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We examine a Fe–Cr–Al foil-based material and a continuous-wave laser weld generated in ultra-fine “keyhole” mode undergoing tensile and creep-tension tests over a temperature range of 25–1000°C. At all temperatures, the bead exhibits superior tensile resistance than the base material due to a homogenous reprecipitation of fine aluminum nitrides, AlN, but creeps faster at 900°C, because of a finer-grained...
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