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Relevant bibliographies by topics / Friction welding. Steel, Stainless Microstructure / Dissertations / Theses

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Dissertations / Theses on the topic 'Friction welding. Steel, Stainless Microstructure'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Failla, David Michael II. "Friction Stir Welding and Microstructure Simulation of HSLA-65 and Austenitic Stainless Steel." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243969697.

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2

Sterling, Colin J. "Effects of Friction Stir Processing on the Microstructure and Mechanical Properties of Fusion Welded 304L Stainless Steel." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd440.pdf.

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3

Caetano, Gerbson de Queiroz. "Joining of similar ferritic and austenitic stainless steels by the "friction stir welding" process." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=17229.

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This study aimed to investigate the similar welding of several ferritic and austenitic stainless steels (AISI 304L, AISI 316L, AISI 410S and AISI 444) by the friction stir welding process (FSW), evaluating operational and metallurgical aspects to produce joints without defects. The FSW welding of four materials in this study was performed at the Helmholtz-Zentrum Geesthacht (Germany) due to the establishment of a cooperation agreement with the Universidade Federal do CearÃ. The welding parameters range were based on papers found in literature, for the other kinds of stainless steel, different

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4

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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5

Lu, Jian. "Microstructure Evolution in 304L Stainless Steel Subjected to Hot Torsion at Elevated Temperature." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2854.

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The current study focus on investigating a relationship between processing variables and microstructure evolution mechanism in 304L stainless steel subjected to hot torsion. The Gleeble 3800 with Mobile Torsion Unit (MTU) is utilized in the current study to conduct hot torsion test of 304L stainless steel. Samples are rotated at 1100℃ in the shear strain rate range of 0.02s-1 to 4.70s-1 and the shear strain range of 0.5 to 4. Orientation imaging microscopy (OIM) technique is used to collect and analyze the microstructure. At low strains (≤1) and strain rate (0.02s-1), average grain size remain

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LEITE, ANTONIO M. dos S. "Investigação da resistência à corrosão por pites do aço inoxidável duplex tipo 2404 (UNS S82441) submetido à soldagem por atrito com pino não-consumível (FSW)." reponame:Repositório Institucional do IPEN, 2017. http://repositorio.ipen.br:8080/xmlui/handle/123456789/28016.

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Submitted by Pedro Silva Filho (pfsilva@ipen.br) on 2017-11-17T16:32:32Z No. of bitstreams: 0<br>Made available in DSpace on 2017-11-17T16:32:32Z (GMT). No. of bitstreams: 0<br>Os aços inoxidáveis duplex são largamente utilizados na fabricação de equipamentos para a indústria de óleo e gás, utilizados tanto no ambiente onshore quanto offshore. Sua grande limitação é que, com o aumento de temperatura, ocorre precipitação de fases indesejáveis, que reduzem drasticamente a resistência à corrosão e as propriedades mecânicas desses materiais. Considerando o efeito deletério da soldagem a fusão nos

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7

Owen, Charles Blake. "Two Dimensional Friction Stir Welding Model with Experimental Validation." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1200.pdf.

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8

Stratton, Daryl A. "Characterizing the Frictional Interface in Friction Stir Welding." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1757.pdf.

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9

Martins, Jorge Miguel Ribeiro. "Joining copper to stainless steel by friction stir diffusion process." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10723.

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Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do Grau de Mestre em Engenharia Mecânica<br>One of the major trends in welding and joining technology is to join dissimilar materials taking advantage of individual materials properties. Among these, copper to stainless steel joining has significant industrial applications and importance where e.g. the highest electrical and thermal conductivities are required to engineering materials associated to good corrosion resistance. However, joining these materials is difficult due to their ve

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10

Ray, Lara L. "Friction stir welding of HT9 ferritic-martensitic steel: an assessment of microstructure and properties." Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/34726.

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Approved for public release; distribution is unlimited<br>This thesis explores the processing-microstructure-property relationships in friction stir welded (FSW) HT9A ferritic-martensitic steel. HT9 has previously been studied as a structural component for fusion/fission based reactors; however, the changes in material microstructure and properties after friction stir welding have not been considered. HT9A steel plate was friction stir welded with a series of increasing heat inputs. The microstructure of this welded material was characterized using optical and electron microscopy. The mechanic

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11

Pessoa, AntÃnio Rodolfo Paulino. "Welding on UNS S32750 superduplex stainless steel plates employed FCAW process." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14415.

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AgÃncia Nacional do PetrÃleo<br>Superduplex stainless steels (SDSS) may be defined as a family of steels having a two-phase ferritic-austenitic microstructure and the good mechanical properties and high corrosion resistance of this alloy are attributed to this microestrutural balance. These excellent qualities attribute to SDSS great employability in the oil sector, where manufacturing and equipment maintenance are performed by welding, which if not executed properly, can have a negative effect on the metallurgical properties and this problem becomes more critical in multipass welding due to r

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12

Hosseini, Vahid. "Influence of multiple welding cycles on microstructure and corrosion resistance of a super duplex stainless steel." Licentiate thesis, Högskolan Väst, Avdelningen för svetsteknologi (SV), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-10151.

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Super duplex stainless steel (SDSS) has found a wide use in demanding applications such as offshore, chemical and petrochemical industries thanks to its excellent combination of mechanical properties and corrosion resistance. Welding of SDSS, however, is associated with the risk of precipitation of secondary phases and formation of excessive amounts of ferrite in the weld metal and heat affected zone. The present study was therefore aimed at gaining knowledge about the effect of multiple welding thermal cycles on the microstructure and possible sensitization to corrosion of welds in SDSS.Contr

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13

Gygi, Cameron Scott. "Crack Healing in 304L Stainless Steel Using Additive Manufacturing and Friction Stir Processing (FSP)." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6530.

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Continuing an investigation on using FSP to heal stress corrosion cracks (SCC) in welds on nuclear reactors, this study seeks to use AM in addition to FSP to aid crack repair. Previous studies address that current repair technology on nuclear reactors involves the use of TIG welding which can allow helium atoms to aggregate and form voids at the grain boundaries. This weakens the material and renders the repair ineffective. Another previous study evaluated the effectiveness of FSP alone in repairing SCC which did have defects depending on the parameters used during FSP. This study evaluated th

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14

Hochanadel, Joris Erich. "Effect of Beam Characteristics and Process Parameters on the Penetration and Microstructure of Laser and Electron Beam Welds in Stainless Steel and Titanium." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu160503470688313.

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15

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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16

Furse, Devin Donaldson. "Optimization and Correlation of the Penn State Model of Friction Stir Welding to Experimental Welds in 304L Stainless Steel." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2524.

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A numerical model of friction stir welding developed by T. DebRoy, R. Nandan, and others has been optimized to fit experimental data of eleven welds of 304L stainless steel at various weld feed rates and spindle speeds. Optimization was used to determine the values of five difficult-to-measure model parameters. The optimal parameter values were then correlated to the weld machine inputs. The mechanical efficiency and the coefficient of friction were not correlated with feed rate, spindle speed, or axial pressure. Tool slip was positively correlated with feed rate, negatively correlated with sp

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17

Bertilsson, Anders. "Alternative welding methods for nitrogen alloyed steel." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-62142.

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This project explores the feasibility of the solid-state welding method direct-drive friction welding to be used as a joining method for the nitrogen alloyed steel Uddeholm Vanax SuperClean, produced via processes based on powder metallurgy. Vanax SuperClean cannot be welded using fusion welding methods where the base material melts, due to nitrogen escaping the material, resulting in inferior quality welds. The cost of the material motivates the use of Vanax SuperClean for critical parts in applications, combined with a less costly material for the remaining parts, causing alternative joining

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18

Mathis, Tyler Alan. "Predicting Hardness of Friction Stir Processed 304L Stainless Steel using a Finite Element Model and a Random Forest Algorithm." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7591.

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Friction stir welding is an advanced welding process that is being investigated for use in many different industries. One area that has been investigated for its application is in healing critical nuclear reactor components that are developing cracks. However, friction stir welding is a complicated process and it is difficult to predict what the final properties of a set of welding parameters will be. This thesis sets forth a method using finite element analysis and a random forest model to accurately predict hardness in the welding nugget after processing. The finite element analysis code use

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19

Westin, Elin M. "Microstructure and properties of welds in the lean duplex stainless steel LDX 2101." Doctoral thesis, KTH, Metallografi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-27387.

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Duplex stainless steels can be very attractive alternatives to austenitic grades due to their almost double strength at equal pitting corrosion resistance. When welding, the duplex alloys normally require addition of filler metal, while the commodity austenitic grades can often be welded autogenously. Over-alloyed consumables are used to counteract segregation of important alloying elements and to balance the two phases, ferrite and austenite, in the duplex weld metal. This work focuses on the weldability of the recently-developed lean duplex stainless steel LDX 2101® (EN 1.4162, UNS S32101).

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20

Silva, Julio Cezar Barcellos da. "Análise do ciclo térmico da soldagem por atrito com pino consumível do aço inoxidável superduplex ASTM A890 grade 6A." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-15012018-154156/.

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Esta tese analisa o ciclo térmico da soldagem por atrito de um aço inoxidável superduplex ASTM A890 - 6A. Esse aço foi unido pelo processo de soldagem com pino consumível em furo cônico não-passante (Friction Tapered Stud Welding - FTSW) e a análise teve como objetivo principal a elaboração de um modelo matemático por meio da definição de alguns elementos do ciclo térmico de soldagem em três diferentes pontos das juntas. Os parâmetros analisados foram a rotação, a força axial e o deslocamento do pino. As equações dos ciclos térmicos foram elaboradas pelas relações existentes entre os parâmetro

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21

Tinubu, Olusegun Olukunle. "Effect of Friction-stir Processing on the Wear Behavior of Titanium (Ti-1Al-8V-5Fe) and Stainless Steel (A-286) Alloys." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc801955/.

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The effect of friction stir processing (FSP) on the mechanical wear behavior was investigated for Ti-1Al-8V-5Fe (Ti-185) and stainless steel (Incoloy® A-286) alloys. The Ti-185 and A-286 alloys were tested in different processing conditions, including as rolled (AR), AR+FSP, and AR+FSP+aged. A high frequency reciprocating rig was used to simulate fretting-type wear of these alloys at room temperature. The Vickers micro-hardness and wear rates were calculated and compared for each processing condition. It was determined that along with increasing hardness in the stir zones, FSP resulted in imp

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22

Tolunguc, Burcu. "Microstructural And Mechanical Characterization Of Duplex Stainless Steel Grade 2205 Joined By Hybrid Plasma And Gas Metal Arc Welding." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614001/index.pdf.

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In the present study, the applicability of the hybrid plasma arc welding, in which a keyhole is responsible of deep penetration and a filler wire electrode supplies a high deposition rate, was examined. The microstructural evolutions in grade 2205 duplex stainless steel plates joined by keyhole and melt-in techniques were investigated. The specimens obtained from welded plates having thickness of 8 mm were examined via optical and scanning electron microscopy. Metallographic investigations were supported by X-ray diffraction and energy dispersed spectra analyses by characterizing the phases fo

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23

Santos, Julianne Ribeiro dos. "Influence of heat imput in multipass welding na corrosion resistence of UNS S32760 superduplex stainless steel welded pipe joints by GMAW process." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13611.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>O objetivo do presente trabalho Ã estudar o efeito da energia de soldagem sobre as transformaÃÃes microestruturais e a resistÃncia Ã corrosÃo na soldagem multipasse do aÃo inoxidÃvel superduplex UNS S32760 pelo processo MIG/MAG. A fim de atingir este objetivo, foram produzidas juntas soldadas variando-se a energia de soldagem nos seguintes nÃveis: 0,5 kJ/mm, 1,0 kJ/mm e 2,0 kJ/mm. Os valores de energia foram baseados em registros de qualificaÃÃo de procedimento de soldagem (RQPS) elaborados e aplicados nas unidades da PETROBRAS, exc

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24

Sprengard, Benjamin A. "Effect of Nitrogen Concentration in Shielding Gas on Microstructure and Mechanical Properties of ATI 2003® Lean Duplex Stainless Steel Autogenous Plasma Arc Welding." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1313773905.

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25

Gunter, Cameron Cornelius. "Feasibility of Friction Stir Processing (FSP) as a Method of Healing Cracks in Irradiated 304L Stainless Steels." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6111.

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The current US fleet of nuclear reactors has been in service for three decades. Over this period, existing welds in stainless steel (SS) shrouds have sustained stress corrosion cracking (SCC) and are in need of repair. Additionally, helium has formed interstitially as a byproduct of proton bombardment. Current repair technology, such as TIG welding, puts extreme amounts of heat into the material and allows for interstitial helium atoms to aggregate and form bubbles/voids at grain boundaries. This significantly weakens the material, proving to be a very counterproductive and ineffective repair

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26

Westin, Elin M. "Welds in the lean duplex stainless steel LDX 2101 : effect of microstructure and weld oxide on corrosion properties." Licentiate thesis, KTH, Materials Science and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9299.

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<p>Duplex stainless steels are a very attractive alternative to austenitic grades due to their higher strength and good corrosion performance. The austenitic grades can often be welded autogenously, while the duplex grades normally require addition of filler metal. This is to counteract segregation of important alloying elements and to give sufficient austenite formation to prevent precipitation of chromium nitrides that could have a negative effect on impact toughness and pitting resistance. The corrosion performance of the recently-developed lean duplex stainless steel LDX 2101 is higher tha

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27

Westin, Elin M. "Welds in the lean duplex stainless steel LDX 2101 : effect of microstructure and weld oxides on corrosion properties." Licentiate thesis, Stockholm : Industriell teknik och management, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9299.

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28

Machado, Rodrigo Batista. "Efeitos do processo de soldagem por fricção com pino consumível sobre a microestrutura de um aço inoxidável dúplex UNS S31803." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/149806.

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Os aços inoxidáveis dúplex compõem uma família de materiais conhecidos por apresentar uma excelente combinação propriedades mecânicas e de corrosão, e por isso têm sido amplamente estudados nos últimos anos. Contudo, essa combinação de propriedades está intrinsecamente relacionada com a microestrutura desses aços, composta por iguais quantidades de ferrita e austenita, e esse equilíbrio entre as fases é extremamente dependente dos ciclos térmicos aos quais são submetidos, sob risco, inclusive, da precipitação de fases secundárias deletérias. Sendo assim, a soldagem desses materiais exige uma s

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Nunes, Everton Barbosa. "âPROPRIEDADES MECÃNICAS E CARACTERIZAÃÃO MICROESTRUTURAL NA SOLDAGEM DO AÃO INOXIDÃVEL DUPLEX UNS S31803 (SAF 2205)â." Universidade Federal do CearÃ, 2009. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=3918.

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AgÃncia Nacional do PetrÃleo<br>FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico<br>Os aÃos inoxidÃveis duplex possuem boas propriedades mecÃnicas e excelente resistÃncia Ã corrosÃo, aumentando seu uso em ambientes agressivos. Estas caracterÃsticas os fazem muito utilizados principalmente na indÃstria quÃmica e petroquÃmica. Geralmente, a fabricaÃÃo e reparo destes equipamentos envolvem operaÃÃes de soldagem, sendo que Ã muito importante avaliar a influÃncia dos parÃmetros de soldagem multipasse no balanceamento de fases, na microestrutura e microdureza. Primeiramente, fo

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30

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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31

Leite, Antonio Marcos dos Santos. "Investigação da resistência à corrosão por pites do aço inoxidável duplex tipo 2404 (UNS S82441) submetido à soldagem por atrito com pino não-consumível (FSW)." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-06092017-095305/.

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Os aços inoxidáveis duplex são largamente utilizados na fabricação de equipamentos para a indústria de óleo e gás, utilizados tanto no ambiente onshore quanto offshore. Sua grande limitação é que, com o aumento de temperatura, ocorre precipitação de fases indesejáveis, que reduzem drasticamente a resistência à corrosão e as propriedades mecânicas desses materiais. Considerando o efeito deletério da soldagem a fusão nos aços inoxidáveis duplex, a soldagem por atrito com pino não-consumível (FSW) é amplamente considerada como alternativa aos processos convencionais. Como no FSW a união dos mater

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32

Escobar, Atehortua Julian David 1988. "Transformações de fase associadas ao processamento termomecânico do aço inoxidável supermartensítico 12Cr/6Ni/2Mo/0,1Ti." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263100.

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Orientadores: Paulo Roberto Mei, Antonio Jose Ramirez<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-23T10:44:00Z (GMT). No. of bitstreams: 1 EscobarAtehortua_JulianDavid_M.pdf: 12651878 bytes, checksum: f83be91a80d6364b37f33a45ae5d0539 (MD5) Previous issue date: 2013<br>Resumo: Neste trabalho foram estudadas as modificações metalúrgicas provocadas por tratamentos térmicos e soldagem por atrito com pino não consumível SAPNC do aço inoxidável supermartensítico AISM 12Cr/6Ni/2Mo/0,1Ti. As chapas de AISM for

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Lesage, Thibault. "Grippage des aciers inoxydables : influence de la nature des matériaux, de la microstructure et des traitements thermochimiques de surface." Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2486/document.

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Le grippage dans le cas des aciers inoxydables est un phénomène complexe nécessitant une approche multi-échelle et multi-physique. Les 6 nuances d’aciers inoxydables sélectionnées au cours de cette thèse (316L, 316LN, Nitronic60, AISI660, Uranus45N et 17-4PH) ont été étudiées à l’état de réception et après traitements thermochimique de surface de type S3P. Ces matériaux ont subi un essai de grippage selon la norme ASTM G98 et les échantillons qui en résultent ont été caractérisés selon une approche d’abord surfacique (évolution de la morphologie de la surface, observations MEB…) puis en volume

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Thomä, Marco. "Wirkung von Leistungsultraschall auf das Prozessverhalten und die Bindungsmechanismen beim Rührreibschweißen von Aluminium/Stahl-Verbunden." Technische Universität Chemnitz, 2021. https://monarch.qucosa.de/id/qucosa%3A74493.

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Das ultraschallunterstützte Rührreibschweißen (USE-FSW) als innovatives Hybrid-Pressschweißverfahren zeichnet sich durch eine Reihe von Vorteilen aus, welche es für die Kombination artfremder metallischer Werkstoffe mit deutlich unterschiedlichem Schmelzpunkt ermöglichen, qualitativ hochwertigere Verbunde zu realisieren. Die vorliegende Arbeit thematisiert experimentelle Untersuchungen der Auswirkungen des zusätzlich eingekoppelten Leistungsultraschalls auf das Prozessverhalten und die Bindungsmechanismen sowie daraus resultierender mechanischer Verbundeigenschaften beim ultraschallunterstützt

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Chen, Ying-Ju, and 陳盈如. "Corrosion Behavior of Dissimilar Friction Stir Welding between 316L Stainless Steel and Inconel 600." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/37031818532759715232.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>104<br>The effect of welding parameters (travel speed) on the corrosion behaviour of dissimilar friction stir welds in the 316 L stainless steel and Inconel 600 was investigated. It was found that travel speed is related with location of corrosion attack and mechanical properties. Hardness of each zone was examined by Vickers hardness method. DL-EPR (double-loop electrochemical potential reactivation test) was applied to evaluate electrochemical polarization characteristics of each zone. SEM and EDS were used to analyzed surface and precipitations of test specimen.

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YI, HSU WEN, and 許文益. "Evaluation of the Mechanical Properties of Stainless Steel (SUS630) and Alloy Steel (SCM415) Joined by Friction Welding." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/71954245663764097258.

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碩士<br>中州技術學院<br>工程技術研究所<br>97<br>The aim of this study is to investigate experimentally the micro-structural properties and welding strengths of the joints using stainless steel (SUS630) and alloy steel (SCM415) parts. The experiments were carried out using a beforehand designed and constructed experimental friction welding set-up, constructed as continuous-drive. Firstly, pilot welding experiments under different friction time and friction pressure were carried out to obtain optimum parameters using statistical approach. Later, the strengths of the joints were determined by tensile and hard

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Chang, Yao-Chi, and 張堯棊. "A study on the joining properties of ductile iron and stainless steel by friction stir spot welding." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/74094370478053361566.

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碩士<br>國立臺灣師範大學<br>工業教育學系<br>100<br>Friction stir spot welding is another solid-statebonding technique deri- ved from friction stir welding, the process temperature which is below the melting point of the base material can be avoided defects resulting from melting, it is suitable for joining dissimilar materials and difficu- lt materials. Ductile iron has been widely used in many engineering structures, due to excellent mechanical properties, good casting and low-cost. Ferrite stainless steels have been used in some severe corrosion environment for its corrosion resistance which is mo- re super

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Nguyen, Van Nhat, and 阮文一. "Study on the Welding Features of the Weld Joint betweenAluminum Alloy to Stainless Steel and Aluminum Alloy to DualPhase Steel by Using TIG and Friction Stir Welding." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ehrwq7.

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博士<br>國立高雄科技大學<br>機械工程系<br>107<br>Due to the advantages such as light weight, corrosion resistance and high oxidation resistance, the connection between aluminum alloys and stainless steel,aluminum alloys and dual phase steel has used more widely in industrial applications. However, to weld the metal together, there are still many challenges. Such as, the melting point of steel is much larger than that of aluminum, the difference in mechanical properties and chemical composition. Especially at the interface between the stainless steel and weld seam easily form an intermetallic compound (IMC) l

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Simões, Bernardo João Ribeiro. "Microstructure and Mechanical properties in Cu-17Al-11.4Mn shape memory alloys laser welded to 316L stainless steel." Master's thesis, 2021. http://hdl.handle.net/10362/121788.

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It is well known that NiTi alloys are the most widely used shape memory alloys nowadays, with a large number of possible applications, such as in the aerospace, auto motive, medical and civil industries. This large versatility makes them a very difficult alloy to replace. However, there is a group of shape memory alloys which has been receiving ev ermore attention as a candidate to replace NiTi alloys, with many of the same applica tions. These are the Cu-Al-Mn alloys, a lightweight group of alloys recognized for their large versatility and lower cost, while managing to achieve the same or e

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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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