Comparison of Niobium, Hafnium, and Tantalum as Eutectic Formers in Ni Welds April 15, 2013 dhernandez@aws.org Comparison of Niobium, Hafnium, and Tantalum as Eutectic Formers in Ni Welds Hafnium, and Tantalum as Eutectic Formers in Ni Welds