Zonal refining of cast intermetallic alloy on TiAl base alloyed with niobium and chromium - G. M. Grigorenko; V. V. Lakomskij; I. I. Statkevich; R. V. Kozin; E. A. Asnis; N. V. Piskun; V. A. Berezos (Electrometallurgy Today, 2011)