Thesis-2002-Maier.pdf (31.33 MB)
Segregation behaviour of phosphorus, manganese and carbon in boiler shell weld materials
thesis
posted on 2018-10-16, 10:26 authored by Petra MaierThe work in this thesis has developed theoretical models to predict the microstructural
behaviour of weld materials. Three different types of boiler shell weld materials from nuclear
power plants have been investigated. The materials considered differ mainly in the manganese
concentration and their microstructure after different temperature exposures during industrial
use. Element segregation can be predicted according to the typical reactor conditions and
therefore the influence of longer life times can be evaluated. Sufficient experimental data
have been taken by application of advanced transmission electron microscopes which offer
images of high quality.
The application of a thermodynamic software package MTDATA to predict the free
concentration of each element for model prediction has been. Phosphorus, of great interest
because it causes embrittlement, is enhanced at the grain boundary and increases with
operating temperature and life time. Its interaction with carbon and manganese is of interest.
Site-competition between carbon, phosphorus and manganese has to be applied. These site competition
model prediction results fit best to the experimental data. [Continues.]
Funding
British Nuclear Fuels Ltd.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Publisher
© Petra MaierPublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2002Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.Language
- en