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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/9411
Título: 
Repair Welding Effects on the Bending Fatigue Strength of AISI 4130 Aeronautical Steel used in a Critical to the Flight-Safety Structure
Autor(es): 
Instituição: 
Universidade Estadual Paulista (UNESP)
ISSN: 
0255-5476
Resumo: 
The aim of this study was to analyze the effect of successive TIG (tungsten inert gas) welding repairs on the reverse bending fatigue strength of AISI 4130 steel, which is widely used in components critical to the flight-safety. In order to simulate the abrupt maneuvers, wind bursts, motor vibration and helixes efforts, which generate cyclic bending loadings at the welded joints of a specific aircraft component called motor cradle, experimental reverse bending fatigue tests were carried out on specimens made from hot-rolled steel plate, 1.10 mm (0.043 in) thick, by mean of a SCHENK PWS equipment, with load ratio R = -1, under constant amplitude, at 30 Hz frequency and room temperature. It was observed that the bending fatigue strength decreases after the TIG (Tungsten Inert Gas) welding process application on AISI 4130 steel, with subsequent decrease due to re-welding sequence as well. Microstructural analyses and microhardness measurements on the base material, heat-affected zone (HAZ) and weld metal, as well as the effects of the weld bead geometry on the obtained results, have complemented this study.
Data de publicação: 
1-Jan-2010
Citação: 
Advanced Materials Forum V, Pt 1 and 2. Stafa-zurich: Trans Tech Publications Ltd, v. 636-637, p. 1451-1458, 2010.
Duração: 
1451-1458
Publicador: 
Trans Tech Publications Ltd
Palavras-chaves: 
  • Fatigue
  • AISI 4130 steel
  • Welding repairs on aeronautic structures
  • GTAW process
Fonte: 
http://dx.doi.org/10.4028/www.scientific.net/MSF.636-637.1451
Endereço permanente: 
http://hdl.handle.net/11449/9411
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/9411
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