Welding the unweldable: TWI friction stir welds ODS steel
TWI, Cambridge/UK, has successfully
joined a type of steel alloy considered unweldable
using conventional fusion methods.
As part of its core research programme
into the friction stir welding of steel, TWI
has welded a number of samples of oxide
dispersion-strengthened (ODS) steels. These
specialised alloys have been developed to
deliver excellent strength and creep performance
at elevated temperatures, making them
suitable for applications in nuclear reactors
and power generation equipment,
where they are exposed to extreme heat.
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