CHARACTERIZATION OF TITANIUM WELDED JOINTS BY THE ORBITAL GAS TUNGSTEN ARC WELDING PROCESS FOR AEROSPACE APPLICATION. doi: 10.5028/jatm.2010.02026710

Authors

  • José A. Orlowski de Garcia Instituto de Aeronáutica e Espaço São José dos Campos – Brazil
  • Gerson Luiz de Lima Instituto Nacional de Pesquisas Espaciais São José dos Campos – Brazil
  • Wilson D. Bocallão Pereira Instituto de Aeronáutica e Espaço São José dos Campos – Brazil
  • Valdir Alves Guimarães Univers. Estadual Paulista Guaratinguetá – Brasil
  • Carlos de Moura Neto Instituto Tecnológico de Aeronáutica São José dos Campos – Brazil
  • Ronaldo Pinheiro R. Paranhos Universidade Estadual do Norte Fluminense Rio de Janeiro – Brazil

Keywords:

Orbital GTAW, Titanium, Satellite.

Abstract

In this work, three welding programs for orbital gas tungsten arc welding (GTAW), previously developed, were used, using pulsed current and increasing speed (#A), constant current (#B) and pulsed current and decreasing current (#C). One of these should be used for the propulsion system of the Satellite CBERS (China – Brazil Earth Resources Satellite). Welded joints using tubes of commercially pure titanium were obtained with these procedures, which were characterized by means of mechanical and metallographic tests. The obtained results showed that the three welding procedures produce welded joints free of defects and with adequate shape. Although small differences on mechanical properties and on microstructure have been observed, the three welding programs attained compatible results with international standards used in the aerospace segment. The welding program #B, due to the reduced heat input used, was considered to obtain slightly advantage over the others.

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Published

2011-07-29

Issue

Vol. 2 No. 2 (2010): May./Aug. 2010

Section

Original Papers

License

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