06-07 December 2021
ESKOM Webinar: Failure Analysis Modules 1, 2 and 4
There are many reasons behind cracking in welded assemblies. For carbon steels, these can be grouped into the metallurgical reasons; mechanical reasons and human factors. This presentation considers six of the metallurgical reasons for cracking in carbon and low alloy steels which may occur as a result of fabrication, and one with metallurgical susceptibility associated with service cracking. These metallurgical reasons can be understood and mitigated for at various stages of production and life, and are of relevance as they lead to costly repairs and rework, or catastrophic failure, if left unchecked. After the presentation, you will be aware of some of the reasons for the cracking, and how to avoid such cracking at fabrication or during service.
Joanna Nicholas will present Session 1 of this webinar and Michael Dodge will present Session 2.
Session 1 – Failure Investigation – Introduction and Procedure - 6th December
This session aims to cover why we do failure investigations and the difference between failure investigation and a root cause analysis, alongside the key types of activities that may be undertaken during a failure investigation.
Session 2 – Failure Investigation – Visual Examination and Non-destructive testing - 7th December
This session will cover some of the key points to remember whilst undertaking non-destructive evaluation of a failure – gathering all the information – including from unexpected sources.
It is advisable to register for both of these sessions on both days.
Continuing Professional Development
TWI awards points towards CPD for delegates attending this webinar. Every hour attendance of a webinar will earn 2 points towards your continuing professional development.
Please contact Becki Parratt if you require a certificate of attendance towards your continuing professional development.
Team Manager, Metallurgy, Materials and Structural Integrity Group
Joanna joined TWI in 1999, and has been involved in research, materials selection and failure investigations, mainly with ferritic steels. Joanna has also supported engineering critical assessment activities by undertaking post-test metallographic assessment on fracture toughness test specimens. She has also been involved in various aspects of computer modelling, particularly for research projects.
Joanna has broad knowledge of ferritic steels with particular emphasis on hydrogen cracking and hydrogen diffusion, HAZ hardness, mooring chain, fasteners, in-service welding and 9% Ni steels. She has carried out numerous investigations in these areas including failure investigation as well as production qualification and research. She currently serves on several BSI committees, providing welding and metallurgy input to the standards as required. Joanna lectures on the IIW/EWF diploma, and provides training and mentoring in other areas of welding metallurgy specialisms.
Joanna was awarded CEng in 2005, IWE in 2016, FWeldI in 2017 and FIMMM in 2018. Joanna is a STEM Ambassador, and delivers various activities to local schoolchildren, aiming to retain their interest in science, technology, engineering and mathematics, and was awarded the Welding Institute/Armourers and Brasiers Award for Best STEM Ambassador in 2015.
Principal Project Leader, Technology
Mike first joined TWI as a PhD student working to understand hydrogen-assisted cracking mechanisms in dissimilar metal welds. He now works within TWI’s Materials and Structural Integrity Technology Group where he leads failure investigations and research projects for TWI Industrial Members. He has a particular interest in environmentally-assisted cracking, and has authored a number of papers and technical reports on this topic.