The Effect of Hold-Times on the Fatigue Behaviour of Type AISI 316L Stainless Steel under Deuteron Irradiation.

Strain controlled fatigue tests have been performed in torsion at 400 C on type 316L stainless steel samples in both 20% cold worked and annealed conditions during an irradiation with 19 Mev deuterons. A hold time was imposed in the loading cycle. For the (cw) material, at shear strain ranges of 1.13% and 1.3%, irradiation creep induced stress relaxation led to the built up of a mean stress. The fatigue life was significantly reduced in comparison to thermal control tests. For the (ann) material, tested under similar experimental conditions, irradiation creep effects were negligibly small compared to cyclic and irradiation hardening. Thr fatigue life was only slightly reduced. Continuous cycling tests conducted under irradiation conditions lay in the scatter band of the termal control tests. The difference in fatigue life between continuous cycling and hold time tests is attributed mainly to the observed difference in irradiation hardening.

SCHOLZ Reinhard;  MUELLER Robert; 

1998-06-22

JRC16627

https://publications.jrc.ec.europa.eu/repository/handle/JRC16627,