Role de la microstructure en ZAT sur la fragilisation par l'hydrogeneFunded under: FP4-BRITE/EURAM 3
The aim of this project was to study the influence of the microstructure on the behaviour of different types of steel likely to be used in the fabrication of pressure cylinders and containers. The study involved both industrial and experimental castings. Four different types of steel used in industry were studied. Five experimental castings were carried out to determine the influence of different alloys. Two welds were also made on two industrial steels. The results obtained on experimental castings did not clarify the rôle of different elements alloyed with the steel, as all the castings performed well. The results obtained on the industrial castings showed different tendancies depending on which steel was used. The electrochemical permeation trials carried out on the different steels showed different patterns of hydrogen diffusion. Th trials involving the first two steels showed that the capacity for diffusion of hydrogen is greater in tempered structures than in raw structures. With the third steel the opposite was observed, which may be explained by the precipitation of vanadium carbides The trials carried out on real welded joins led to results similar to those obtained on simulated structures.
Bibliographic Reference: EUR 18565 FR (1998) 109pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-4899-X
Record Number: 199910633 / Last updated on: 1999-04-26
Original language: fr
Available languages: fr