Launchpad, March - April 2005
For a full list of proposed, active and closed projects see here
Thermally sprayed aluminium for the prevention of corrosion and environmentally assisted cracking of welded corrosion resistant alloys
To be launched: May 2005
Cost per sponsor: £25,000, two payments
Project leader: Dave Harvey
Welded corrosion resistant alloys (CRAs) are subject to localised corrosion or environmentally assisted cracking in chloride-containing natural environments including stress corrosion cracking (SCC) and hydrogen embrittlement. The potential use of thermally sprayed aluminium and its alloys has been of increased interest to industry to mitigate such degradation and to avoid containment loss and associated plant safety and environmental risks. Successful work to protect duplex stainless steels in oil and gas production for both topside and immersed conditions is nearing completion at TWI, indicating that there is significant scope for assessing TSA and alloy variants for the prevention of SCC, pitting and crevice corrosion and hydrogen embrittlement (HE, HISCC) of other welded CRAs, thus providing the ability to optimise material and coatings selection to achieve long term integrity.
Computer based fatigue analysis
Launched: March 2005
Cost per sponsor: £15,000, two payments
Project Leader: Liwu Wei
This Joint Industry Project (JIP) will make a critical review and examination of the existing FEA based design procedures in terms of accuracy, validity and ease-of-use, with comparison to the large TWI fatigue database. It will be undertaken to establish a unified framework for assessing the fatigue life of welded joints using the current fatigue design rules.
The deliverable will be a report detailing recommending multi-level procedures for fatigue life assessment of welded structures, which includes detailed FEA procedures for obtaining relevant parameters used for fatigue assessment and the consolidated S-N curves.
