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Detection of Microscale Flaws in Friction Stir Welds

Webinars 18 May 2021

Friction Harmonics is an EU-funded Horizon 2020 Fast Track to Innovation (FTI) project that is developing a non-linear ultrasonic inspection system for the detection of microscale flaws in friction stir welds.

During this webinar, the project partners will provide an overview of the consortium’s recent experience in developing and evaluating the Friction Harmonics inspection system.

Topics discussed will include an introduction to friction stir welding and microscale flaws, an outline of the Friction Harmonics project, an overview of the non-linear ultrasonic inspection technique developed and the results achieved using a series of specially prepared test specimens.


Who should attend?

Inspection engineers, manufacturing engineers and researchers with an interest in:

  • Inspection of friction stir welds
  • Non-linear ultrasonic inspection
  • Semi-automated inspection using advanced scanning systems


This project has received funding from the European Union‘s Horizon 2020 research and innovation programme under grant agreement No 780662.


Mr Richard Freeman - Associate Director

Mr Richard Freeman

Associate Director

Richard Freeman has also worked in the composites industry (Courtaulds) and served an apprenticeship in the steam turbine industry at NEI Parsons.

He obtained an honours degree in Metallurgy from Sheffield University in 1987, and a PhD in wear and corrosion resistant materials for aircraft actuation systems in 1994, while in full time employment with Lucas Aerospace.

Richard looks after the TWI customer base in the transport sector (aerospace and defence, automotive, rail and ship building) and sits on the AWS D17 committee for welding in the aerospace industry. He is TWI's representative on the Nadcap Welding Task Group, and also represents TWI on the Executive Committee of the UK Titanium Information Group and the UK Offset Strategy Group.

He assists TWI's Professional Division as the Professional Review Interviewer for MWeldI, SenMWeldI and CEng applications.

Jonathan Martin - Section Manager - Friction & Forge Processes

Jonathan Martin

Section Manager - Friction & Forge Processes

Jonathan Martin is the Friction Stir Welding Technology Manager at TWI and a Fellow of the Welding Institute. He joined TWI in 2005 and has more than 20 years’ of experience in Friction Stir Welding activities. A metallurgist by training but over the years has gained experience in all aspects of FSW, including participating in FSW standard working groups, developing FSW training courses and delivering engineering solutions across the world. Since 2008, he has run the International Symposium on Friction Stir Welding and has published/presented over 40 scientific research reports and papers.

Karl Chisholm - Project Leader (NDE)

Karl Chisholm

Project Leader (NDE)

Karl Chisholm is a Project Leader in the Non Destructive Examination group working with ultrasonic and phased array ultrasonic inspection. He joined TWI in 2018 after gaining a degree in Mechanical Engineering and a Masters degree in Petroleum Engineering from Teesside University. He is currently completing a part-time Masters degree in Engineering Management and Leadership at Aston University. His previous professional experience includes five years’ service as a Ground Installations Technician in the Royal Air Force.

Martin Bourton - Principal Project Leader (NDE)

Martin Bourton

Principal Project Leader (NDE)

Following graduation from the University of East Anglia in 1987, Martin joined TWI as a project leader developing hardware and software solutions. Since 2014, he has managed a series of technology transfer programmes and collaborative research projects related to welding engineering and structural integrity.

Makis Pachos - Technical Manager - Robotics and Automation

Makis Pachos

Technical Manager - Robotics and Automation

Following graduation from the National Technical University of Athens, Makis pursued a career in robotics automation and later in aerospace quality. Since 2018, he has managed a series of commercial and collaborative research projects related to robots for wind turbine inspection, heat exchanger cleaning and non-destructive testing.

For more information please email: