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You searched for subject:(Welding Parameters Optimization). Showing records 1 – 2 of 2 total matches.

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Indian Institute of Science

1. Kumar, K. Studies On Friction Stir Welding Of Precipitation Hardenable Aluminium Alloys.

Degree: 2009, Indian Institute of Science

Friction Stir Welding (FSW) is an emerging solid state welding process. It has been a proven method for welding high strength aluminium alloys which were previously not recommended for conventional fusion welding. Since the invention of the process by The Welding Institute, United Kingdom, in 1991, a number of studies have been conducted on the material flow, microstructural evolution and mechanical properties of friction stir welds. However, there is not enough conceptual background available on FSW process for physical understanding of the mechanism of weld formation. In addition to that, FSW welds of high strength precipitation hardenable aluminium alloys suffer from reduced joint efficiency due to overaging in the heat affected zone. In the present investigation, experimental analysis has been carried out to understand the mechanism of weld formation and parameter optimization for aluminium alloys 7020-T6 and 6061-T6. For this purpose the investigations have been made on both the process aspects and the material aspects. The process aspects are analyzed with the objective of learning the mechanism to produce defect free welds. For this purpose experiments have been carried out to analyze the effect of FSW parameters, material flow and the frictional characteristics between the tool and base metal. Preliminary experiments are conducted on aluminium alloy 7020-T6 with different tool geometries to analyze the interaction of the tool with the base metal using a knee-type vertical milling machine. Then, the tool geometry which produced defect-free weld is used for further experimentation. The role of tool pin, shoulder and axial load on the formation of defect free weld is analyzed in an innovative experiment, where the tool and base metal interaction is continuously increased by continuously increasing the interference between the tool and base metal. In another experiment the initial abutting interface position with respect to the tool is continuously varied to study the interaction of the tool with the initial interface and to find the positional information where the initial interface is completely eliminated. Further, the tool metal interface condition is studied using a specially designed tribological experiment which simulates the FSW condition. From the base metal point of view, due to the strain, strain rate and temperature imposed on the base metal during the process, the microstructure is altered. In precipitation hardenable aluminium alloys the strengthening precipitates are dissolved or overaged in the weld region depending on the peak temperature in the region, which reduces the joint efficiency. However, the dissolution and overaging are kinetic process. In order to analyze this time dependant softening behavior of the base metal 7020-T6 and 6061-T6, isothermal annealing and differential scanning calorimetric studies are performed. In order to obtain FSW welds with maximum joint efficiency, the welding temperature should not exceed the “softening temperature” of the base metal. But, to produce… Advisors/Committee Members: Kailas, Satish V.

Subjects/Keywords: Welding; Aluminium Alloys; Friction Stir Welding (FSW); Weld Formation; Welding Parameters - Optimization; 7020-T6; 6061-T6; Materials Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Kumar, K. (2009). Studies On Friction Stir Welding Of Precipitation Hardenable Aluminium Alloys. (Thesis). Indian Institute of Science. Retrieved from http://hdl.handle.net/2005/720

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Kumar, K. “Studies On Friction Stir Welding Of Precipitation Hardenable Aluminium Alloys.” 2009. Thesis, Indian Institute of Science. Accessed January 19, 2020. http://hdl.handle.net/2005/720.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Kumar, K. “Studies On Friction Stir Welding Of Precipitation Hardenable Aluminium Alloys.” 2009. Web. 19 Jan 2020.

Vancouver:

Kumar K. Studies On Friction Stir Welding Of Precipitation Hardenable Aluminium Alloys. [Internet] [Thesis]. Indian Institute of Science; 2009. [cited 2020 Jan 19]. Available from: http://hdl.handle.net/2005/720.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kumar K. Studies On Friction Stir Welding Of Precipitation Hardenable Aluminium Alloys. [Thesis]. Indian Institute of Science; 2009. Available from: http://hdl.handle.net/2005/720

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Marcelo Niehues Schlickmann. Avaliação da influência dos parâmetros do processo de soldagem TIG sobre a qualidade de uma peça fabricada em aço elétrico silicioso.

Degree: 2010, Universidade do Estado de Santa Catarina

O processo de soldagem TIG (Tungsten Inert Gas), também conhecido como GTAW (Gas Tungsten Arc Welding), é o processo mais utilizado para a soldagem de chapas finas onde um excelente controle do aporte térmico à peça é necessário. Nesta dissertação é presentado um estudo realizado em parceria entre o Departamento de Pós-Graduação em Ciência e engenharia dos Materiais e os Departamentos de Engenharia Industrial e Estamparia da WEG Equipamentos Elétricos S.A. - Motores. Esse estudo envolveu a utilização da metodologia de delineamento experimental DOE para investigar a influência dos parâmetros do processo de soldagem TIG, corrente elétrica, velocidade de deslocamento da tocha e vazão do gás de proteção, na qualidade de uma peça fabricada com aço elétrico silicioso ABNT 50F 466M, mais conhecido pela classificação 50A 400 da norma JIS. Inicialmente foi elaborado o planejamento do experimento a fim de obter peças soldadas com diferentes combinações dos parâmetros acima mencionados e possibilitar a avaliação da resistência mecânica, dimensão dos cordões de solda, dureza e análise metalográfica dos corpos de prova. Os resultados obtidos, com o auxílio da técnica de análise de variância (ANOVA), mostraram que mudanças nos níveis de corrente e na velocidade de soldagem promoveram alterações significativas nos resultados. Por outro lado, as diferentes taxas de vazão de gás testadas não provocaram diferenças nas variáveis de resposta do estudo. Também foi possível determinar as combinações desses parâmetros que garantem a qualidade requerida e proporcionam aumento de produtividade, economia de energia elétrica e redução no consumo de gás de proteção.

The TIG welding process (Tungsten Inert Gas), also known as GTAW (Gas Tungsten ArcWelding), is the most commonly used process for welding of thin plates where there is a need for an excellent control of the temperature applied on the piece. This paper presents a study carried out in partnership between the Department of Graduate Studies in Scienceand Materials Engineering and the Department of Industrial Engineering and Stamping of WEG Equipamentos Elétricos S.A Motors Division. It elaborates on the use of the experimental methodology DOE to investigate the influence of TIG welding process parameters, electrical current, welding speed and flow of the shielding gas on the quality of a piece fabricated with silicon electrical steel - ABNT 50F 466M, best known for its 50A 400 specification on the JIS standard. The first step of the study was the designing of the experiment to obtain welded pieces with different combinations of the parameters above mentioned and enable the evaluation of mechanical strength, fillet weld size, hardness and metallographic analysis of the test specimens. The information obtained with analysis of variance techniques (ANOVA) showed that the change in the levels of electrical current and welding speed promotes significant changes in final results. Furthermore, the different rates of gas flow tested caused no differences in response variables of the study.…

Advisors/Committee Members: Guilherme Ourique Verran.

Subjects/Keywords: Aço Elétrico Silicioso; Soldagem TIG; Otimização dos Parâmetros deSoldagem; Optimization of welding Parameters; DOE methodology; Metais; Metodologia DOE; ENGENHARIA DE MATERIAIS E METALURGICA; Silicon electrical steel; TIG welding

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Schlickmann, M. N. (2010). Avaliação da influência dos parâmetros do processo de soldagem TIG sobre a qualidade de uma peça fabricada em aço elétrico silicioso. (Thesis). Universidade do Estado de Santa Catarina. Retrieved from http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2079 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2080 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2081 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2082 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2083 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2084 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2085 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2086

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Schlickmann, Marcelo Niehues. “Avaliação da influência dos parâmetros do processo de soldagem TIG sobre a qualidade de uma peça fabricada em aço elétrico silicioso.” 2010. Thesis, Universidade do Estado de Santa Catarina. Accessed January 19, 2020. http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2079 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2080 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2081 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2082 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2083 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2084 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2085 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2086.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Schlickmann, Marcelo Niehues. “Avaliação da influência dos parâmetros do processo de soldagem TIG sobre a qualidade de uma peça fabricada em aço elétrico silicioso.” 2010. Web. 19 Jan 2020.

Vancouver:

Schlickmann MN. Avaliação da influência dos parâmetros do processo de soldagem TIG sobre a qualidade de uma peça fabricada em aço elétrico silicioso. [Internet] [Thesis]. Universidade do Estado de Santa Catarina; 2010. [cited 2020 Jan 19]. Available from: http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2079 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2080 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2081 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2082 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2083 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2084 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2085 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2086.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Schlickmann MN. Avaliação da influência dos parâmetros do processo de soldagem TIG sobre a qualidade de uma peça fabricada em aço elétrico silicioso. [Thesis]. Universidade do Estado de Santa Catarina; 2010. Available from: http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2079 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2080 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2081 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2082 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2083 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2084 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2085 ; http://www.tede.udesc.br/tde_busca/arquivo.php?codArquivo=2086

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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