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Influence de la structure de soudure et de la teneur en ferrite delta sur les propriétés de fatigue à température cryogénique d'aciers inoxydables austénitiques soudés par TIG.

Effect of welding structure and delta-ferrite on fatigue properties for tungsten-inert-gas (TIG) welded austenitic stainless steels at cryogenic temperatures.

Auteurs : YURI T., OGATA T., SAITO M., et al.

Type d'article : Article

Résumé

High-cycle and low-cycle properties of base and weld metals for SUS304L and SUS316L and the effects of welding structure and delta-ferrite on fatigue properties were investigated at cryogenic temperatures in order to evaluate the long-life reliability of the structural materials to be used in liquid hydrogen supertankers and storage tanks and to develop a welding process for these applications. The S-N curves of the base and weld metals shifted towards higher levels, i.e., the longer life side, with decreasing test temperatures. High-cycle fatigue tests demonstrated the ratios of fatigue strength at 10 power 6 cycles to tensile strength of the weld metals to be 0.35-0.7, falling below those of base metals with decreasing test temperatures.

Détails

  • Titre original : Effect of welding structure and delta-ferrite on fatigue properties for tungsten-inert-gas (TIG) welded austenitic stainless steels at cryogenic temperatures.
  • Identifiant de la fiche : 2002-1172
  • Langues : Anglais
  • Source : Cryogenics - vol. 40 - n. 4-5
  • Date d'édition : 04/2000

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