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  • Weld Cracking - Mechanisms and Mitigation

Weld Cracking - Mechanisms and Mitigation

  • 10 May 2022
  • 9:00 AM - 12:00 PM
  • Online (Zoom)
  • 351


Registration is closed
Technical Group Webinar

A Materials Technical Group Webinar

Weld cracking is a serious issue that has in the past led to catastrophic failure of welded structures, vessels, pipelines and other assets and continues to pose a threat.

Knowledge of crack types and an understanding of the mechanisms by which cracking can arise are both essential to ensure the avoidance of cracking.

Also required is a knowledge of the factors that give rise to cracking. Materials susceptibility, joint design, welding process and procedure details including consumable selection, pre-heat, heat input and post weld heat treatment etc. all play an important role. Capability and selection of non-destructive testing techniques is also of paramount importance, as are in-service conditions and inspection strategies.

This webinar will delve into this crucial subject drawing on the knowledge and experience of TWI experts and speakers from industry.

Cracking types and mechanisms will be described and several case studies will be presented. Mitigation methods and management strategies will also be explored.

It will be of particular interest to metallurgists, materials scientists and engineers, welding engineers, project engineers and managers in the power generation and process plant, oil and gas, structural and construction industries.

Experts from industry and TWI will be presenting on a range of topics:

  • Metallurgical Cracking Mechanisms and a Case StudyJoanna Nicholas, Principal Metallurgist, TWI Ltd

  • Fabrication cracking/flaws in structural steels - Dave Howse, Technology Fellow, TWI Ltd

  • Liquid Metal Embrittlement In SAWL Pipe Manufacture – Experience and Mitigation - Karl Nicholson, Operations Manager/Vince Dawkins, Welding Engineer, Liberty Steel Pipes (Hartlepool) Ltd

  • Managing Cracking in Pipelines - Osorio Goncalves, Principal Engineer, Rosen UK

    Download the latest programme here.

    • Professional Members of The Welding Institute: £25 + VAT (£30)
    • Industrial Members of TWI: £25 + VAT (£30)
    • Non-members: £95 + VAT (£114)
    • Retired Members: £25 + VAT (£30)
    • Students: £25 + VAT (£30)
    • TWI Training School Customers: £70 + VAT (£84)
    • TWI Staff - please contact Becki Parratt if you wish to register

    Please note that payment must be made before the event in order to receive the joining instructions for the event.


    If you can't join us on the day, you can still access the recording of the webinar and the presentations by registering ahead of the event.*

    *presentation dissemination is dependent on presenter consent.


    Registering on this Technical Group webinar as a non-member or a TWI Training Customer gives you full Associate Membership (AWeldI) for one year. To activate your membership, just complete the highlighted fields on the event registration form.

    You will also benefit from:

    • Information transfer from experts
    • Discussion, questions and answers on the specific topics
    • A broader understanding of the extent of standards in the industry
    • Attendance of this event qualifies for CPD 


    The Welding Institute awards points towards CPD for delegates attending this webinar. Every hour attendance of an event will earn 2 points towards your continuing professional development.

    Please contact becki.parratt@twi.co.uk if you require a certificate of attendance towards your continuing professional development.













    Karl Nicholson - Operations Manager - Liberty Pipes (Hartlepool) Ltd

    Karl has been at the fore of multi wire SAW application within Line pipe manufacture for over 10 years, formerly as welding Engineer and now as Operations Manager at Liberty Pipes Hartlepool.

    LPH supplies pipe line projects predominantly into the oil and gas industry, dealing with all levels of the supply chain.

    At Liberty Pipes Hartlepool we understand the requirements of our clients, and as such deal not only with the products we supply but also in confidence, to ensure a reduced risk to our clients.

    Karl is a certified international welding engineer and registered with the engineering council, he also sits on various committee/working groups, including BSI, ISO and with TWI, related to welding and joining.

    Vince Dawkins - Welding Engineer - Liberty Pipes (Hartlepool) Ltd

    Vince has worked in the SAW mill at Hartlepool for over 25 years, and has been the Welding Engineer for 8 years.

    Vince is a Chartered Certified Welding Engineer and is also the current Chair of the TWI Teesside Branch committee.

    Joanna Nicholas - Team Manager, Metallurgy, Materials and Structural Integrity Group - TWI Ltd

    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.

    Dave Howse - Consultant Welding Engineer - TWI Ltd

    David Howse has more than 30 years’ experience in welding engineering, having worked on major projects relating to oil and gas, construction and infrastructure. He graduated in metallurgy from Leeds, later completing an EngD entitled ‘Improved productivity in fusion welding’ at Warwick, and has authored and contributed to more than 20 publications.

    David joined TWI in 1994 as a senior project leader in the arcs section. He later spent time as section manager in lasers before, more recently, assuming a senior technical role in the Arc Processes, Fabrication and Welding Engineering section. David has provided technical support to many of TWI’s member companies and overseen a large number of research projects into various aspects of joining technology.

    Osorio Goncalves - Principal Engineer - Rosen

    Bachelor in Metallurgy and Materials Engineering. Master in Advanced Mechanical Engineer from Imperial College London. Worked for 17 years in Petrobras (Brazil) dedicated to inspection, integrity assessment and management of pipelines and pressure equipment holding technical and managerial positions. Was also responsible for developing and implementing strategies for the integrity management of pipelines susceptible to SCC including prioritization, direct assessment, ILI, defect assessments and repair methods and criteria.

    Since 2018 Osorio works as a Principal Engineer in ROSEN Integrity Services, Crack Management in Newcastle upon Tyne, UK leading integrity management projects for pipelines with cracking issues in Europe and South America.

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