Fracture toughness evaluation of 20MnMoNi55 pressure vessel steel in the ductile to brittle transition regime: Experiment & numerical simulations

Autor:	Avinash Gopalan, J.K. Chakravartty, M. K. Samal
Rok vydání:	2015
Předmět:	Nuclear and High Energy Physics Materials science Tension (physics) Metallurgy Finite element method Pressure vessel Brittleness Fracture toughness Nuclear Energy and Engineering Damage mechanics Fracture (geology) General Materials Science Composite material Reactor pressure vessel
Zdroj:	Journal of Nuclear Materials. 465:424-432
ISSN:	0022-3115
DOI:	10.1016/j.jnucmat.2015.06.009
Popis:	In this work, fracture behaviour of 20MnMoNi55 reactor pressure vessel (RPV) steel in the ductile to brittle transition regime (DBTT) is characterised. Compact tension (CT) and single edged notched bend (SENB) specimens of two different sizes were tested in the DBTT regime. Reference temperature ‘T 0 ’ was evaluated according to the ASTM E1921 standard. The effect of size and geometry on the T 0 was studied and T 0 was found to be lower for SENB geometry. In order to understand the fracture behaviour numerically, finite element (FE) simulations were performed using Beremin's model for cleavage and Rousselier's model for ductile failure mechanisms. The simulated fracture behaviour was found to be in good agreement with the experiment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::46bdbdd56187fe7ee8b4f0fa1b852c6a https://doi.org/10.1016/j.jnucmat.2015.06.009 Zobrazit plný text záznamu Full Text from ScienceDirect