Tue, 16 April, 2024
TWI is sponsoring the ‘Fatigue 2024’ conference taking place at Jesus College, Cambridge, UK, from 19-21 June 2024.
In addition to sponsoring this event, three representatives from TWI will present at the three day conference. Consultant, Carol Johnston will present on the topic of 'Fatigue Performance of Modern Submerged Arc Welds in 85mm Grade S355 Steel.' This presentation will detail concerns over conservative thickness correction in the fatigue design standards for wind turbine structures that use large plate thicknesses (>>50mm) with fatigue-critical circumferential welds made with submerged arc welding (SAW). Carol will provide details from a paper that presented results of recent fatigue tests on SAW welds in 85mm thick grade S355 steel, allowing the suitability of the thickness correction to be investigated.
Carol will be joined at the event by engineer Ali Bakir who will present on his PhD work into ‘Structural Integrity Assessment of Cold Spray Repaired High-Strength Aluminium 7075 Specimens.’ Aluminium alloy AA7075 is widely used in the aerospace industry, especially for wing skins, due to its high strength-to-weight ratio and durability. However, cyclic loading and corrosion can cause damage to these components over time requiring them to be repaired. These repairs have often been undertaken using the solid state cold spray (CS) deposition process. Despite the use of CS for repair applications over the past decade, there are still concerns over its use for structural components in the aerospace industry, with little being known about the mechanical performance of CS-repaired specimens. These concerns include the impact of porosity, interface defects and a lack of ductility. As a result, TWI investigated the fatigue performance of repaired specimens with different repair geometries.
In addition, TWI Project Leader, Dr Mehran Shahriarifar will present an 'Investigation on the Fatigue Behaviour of Stainless Steel 316L Produced by Laser Powder Bed Fusion Process' on Thursday 20 June. Additive manufacturing (AM) is an emerging technology that has recently gained large interest due to its potential to produce customised components with complex geometries. The laser powder bed fusion (L-PBF) process is one of the most widely employed AM processes for fabricating 3D metallic parts. However, L-PBF components generally suffer from the presence of process-induced imperfections, such as porosity and lack-of-fusion. These imperfections can act as stress raisers and lead to the initiation of cracks under fatigue loading. This study investigated the effect of build orientation and post-processing on the fatigue behaviour of stainless steel 316L produced by L-PBF process. Correlations were made between microstructure, defect, and build orientation with static and fatigue properties.
About Fatigue 2024
The Fatigue 2024 conference will build upon the long-established philosophy of the Engineering Integrity Society to provide a forum for practising engineers and researchers to exchange ideas and experiences related to all aspects of structural integrity.
The forum also gives practitioners a chance to stay up-to-date with the latest developments in materials durability and structural analysis. Researchers will have the opportunity to promote their work and its impact on industrial applications.
The three say event is taking place at Jesus College, Cambridge, UK, which was established in 1496 on the site of the twelfth-century Benedictine nunnery of St Mary and St Radegund.
The College includes notable buildings dating back to the 12th Century and a spectacular hall with vaulted ceilings that will provide a unique dining venue for the conference dinner.
You can find out more about ‘Fatigue 2024,’ here.