Beneficial effects induced by cycling at high temperatura in an aged duplex stainless steel

A ARMAS; S DEGALLAIX; G DEGALLAIX; S HEREÑU; MC MARINELLI; I ALVAREZ

Bexno

Conferencia; 10th International Conference on the Mechanical Behavior of Materials; 2007

Korean Institute of Metals and Materials and Korean Society of Engineers

The cyclic behavior of type DIN 1.4460 duplex stainless steels in as-received and aged conditions was investigated at room temperature and at 500ºC. At room temperature, the aged samples showed embrittlement effects such as loss of toughness and reduction of fatigue life. At 500C, 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.