About this Abstract |
Meeting |
6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
|
Symposium
|
6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
|
Presentation Title |
Structure-Property (Small Punch Creep Rupture) Relationships in Low Carbon Steels |
Author(s) |
Johan Westraadt |
On-Site Speaker (Planned) |
Johan Westraadt |
Abstract Scope |
Small-punch creep (SPC) testing is currently used to evaluate the creep-rupture properties of steels used in the petrochemical and power generating industries. In this project, various statistical and machine learning techniques are explored to determine the relationships between material compositions, characterised microstructures and experimentally measured creep-rupture properties for service exposed low carbon steels. A dataset consisting of 120 sample microstructures and its associated small-punch creep-rupture properties were collected from the service-exposed low carbon steels. Optical micrographs of the etched surfaces were processed using image analysis to determine the phase fractions and sizes of ferrite and pearlite. In addition, 2-point correlations combined with principle component analysis were performed on the optical micrographs and a simple microstructure-property model was constructed. A selection of 10 samples deviating from this simplified model were then further investigated using secondary electron imaging, electron-backscattered diffraction and nano-identation hardness in an effort to explain the observed deviations. |
Proceedings Inclusion? |
Definite: Other |