Methods and apparatus for producing large diameter superalloy ingots are disclosed. A material comprising at least one of a metal and a metallic alloy is introduced into a pressure-regulated chamber in a melting assembly. The material is subjected to a wide-area electron field within the pressure-regulated...http://www.google.se/patents/US20080179033?utm_source=gb-gplus-sharePatent US20080179033 - METHOD AND APPARATUS FOR PRODUCING LARGE DIAMETER SUPERALLOY INGOTS
