Creep crack growth behavior of P91 steel weldments

The steels operating at elevated temperatures are well known to be exposed to premature failure due to cracking caused by constant thermal stress, i.e. secondary creep process. Therefore, creep crack growth (CCG) tests were carried out on compact tension (CT) specimens machined from P91 weld joint a...

Full description

Saved in:
Bibliographic Details
Published in:Thermal science 2019, Vol.23 (2 Part B), p.1203-1209
Main Authors: Swei, Mohamed, Sedmak, Aleksandar, Petrovski, Blagoj, Golubovic, Zorana, Sedmak, Simon, Katinic, Marko, Azzabi, Khaled
Format: Article
Language:English
Subjects:
Compact tension
Crack propagation
Creep (materials)
Finite element method
Heat affected zone
High temperature
Numerical methods
Numerical prediction
Series (mathematics)
Thermal stress
Weld metal
Welded joints
Weldments
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The steels operating at elevated temperatures are well known to be exposed to premature failure due to cracking caused by constant thermal stress, i.e. secondary creep process. Therefore, creep crack growth (CCG) tests were carried out on compact tension (CT) specimens machined from P91 weld joint at 600°C to determine its behaviour in realistic conditions. At the same time, numerical method for predicting the CCG in CT specimens by a series of incremental steady state finite element (FE) analysis were performed using Norton’s law to represent creep behaviour. Verification of the FE predictions were obtained for weld metal (WM) and heat affected zone (HAZ) by comparison with experimental results, indicating at the same time that creep crack growth rates are significantly higher for WM than for BM.
ISSN:0354-9836
2334-7163
DOI:10.2298/TSCI170729240S