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A laser-welded TA15 titanium alloy tube with outer diameter of 40mm and thickness of 2mm was fabricated successfully by hot U–O forming process combining with laser beam welding. The formability of the laser-welded tube was tested at 800°C by hot gas free bulging on the self-designed high pressure gas forming platform. Both the microstructure evolutions of the weld seam and basal material during the...
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