Thèse de Doctorat
DOI
10.11606/T.3.2018.tde-15012018-154156
Document
Auteur
Nom complet
Julio Cezar Barcellos da Silva
Unité de l'USP
Domain de Connaissance
Date de Soutenance
Editeur
São Paulo, 2017
Directeur
Jury
Batalha, Gilmar Ferreira (Président)
Santos, Givanildo Alves dos
Miori, Gelson Freitas
Nakamoto, Francisco Yastami
Siqueira, Rafael Humberto Mota de
Titre en portugais
Análise do ciclo térmico da soldagem por atrito com pino consumível do aço inoxidável superduplex ASTM A890 grade 6A.
Mots-clés en portugais
Aço inoxidável
Atrito
Soldagem
Resumé en portugais
Titre en anglais
Thermal cycle analisys of the frictiontapered stud welding with consumable pin of super duplex stainless steel ASTM A890 grade 6A.
Mots-clés en anglais
Friction
Stainless steel
Superduplex
Thermal cycle
Welding
Resumé en anglais
This work analyzes the thermal cycle of the friction tapered stud welding - FTSW - of a super duplex stainless steel ASTM A890 - 6A. The propose of the analyses was elaborating a mathematical model to define some elements of the welding thermal cycle at three different joint points. The parameters controlled were the rotation, the axial force and the plunge depth of the pin. The thermal cycle equations were elaborated by the relationships between the controlled parameters and the output temperatures measured during the execution of the process. For recording of these temperatures, a joint geometry was fixed, and a factorial design of experiment was developed with three factors (rotation, axial force and plunge depth) and two levels. The joints were evaluated, and they met all established requirements. The thermal cycles were analyzed according to the values of the following elements: peak temperature - Tpeak, joint heating time between 500 °C and 800 °C - ?T5/8, and cooling time between 800 °C and 500 °C - ?T8/5. A list of equations that make the relation between the input variables (rotation, axial force and plunge depth) and the responses ?T5/8, T peak and ?T8/5 is presented. These equations allow evaluating the importance of each input variable (and its interactions) in relation to the response variable. The obtained models can be used in numerical simulations of welding by friction of the studied material.

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Date de Publication
2018-01-18

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