the weldability and the joining strength of Al/Cu joints. Thus, the development of friction stir welding (FSW) of dissimilar metals, which has energy consumption, eco-friendly and simple welding process, has been focused by many researchers. The aim of the present study is to join the dissimilar Al and Cu alloys by the FSW technique.

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41

Huang, Sin-Yi, and 黃心怡. "Optimization study on Cu-Fe dissimilar metals in DC Resistance Spot Welding." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/evcat5.

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碩士<br>國立臺北科技大學<br>工業工程與管理研究所<br>98<br>This research is about the optimization study on Cu-Fe dissimilar metals in DC Resistance Spot Welding. In this study, 100 mm × 25 mm × 1t mm material of iron (JIS-G3141 SPCE) and copper (JIS-C1100) for resistance spot welding processes, use DC power supplies for resistance spot welding. Electrode materials were for the molybdenum and chromium copper alloy plane electrode. Study of three influencing control factors: welding current, welding time and the electrode force of the welding results. Finally, Used Tensile-shear test to assessed differences of Ten

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42

Yen, Chi-Ying, and 閻其暘. "Study of Friction Welding of Dissimilar Metals by High Frequency Induction Heating." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/4u3s3v.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>106<br>In this study, Friction Welding experiment of Dissimilar metals of 10mm diameter AISI 1045 carbon steel and SUS 304 stainless steel by high frequency induction Heating was carried out .In addition a finite element analysis software DEFORM is used to analyze the welding temperature under various forming condition such as in different coil types of double-twisted solenoid、 triple-twisted concentric and U-type and coil offset position of 0、1、 2、 3、4、5 mm .A better coil position offset for a better finished product during the experiment. The mechanical proper

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Huang, Jhih-Ren, and 黃志仁. "Investigation of Microstructure and Mechanical Properties of Micro-Tungsten Inert Gas Welding on Dissimilar Metals between Beryllium Copper Alloy and Ferritic Stainless Steel." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/suszza.

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碩士<br>國立虎尾科技大學<br>材料科學與工程系材料科學與綠色能源工程碩士班<br>105<br>In this paper, beryllium copper alloy and ferritic stainless steel were welded by micro-gas tungsten arc welding. The working ranges of welding parameters were fixed by conducting trial runs and satisfactory results obtained were used to conduct an experimental study. Experiments were conducted applying ultrasonic vibration during the arc welding process and their effects on microstructure and mechanical properties of welds were presented. The observations of microstructure revealed that Fe-Cu compound in the weld metal was confirmed and no

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Martins, Flávio Gonçalves. "Determinação da velocidade de placas metálicas aceleradas por explosivo." Master's thesis, 2017. http://hdl.handle.net/10316/83396.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia<br>Este projeto tem como objetivo avaliar em termos numéricos, para configurações planas, a evolução da velocidade da placa voadora em função da espessura do explosivo e da espessura da placa voadora. A aceleração da placa voadora foi estudada para uma configuração lateral e frontal à onda de detonação. O software de simulação numérica utilizado foi LS-DYNA 2D, um código de elementos finitos, Lagrangeano, que permite a análise da resposta dinâmicas em sólidos bidimensionais. O modelo par

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