SharePoint
Aide
IRSN, Institut de radioprotection et de sûreté nucléaire

Search our site :

ok

Contact us :

ok
En Fr

All our expertise to protect you


Research

Thesis proposals

Low cycle fatigue of 690 nickel based alloy in primary circuit environment


ReferencesRES21-8

Themes: Engineering sciences: solid mechanics, materials, civil engineering 

Thesis location: Mechanics and Materials Experimental Research Laboratory (LE2M)​ - Cadarache (13)

Start: October 2021


Skills required


Master's degree or engineering degree, ideally in materials mechanics. 

Desired skills: knowledge of metal alloys and fatigue. 

A very good level of English is required. Finally, good writing and reporting skills are required.

Age limit: 26 years old unless otherwise stated.


Thesis subject


This PhD thesis proposal is dedicated to the study of the effect of PWR primary circuit environment on fatigue life of components made of nickel based alloy 690. First, fatigue mean curve of this alloy will be experimentally evaluated in air since this environment is usually employed to determine fatigue mean curve in nuclear codes (in France, RCC-M). Then, and in order to evaluate fatigue life in a perfectly neutral environment, fatigue tests will be performed in vacuum. And, at last, in PWR primary environment. These tests will enable to determine if the RCC-M assomptions are correct for Ni based alloys but additionnal tests will be necessary to comprehend the effect of the environment. This study will be based on fractographic observation with striation measurements of the specimens employed for the reference curves described previously but also combining different successive environment on the same specimen and observing the evolution of crack initiation and propagation sites. The effect of the environment on plasticity at crack tip (and hence its propagation) will also be evaluated by TEM observations. These elements will enable to have a better comprehension on the effect of the environment on fatigue life of 690 Ni based alloy.​ 

Send Print

Involved IRSN laboratory

Send your resume, cover letter


Walter CHITTY​

phone: +33 4 42 19 94 48
adress: CEN de Cadarache. Batiment 327. 13115 St Paul lez Durance cedex.​

Close

Send to a friend

The information you provide in this page are single use only and will not be saved.
* Required fields

Recipient's email:*  

Sign with your name:* 

Type your email address:*   

Add a message :

Do you want to receive a copy of this email?

Send

Cancel

Close

WP_IMPRIMER_TITLE

WP_IMPRIMER_MESSAGE

Back

Ok