Characterization of He embrittlement of a 9Cr–1Mo steel using local approach of brittle fracture

Autor:	L. Vincent, X. Averty, J. Malaplate, J. Henry, B. Marini
Rok vydání:	2008
Předmět:	Toughness Materials science Mechanical Engineering Metallurgy chemistry.chemical_element Finite element method Characterization (materials science) Fracture toughness chemistry Mechanics of Materials Martensite Fracture (geology) General Materials Science Embrittlement Helium
Zdroj:	Engineering Fracture Mechanics. 75:3570-3580
ISSN:	0013-7944
DOI:	10.1016/j.engfracmech.2007.02.019
Popis:	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 −170 °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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fe5eb168133bf5594de898d43c9bc673 https://doi.org/10.1016/j.engfracmech.2007.02.019 Zobrazit plný text záznamu Full Text from ScienceDirect