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Characterization of He embrittlement of a 9Cr–1Mo steel using local approach of brittle fracture by J. Malaplate; L. Vincent; X. Averty; J. Henry; B. Marini is a Engineering article available to read on EtoBox.

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Ferritic-martensitic steels are prime candidate materials for future reactors. We present here the results of a study on the effects of helium implantation on the fracture behavior of 9Cr (T91) martensitic steels. Three-points static bending tests were performed at room temperature on implanted specimens and at À170 °C on un-implanted material. All these tests led to brittle fracture. Based on a mechanical analysis of the tests results using Finite Element calculations, we have proposed that the mechanism of brittle fracture is controlled by a double criterion depending on implantation temperature and helium content. Furthermore, by applying the Beremin model, the toughness of helium implanted steel has been evaluated.

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Author

J. Malaplate; L. Vincent; X. Averty; J. Henry; B. Marini

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0013-7944)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)