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Beneficial effects induced by high temperature cycling in aged duplex stainless steel

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2007
auteur(s) Armas Alberto Franklin; Degallaix Gérard; Degallaix Suzanne; Herenu S.; Marinelli Maria-Cecilia; Alvarez-Armas Iris
journal (abréviation) Key Engineering Materials (Key Engineering Materials)
volume (numéro) 345-346
  
pages 349 – 352
résumé The cyclic behavior of type DIN 1.4460 duplex stainless steels in as-received and aged conditions was investigated at room temperature and at 500ᄎC. At room temperature, the aged samples showed embrittlement effects such as loss of toughness and reduction of fatigue life. At 500ᄎC, beneficial effects of the synergy between temperature and strain cycling were observed. It is proposed that at high temperature in the ferrite the strain cycling can decompose the chemical composition fluctuations, promoting a demodulation of the spinodal decomposition formed by aging.
mots clés Duplex stainless steel, fatigue, embrittlement, high temperature.
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