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Articoli di riviste sul tema "Dissimilaire"

Autore: Grafiati

Pubblicato: 25 gennaio 2025

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1

Lima, Luciana Iglésias Lourenço, Guilherme Marconi Silva, Angel Raphael Arce Chilque, Mônica Maria de Abreu Mendonça Schvartzman, Alexandre Queiroz Bracarense e Marco Antônio Dutra Quinan. "Caracterização microestrutural de soldas dissimilares dos aços ASTM A-508 e AISI 316L". Soldagem & Inspeção 15, n. 2 (giugno 2010): 112–20. http://dx.doi.org/10.1590/s0104-92242010000200005.

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As soldas dissimilares (dissimilar metal welds - DMWs) são utilizadas em diversos segmentos da indústria. No caso específico de usinas nucleares, tais soldas são necessárias para conectar tubulações de aço inoxidável com componentes fabricados em aços baixa liga. Os materiais de adição mais utilizados neste tipo de solda são as ligas de níquel 82 e 182. Este trabalho consistiu na soldagem de uma junta dissimilar de aço baixa liga ASTM A-508 G3 e aço inoxidável austenítico AISI 316L utilizando as ligas de níquel 82 e 182 como metais de adição. A soldagem foi realizada manualmente empregando os processos de soldagem ao arco SMAW (Shielded Metal Arc Welding) e GTAW (Gas Tungsten Arc Welding). Os corpos de prova foram caracterizados microestruturalmente utilizando-se microscópio óptico e microscópio eletrônico de varredura com microanálise por dispersão de energia de raios X (EDS) e ensaios de microdureza Vickers. Observou-se uma microestrutura constituída de dendritas de austenita com a presença de precipitados com formas e dimensões definidas pelo aporte térmico e pela direção de soldagem. Não houve variação significativa da dureza ao longo da junta soldada, demonstrando a adequação dos parâmetros de soldagem utilizados.

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2

Benevides, Aline de Lima. "O processamento lexical do acento em pseudopalavras a partir da leitura de falantes do português brasileiro". Filologia e Linguística Portuguesa 26, n. 2 (31 dicembre 2024): 241–59. https://doi.org/10.11606/issn.2176-9419.v26i2p241-259.

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Este trabalho investigou, a partir de um estudo experimental, o papel da similaridade fonológica, da frequência de ocorrência da palavra base e da sílaba final na atribuição do acento primário em pseudopalavras a partir da produção de falantes nativos do português brasileiro. A métrica de criação das pseudopalavras baseou-se no estudo de Protopapas et al. (2006). As palavras a partir das quais as pseudopalavras foram criadas tinham alta ou baixa frequência de ocorrência, três sílabas de extensão. Contrastaram-se quatro grupos experimentais: i. similar de alta frequência; ii. dissimilar de alta frequência; iii. similar de baixa frequência; e iv. dissimilar de baixa frequência. Hipotetizou-se que pseudopalavras similares de alta frequência desencadeassem mais processos analógicos do que pseudopalavras dissimilares. Participaram do estudo 34 falantes, em uma tarefa de leitura. Os resultados demonstraram que a semelhança entre palavras reais e pseudopalavras desencadeia processos analógicos com a extensão do padrão acentual e que a frequência de ocorrência da palavra alvo e a sílaba final também são relevantes. Tais resultados trazem indícios de que o acento é armazenado juntamente com a palavra (isto é, é lexical) e de que os níveis segmental, silábico e acentual interagem na determinação do local em que o acento incide.

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Maksymova, S. V., P. V. Kovalchuk e V. V. Voronov. "Vacuum brazing of kovar–molybdenum dissimilar joints". Paton Welding Journal 2021, n. 7 (28 luglio 2021): 13–18. http://dx.doi.org/10.37434/tpwj2021.07.03.

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4

Grühn, Monika. "Hahnemann's Dissimilar Diseases". Homoeopathic Links 24, n. 04 (dicembre 2011): 226–31. http://dx.doi.org/10.1055/s-0031-1280285.

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5

Carlone, Pierpaolo, e Antonello Astarita. "Dissimilar Metal Welding". Metals 9, n. 11 (9 novembre 2019): 1206. http://dx.doi.org/10.3390/met9111206.

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The combination of distinct materials provides intriguing opportunities in modern industry applications, whereas the driving concept is to design parts with the right material in the right place [...]

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Lomholt, Michael A., Ludvig Lizana e Tobias Ambjörnsson. "Dissimilar bouncy walkers". Journal of Chemical Physics 134, n. 4 (28 gennaio 2011): 045101. http://dx.doi.org/10.1063/1.3526941.

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7

O’Donnell, Jacqueline, e Charles Fisch. "Dissimilar atrial rhythm". ACC Current Journal Review 8, n. 3 (maggio 1999): 63–65. http://dx.doi.org/10.1016/s1062-1458(99)00015-x.

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8

Sethi, Ankur, e Rutash Mittal. "Comparative Evaluation of Mechanical Characterization Features of Dissimilar Weldments". International Journal of Trend in Scientific Research and Development Volume-2, Issue-3 (30 aprile 2018): 1823–26. http://dx.doi.org/10.31142/ijtsrd11530.

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9

Ashok Kumar, R., e M. R. Thansekhar. "Wear Behaviour of Friction Stir Welded Dissimilar Aluminium Alloys". METALLOFIZIKA I NOVEISHIE TEKHNOLOGII 41, n. 2 (27 marzo 2019): 203–11. http://dx.doi.org/10.15407/mfint.41.02.0203.

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10

Vijaya Sankar, B., I. Daniel Lawrence e S. Jayabal. "Prediction of Spot Welding Parameters for Dissimilar Weld Joints". Bonfring International Journal of Industrial Engineering and Management Science 6, n. 4 (31 ottobre 2016): 123–27. http://dx.doi.org/10.9756/bijiems.7542.

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11

Loureiro, Altino J. R. "Soldadura de aços dissimilares". Metálica, n. 53 (7 maggio 2019): 32–35. http://dx.doi.org/10.30779/cmm_metalica_53_04.

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12

Allewell, Norma. "Evolving to dissimilate hydrocarbons". Trends in Biochemical Sciences 14, n. 11 (novembre 1989): 473–74. http://dx.doi.org/10.1016/0968-0004(89)90124-2.

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13

Guo, Jingfeng, Wenwen Liu, Chunxiu Li e Xiaoming Zhang. "Microstructural characterization and mechanical behavior of Cr25Ni35NbM alloy dissimilar weld joint for application in a hydrogen reformer furnace". Metallurgical Research & Technology 117, n. 6 (2020): 612. http://dx.doi.org/10.1051/metal/2020067.

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The microstructural characterization and mechanical behavior of Cr25Ni35NbM/15CrMo and Cr25Ni35NbM/SUS321 dissimilar weld joints were studied in this paper. The microstructure, room temperature and high temperature (1173 K) tensile strength of dissimilar weld joints were analyzed through optical microscopy (OM), scanning electron microscopy (SEM) and electronic universal tensile testing machine. The microstructure of HAZ in 15CrMo steel of Cr25Ni35NbM/15CrMo dissimilar weld joint transformed from ferrite-pearlite into ferrite-martensite. A large volume fraction of α phase was found to have precipitated in the HAZ of SUS321 austenitic stainless steel for Cr25Ni35NbM/SUS321 dissimilar weld joint. At room temperature, the tensile strength and yield strength of these two type dissimilar weld joints is less than Cr25Ni35NbM alloy similar weld joint. The high temperature tensile strength of these two type dissimilar weld joints is less than Cr25Ni35NbM alloy similar weld joint. Both at room and high temperature, the fracture locations of two types dissimilar weld joints are the HAZ of the base metal 15CrMo and SUS321 stainless steel, respectively. It indicates that the weak part of the Cr25Ni35NbM alloy dissimilar weld joints is the low-performance base metals 15CrMo and SUS321 stainless steel.

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14

Kuo, Chil-Chyuan, Jing-Yan Xu e Chong-Hao Lee. "Weld Strength of Friction Welding of Dissimilar Polymer Rods Fabricated by Fused Deposition Modeling". Polymers 14, n. 13 (25 giugno 2022): 2582. http://dx.doi.org/10.3390/polym14132582.

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Friction welding (FRW) is a promising method for joining cylindrical components of dissimilar and similar polymers or metals. In particular, FRW is capable of generating defect-free welds. Fused deposition modeling (FDM) has been widely employed in the automotive industry, ranging from lightweight tools, testing models, and functional parts. Conventionally, dissimilar parts fabricated by FDM are joined by glue. However, distinct disadvantages of this approach include both low joining strength and low joining efficiency. Hitherto, little has been reported on the characterizations of weld strength of FRW of dissimilar parts fabricated by FDM. In addition, FRW of dissimilar polymeric materials is a difficult task because different polymers have different physical, rheological, and mechanical properties. In this study, the effects of welding revolution on the weld strength of friction welding dissimilar parts fabricated by FDM are investigated experimentally. It was found that the average flexural strength of dissimilar polymer rods fabricated by FRW is about 1.52 times that of dissimilar polymer rods fabricated by gluing. The highest flexure strength can be obtained by FRW using polylactic acid (PLA) and PC (polycarbonate) rods. The average impact strength of dissimilar polymer rods fabricated by FRW is about 1.04 times that of dissimilar polymer rods joined by gluing. The highest impact strength can be obtained by FRW using PLA to PLA rods.

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15

Siddhu, Vikash, Naveen Kumar e Dr Navneet Arora. "Investigation on Dissimilar Metal Welds by Resistance Spot Welding Process". International Journal of Trend in Scientific Research and Development Volume-2, Issue-3 (30 aprile 2018): 65–72. http://dx.doi.org/10.31142/ijtsrd10805.

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16

Maksymova, S. V., V. V. Voronov, P. V. Kovalchuk e A. V. Larionov. "Producing dissimilar joints of molybdenum–stainless steel using vacuum brazing". Paton Welding Journal 2017, n. 2 (28 febbraio 2017): 13–18. http://dx.doi.org/10.15407/tpwj2017.02.03.

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17

Sonam, Rajan Vohra e Ravinder Singh Sawhney. "Dynamic Routing Protocols Analysis based on Dissimilar Number of Packets". SIJ Transactions on Computer Networks & Communication Engineering 02, n. 03 (23 giugno 2014): 01–06. http://dx.doi.org/10.9756/sijcnce/v2i3/0203100101.

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18

Pandya, S. N., e J. V. Menghani. "Friction Stir Welding of Dissimilar 5xxx to 6xxx Al Alloys: A Review". Applied Mechanics and Materials 376 (agosto 2013): 42–48. http://dx.doi.org/10.4028/www.scientific.net/amm.376.42.

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Many engineering applications in aerospace and automotive field require joining of dissimilar 5xxx to 6xxx Al alloys. Dissimilar Al alloy joints are used for industrial applications due to technical & economic reasons. However, due to different metallurgical behaviour & mechanical properties, joining of dissimilar Al alloys presents a number of challenges. Due to high temperature generation most of the fusion welding techniques are not suitable. In addition, other pressure welding techniques such as – Ultrasonic welding, Roll bonding, Diffusion bonding and Friction welding have some limitation. Hence, friction stir welding (FSW) can be considered to be the most suitable method to join dissimilar Al alloys due to solid-state nature of the process. Since invention, friction stir welding has been a matter of research and investigation for years. In its history of two decades, Friction Stir welding was investigated for joining dissimilar Al alloys during the last decade. Most of studies demonstrated that good quality joints between dissimilar Al alloys can be produced by the Friction Stir Welding (FSW) process. The present study is a chronological & critical review of recent studies on joining of dissimilar 5xxx to 6xxx Al alloys by friction stir welding.

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19

Bezerra, Ewertton de Souza, Cristiano Dall’ Agnol, Lucas Bet da Rosa Orssatto, Thiago Cesar Martins, Roberto Simão, Fábio Yuzo Nakamura e Antônio Renato Pereira Moro. "Dissimilar responses of autonomic function and strength to different periodizations in aging adults/ Respostas dissimilares da função autônoma e força para diferentes periodizações em adultos idosos". Brazilian Journal of Development 7, n. 4 (3 aprile 2021): 33949–66. http://dx.doi.org/10.34117/bjdv7n4-040.

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Diferentes tipos de programas de treinamento resistido resultam em diferente estresse metabólico e demandas cardiovasculares, o que poderia influenciar adaptações na modulação autonômica cardíaca. O estímulo preciso do treinamento resistido e os mecanismos responsáveis por promover a melhora na variabilidade da frequência cardíaca (VFC) não são claros. Para examinar os efeitos na VFC após dois modelos de periodização de treinamento resistido em adultos idosos. Vinte e dois sujeitos foram divididos em dois grupos: periodização de sessão mista (MSP, n = 11) e periodização tradicional (TP, n = 11). Os sujeitos foram testados antes e após 24 sessões de treinamento resistido para VFC (tempo, frequência e análise não linear), cinco repetições máximas (5-RM) para o leg press e flexora senatada. Apenas o TP melhorou a VFC. O RR médio possivelmente aumentou com prováveis melhorias em RMSSD, SD1 e APEN. Muito provavelmente mudanças positivas foram observadas em HF. As diferenças foram associadas a tamanhos de efeito variando de 0,16 a 0,69. Para todos esses parâmetros autonômicos cardíacos no grupo MSP, a magnitude das mudanças foi classificada como trivial. A abordagem MSP resultou em prováveis ajustes autonômicos inferiores em RR, HF, RMSSD, HF, SD1 e APEN médios. Ambos os grupos provavelmente aumentaram o desempenho de força no leg press e na flexora sentada com possivelmente e provavelmente maiores melhorias observadas no grupo MSP, respectivamente. Aumentos graduais na intensidade prescrita pela abordagem TP podem fornecer melhores ajustes autonômicos do que as intensidades repentinamente mais altas sugeridas pelo MSP. TP parece ser mais eficaz para melhorias da função autonômica, enquanto MSP para força em adultos idosos.

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20

Wang, Qiuying, Hui Chen, Zongtao Zhu e Yunlong Cui. "Mechanical properties of a dissimilar aluminum alloy joint welded by hybrid laser–MIG welding". International Journal of Modern Physics B 31, n. 16-19 (26 luglio 2017): 1744037. http://dx.doi.org/10.1142/s0217979217440374.

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Two dissimilar Al alloys, 5083-H111 and 6005A-T6, were joined by hybrid laser–MIG welding method. Mechanical properties of the welded joint were investigated and compared. The results show that the tensile strength of the dissimilar joint is 219.8 MPa, 11.7% higher than that of 6005A-T5 joint. After statistical analysis of the fatigue data, the [Formula: see text]–[Formula: see text]–[Formula: see text] curves of the dissimilar joint were obtained. The mean fatigue strength at [Formula: see text] of the dissimilar joint is 112.5 MPa. The fatigue strength at [Formula: see text] of the dissimilar joint for a given 10% probability of failure, at a confidence level of 95%, is 101.4 MPa. The fatigue strength at [Formula: see text] of the dissimilar joint is almost same as that of the 6005A-T6 joint. In welded structure designing, different [Formula: see text]–[Formula: see text]–[Formula: see text] curves should be chosen according to the different service conditions and reliability requirements.

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21

Ju, Yeong Jo, e Euy Sik Jeon. "Topology Optimization of Seat Cushion Frame With Dissimilar Materials for Lightweight Strength Optimization". International Journal of Manufacturing, Materials, and Mechanical Engineering 9, n. 1 (gennaio 2019): 1–12. http://dx.doi.org/10.4018/ijmmme.2019010101.

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A method for lightweight strength optimization when using dissimilar materials is proposed by applying topology optimization and a design-of-experiment (DOE) to a seat-cushion frame with typical steel. Static analysis of the seat-cushion frame was performed by applying the appropriate safety standards for each passenger. The authors performed topology optimization of the seat-cushion, which was subjected to static analysis and confirmed that the method can be applied to dissimilar materials according to their density ratio as well as the strength of the cushion frame, which was made with dissimilar materials. The strength of the cushion frame made of dissimilar materials is improved compared to the seat-cushion frame made of typical steel. It was also confirmed that the application ratio of the dissimilar materials and the optimization of the application ratio of a dissimilar ratio and the thickness of each material using the DOE can improve the strength of the cushion frame and reduce the weight.

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22

Loureiro, Altino J. R. "Welding of dissimilar steels". Metálica, n. mi11 (17 dicembre 2019): 32–35. http://dx.doi.org/10.30779/cmm_metalica_mi11_04.

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Fuchs, Russel, Herbert Heuser e Bernd Hahn. "Welding of dissimilar materials". Materials at High Temperatures 27, n. 3 (settembre 2010): 183–90. http://dx.doi.org/10.3184/096034010x12813771363483.

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24

Pool, R. "Similar Experiments, Dissimilar Results". Science 242, n. 4876 (14 ottobre 1988): 192–93. http://dx.doi.org/10.1126/science.242.4876.192.

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25

Palmstrom, C. J. "Epitaxy of Dissimilar Materials". Annual Review of Materials Science 25, n. 1 (agosto 1995): 389–415. http://dx.doi.org/10.1146/annurev.ms.25.080195.002133.

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26

Turna, M., P. Kopca e B. Trefilova. "CO2laser welding dissimilar steels". Welding International 3, n. 2 (gennaio 1989): 173–77. http://dx.doi.org/10.1080/09507118909447640.

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Akgün, Vedat, Erhan Erkut e Rajan Batta. "On finding dissimilar paths". European Journal of Operational Research 121, n. 2 (marzo 2000): 232–46. http://dx.doi.org/10.1016/s0377-2217(99)00214-3.

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Galvez, Jorge, Maria Galvez-Llompart, Riccardo Zanni e Ramon Garcia-Domenech. "Molecular topology – dissimilar similarities". Drug Discovery Today: Technologies 10, n. 4 (dicembre 2013): e475-e481. http://dx.doi.org/10.1016/j.ddtec.2013.05.001.

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Martinsen, K., S. J. Hu e B. E. Carlson. "Joining of dissimilar materials". CIRP Annals 64, n. 2 (2015): 679–99. http://dx.doi.org/10.1016/j.cirp.2015.05.006.

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Constantino, Miguel, M. Cândida Mourão e Leonor S. Pinto. "Dissimilar arc routing problems". Networks 70, n. 3 (21 agosto 2017): 233–45. http://dx.doi.org/10.1002/net.21763.

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Braga, Daniel F. O., Lucas Azevedo, G. Cipriano e Pedro M. G. P. Moreira. "Structural Integrity of Dissimilar Materials and Dissimilar Additive Manufacturing Processes: A Review". Procedia Structural Integrity 54 (2024): 631–37. http://dx.doi.org/10.1016/j.prostr.2024.01.128.

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Lee, Seung Hwan. "A Hot Cracking on Dissimilar Metal Weld between A106Gr.B and A312 TP316L with Buttering ERNiCr-3". Metals 9, n. 5 (8 maggio 2019): 533. http://dx.doi.org/10.3390/met9050533.

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When designing piping systems for various industrial facilities, carbon steel and stainless steel are widely being used. In order to satisfy design requirements in the piping systems, the two different materials are often welded in various cases. Therefore, for quality assurance, it is necessary to understand mechanical and metallurgical properties of dissimilar metal welds thoroughly. In this study, dissimilar metal welds of stainless and carbon steels were produced through the gas tungsten arc welding (GTAW) process. In the middle of the dissimilar weld, buttering welding and butt welding were manufactured using filler wires of ERNiCr-3 and ER316L. The chemical composition of the dissimilar metal weld was analyzed. Tensile test, bending test, and hardness test were additionally performed. The microstructures of the dissimilar metal weld were investigated to analyze the cracks found during the tensile test and the bending test. The metallographic behavior was analyzed in the vicinity of the cracks. The mechanism and cause of the cracks in the dissimilar metal weld were identified. As a result, the precipitates of complex carbide types were observed in segregation bands.

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Venukumar, S., Muralimohan Cheepu, T. Vijaya Babu e D. Venkateswarlu. "Cold Metal Transfer (CMT) Welding of Dissimilar Materials: An Overview". Materials Science Forum 969 (agosto 2019): 685–90. http://dx.doi.org/10.4028/www.scientific.net/msf.969.685.

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In recent years, the continuous growth in manufacturing industries such as light weight structures, demands in increasing of its performance and functionality enhance the use of different materials for producing hybrid structures and thus the requirements for joining of dissimilar joints. The physical and metallurgical properties of the materials are utilised to get combined properties to achieve the product performance. On the other hand the joining methods are continuously challenging for joining of dissimilar materials. The present study reviews and describes the effective welding method of cold metal transfer for joining of dissimilar materials and its state of the art research in various materials joining. Cold metal transfer joining mechanism, capabilities of joining of dissimilar metals and their performance are reviewed. The current and emerging techniques of cold metal transfer welding method are reviewed. Methods and other technological parameters selection are described and future challenges for improving research methods on joining of dissimilar metals using cold metal transfer. Keywords: Cold Metal Transfer, MIG welding, Dissimilar materials, Mechanical properties.

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Yang, Hong, Nian Suo Xie e Qiang Liu. "Study on the Welding Process and Application of Al/Cu Materials". Advanced Materials Research 800 (settembre 2013): 290–93. http://dx.doi.org/10.4028/www.scientific.net/amr.800.290.

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The characteristics of welding process for aluminum-copper dissimilar material such as friction welding, explosive welding, brazing and cold pressure welding are discussed firstly in this paper. Then the welding technology and its application for aluminum-copper dissimilar material are summarized. Finally, the outlook is analyzed for the welding process of aluminum-copper dissimilar material.

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Manuel, Neves, Daniel Beltrão, Ivan Galvão, Rui M. Leal, José D. Costa e Altino Loureiro. "Influence of Tool Geometry and Process Parameters on Torque, Temperature, and Quality of Friction Stir Welds in Dissimilar Al Alloys". Materials 14, n. 20 (13 ottobre 2021): 6020. http://dx.doi.org/10.3390/ma14206020.

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In the current investigation, the influence of the tool geometry, the position of the materials in the joint, the welding speed on the temperature and torque developed, and on the quality of the welds in dissimilar and tri-dissimilar T joints were analysed. The aluminium alloys used were AA2017-T4, AA6082-T6, and AA5083-H111 and the friction stir welds were performed with identical shoulder tools, but with either a pin with simple geometry or a pin with progressive geometry. Progressive pin tools proved to be a viable alternative in the production of dissimilar and tri-dissimilar welds, as they provide a larger tool/material friction area and a larger volume of dragged material, which promotes an increase in the heat generated and a good mixing of the materials in the stir zone, although they require a higher torque. Placing a stronger material on the advancing side also results in a higher temperature in the stir zone but requires higher torque too. The combination of these factors showed that tools with a progressive pin provide sound dissimilar and tri-dissimilar welds, unlike single-pin tools. The increase in the welding speed causes the formation of defects in the stir zone, even in tri-dissimilar welds carried out with a tool with a progressive pin, which impairs the fatigue strength of the welds.

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Chen, Hu, e Jin Dan Zhu. "Creep Life Prediction of T91/12Cr1MoV Dissimilar Welded Joint". Applied Mechanics and Materials 330 (giugno 2013): 304–9. http://dx.doi.org/10.4028/www.scientific.net/amm.330.304.

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Based on the creep test results of T91/12Cr1MoV dissimilar welded joint at different conditions, the creep curves of this dissimilar welded joint were established by modified θ projection concept. Low stress creep life was predicted by this curve and the established creep curve shows a good agreement with the experimental data. For computation, Larson-Miller parameters method was also used in creep life forecasting of T91/12Cr1MoV dissimilar welded joint. The resu lt showed that the modified θ projection concept was more accurately in predicting the creep life than Larson-Miller parameters method in allusion to T91/12Cr1MoV dissimilar welded joint.

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Shuo, Wang, Wei Limin, Cheng Yi e Tan Shuping. "Post-weld Heat Treatment and Groove Angles Affect the Mechanical Properties of T92/Super 304H Dissimilar Steel Weld Joints". High Temperature Materials and Processes 37, n. 7 (26 luglio 2018): 649–54. http://dx.doi.org/10.1515/htmp-2016-0261.

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AbstractThe microstructures and mechanical properties of dissimilar weld joints between T92 and Super 304H steels were investigated. Dissimilar weld joints with four groove angles were constructed using gas tungsten arc welding. The results showed that post-weld heat treatment improved the mechanical properties of the dissimilar weld joints. The optimal groove angle for T92/Super 304H dissimilar weld joints was found to be 20°, considering mechanical properties. Furthermore, the transformation from equiaxed dendrites to columnar dendrites was observed in the weld metal. Epitaxial growth and delta ferrites were found around the fusion line between the Super 304H and the weld metal.

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Zhang, Guo Dong, e Chang Yu Zhou. "Numerical Simulation of Welding Residual Stress and Post-Weld Heat Treatment for Dissimilar Steel Welded Joint". Materials Science Forum 575-578 (aprile 2008): 747–52. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.747.

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By the finite element analysis software ABAQUS and the function of coupling process between heat and stress, the welding residual stress of Cr5Mo and 20 steel joint was analyzed. In addition the heat treatment of dissimilar steel welded joint was simulated. The residual stress distributions of dissimilar steel welding and heat treatment after welding were obtained. The comparison of welding residual stress between the homogenous steel and dissimilar steel was carried out. The results indicate that the welding residual stress of the same steel is lower than that of dissimilar steel welded joint obviously. Because of the difference of thermal expansion coefficient for base metal and welding microstructure, the relatively higher residual stress is produced due to the bigger thermal expansion coefficient of base metal. The highest annular residual stress is in welding line root of internal wall, while the highest axial residual stress is in welding line surface of outer wall. The welding residual stress of dissimilar welded joint is reduced obviously after heat treatment. The research results provide the possibility for optimizing the welding procedure and improving the reliability of dissimilar steel welding joint.

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39

Patel, Naimesh, J. B. Rami, A. P. Vora, C. P. Dewan e D. Subrahmanyam. "Thermo-Elastic Design of Flexure for Spaceborn Opto-Mechanical Payloads". Applied Mechanics and Materials 110-116 (ottobre 2011): 5292–300. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.5292.

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Spaceborn optical payload consists of optical elements supported by mechanical structure in desired orientation. Mechanical structure made up of various dissimilar materials like aluminum & invar possess dissimilar thermo-elastic behavior. Opto-mechanical assembly subjected to temperature change will results to change in optical element orientation which ultimately leads to change in optical parameters like registration. This is mainly due to dissimilar materials subjected to temperature variation will result to structural distortion. Use of dissimilar materials in an Opto- mechanical payload affects the angular stability of optical element due to temperature variation and results to change in optical element orientation. Flexure is required to be introduced within the opto-mechanical system having dissimilar materials to accommodate differential thermal expansion due to temperature variation and to maintain the registration. This paper explains, stability in dichroic element orientation of an opto-mechanical payload having dissimilar material & flexure design to maintain the orientation in opto-mechanical payload subjected to temperature variation without deterioration of fundamental frequency. It also explains theoretical thermo-elastic analysis and experimental test for validation of design, static and dynamic structural analysis like frequency response analysis to check the flexure survivability for vibration load.

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40

Hwang, Jeong, Ju Lee, Hafiz Ahmad, Seung Ha, Dong Bae e Henok Kebede. "Assessing Corrosion Fatigue Characteristics of Dissimilar Material Weld between Alloy617 and 12Cr Steel Using Buttering Welding Technique". Metals 8, n. 10 (15 ottobre 2018): 826. http://dx.doi.org/10.3390/met8100826.

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In this study, dissimilar material welding between Alloy617 and 12Cr steel was performed using the buttering welding technique on the 12Cr steel side in order to increase the weldability. After multi-pass welding, post weld heat treatment (PWHT) was performed in order to reduce the welding residual stresses, and metallurgical microstructures were observed on dissimilar material weld. Additionally, the corrosion fatigue crack growth characteristics of dissimilar material weld was assessed according to Fracture Mechanics. Based on the results, the fatigue and corrosion fatigue strength of dissimilar material weld between Alloy617 and 12Cr steel did not show a big difference prior to and after post weld heat treatment. Fatigue and corrosion fatigue crack growth of dissimilar material weld were slightly faster than those of similar material weld of Alloy617. However, the characteristics of fatigue and corrosion fatigue crack growth did not show a big difference prior to and after PWHT.

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41

He, Xiaohui, Bin Liu, Xiong Zhou, Cheng Li, Xuhui Zhang e Junjie Chang. "Research status and prospect of dissimilar light alloy welding technology". MATEC Web of Conferences 358 (2022): 01052. http://dx.doi.org/10.1051/matecconf/202235801052.

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Magnesium alloys, aluminum alloys and titanium alloys are currently widely used light alloy materials with good prospects. The welding of Mg/Al/Ti dissimilar light alloys has a wide range of application requirements in aerospace, automobile manufacturing, electronic information and other fields, and is a hot topic of current research. This article summarizes the welding research results of Mg/Al/Ti dissimilar light alloys in recent years, outlines the current research status of welding technology of Mg/Al/Ti dissimilar light alloys, analyzes the common problems and solutions in welding, and proposes further Carry out the research of Mg/Al/Ti welding technology and basic theory, look forward to the effective ways to improve the welding performance of Mg/Al/Ti dissimilar light alloys and future research directions, and promote the promotion of Mg/Al/Ti dissimilar light alloy joints The practicality of it is of great significance.

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42

Somadder, Somnath. "Thermo-mechanical stress analysis of dissimilar material joints using FEM". Journal of Mechanical and Energy Engineering 4, n. 2 (24 novembre 2020): 147–54. http://dx.doi.org/10.30464/jmee.2020.4.2.147.

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Abstract: This article presents numerical investigation of isotropic dissimilar material joints. Dissimilar material joints are broadly used in in various structures, including offshore, nuclear, electronic packaging, IC chip and spacecraft various fields of science and technology. In bi-material joints two different material are bonded with common interface region. High stress concentration occur at the interface of the joint under thermo-mechanical loadings due to the difference in the elastic properties and the thermal expansion coefficients of dissimilar materials. The stresses acting along the interface of dissimilar material joints are very important to determine whether the structure is reliable or not for operation. The main purpose of this research is to provide finite element solutions to predict the stress distribution at the interface of the joint based on the theory of elasticity. Keywords: Numerical Investigation, Dissimilar material joints, Stress concentration, Stress distributions, Theory of elasticity.

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43

Hussein, N. I. S., M. N. Ayof e S. Nordin. "Tensile Strength of Orbital Welded Mild Steel Tubes with Dissimilar Thickness". International Journal of Materials, Mechanics and Manufacturing 4, n. 1 (2015): 56–59. http://dx.doi.org/10.7763/ijmmm.2016.v4.225.

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44

TAKAYA, Shunsuke, Motomichi YAMAMOTO, Kenji SHINOZAKI, Hiroshi MATSUDA e Rinsei IKEDA. "Hot-wire Laser Brazing Technology for Steel / Aluminum Alloy Dissimilar Joint". QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 35, n. 2 (2017): 155s—159s. http://dx.doi.org/10.2207/qjjws.35.155s.

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45

Reddy, M. S. Amarnath, Mr J. Sree Hari e Mr K. Sai Kiran. "Optimization of Process Parameters in MIG Welding of Two Dissimilar Materials". International Journal of Trend in Scientific Research and Development Volume-2, Issue-6 (31 ottobre 2018): 992–97. http://dx.doi.org/10.31142/ijtsrd18749.

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46

Azaron, Amir, Hideki Katagiri, Kosuke Kato e Masatoshi Sakawa. "RELIABILITY EVALUATION AND OPTIMIZATION OF DISSIMILAR-COMPONENT COLD-STANDBY REDUNDANT SYSTEMS". Journal of the Operations Research Society of Japan 48, n. 1 (2005): 71–88. http://dx.doi.org/10.15807/jorsj.48.71.

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47

Elagin, V. P. "Selection of shielding gas for mechanized arc welding of dissimilar steels". Paton Welding Journal 2014, n. 6 (28 giugno 2014): 110–14. http://dx.doi.org/10.15407/tpwj2014.06.24.

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48

Farazila, Y., Y. Miyashita, Y. Mutoh e Y. Otsuka. "809 Laser spot welding of dissimilar materials between PET and metals". Proceedings of Conference of Hokuriku-Shinetsu Branch 2010.47 (2010): 285–86. http://dx.doi.org/10.1299/jsmehs.2010.47.285.

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49

P Deluao, Ronelia, e Joe Vincent B Deluao. "Task Cards Instruction and Skill in Adding and Subtracting Dissimilar Fractions". International Journal of Scientific Engineering and Research 6, n. 11 (27 novembre 2018): 106–8. https://doi.org/10.70729/ijser18387.

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50

Ahmadvand, Seyedsaied, Mohammadreza Elahifard, Bijan Peik, Reza Behjatmanesh-Ardakani, Behrooz Abbasi e Bahman Abbasi. "Predictive Modeling of Corrosion in Al/Mg Dissimilar Joint". ChemEngineering 3, n. 3 (5 agosto 2019): 70. http://dx.doi.org/10.3390/chemengineering3030070.

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In the absence of any abnormality (standard conditions), the gradient of any mechanical/thermodynamic stress would be intensified at the dissimilar joint due to an abrupt change in the chemical composition. This paper aims to investigate the effect of delocalizing this stress by imposing an optimum chemical gradient within the dissimilar joint. In this work, we computationally demonstrated that a homogenous distribution of magnesium atoms in the aluminum (100) structure with a specific chemical gradient could potentially reduce the susceptibility of the Mg/Al dissimilar joint towards micro-galvanic corrosion. This is achieved through the minimization of the work function gradient within the dissimilar joint.

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