Scandium in Aluminum Alloys

Aluminum alloys that contain dilute scandium additions display upgraded pro perties in
several areas. In conjunc-tion with zirconium, scandium forms very fine, coherent precipitates
that impart strength andserve to inhibit recrystallization in aluminum alloys. In addition, these
alloys dis-play improved hot-cracking resistance during welding, and enhanced weld strength

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