1
Randall S Diehm, Blake K Zuidema: Segmented induction skull melting crucible and method. Howmet Corporation, Reising Ethington Barnard Perry & Milton, May 8, 1990: US04923508 (20 worldwide citation)

The crucible includes an upstanding sidewall formed of a plurality of internally cooled, metal segments arranged in side-by side relation to form a crucible chamber for receiving the metal to be melted. The segments are separated from one another by longitudinal gaps that communicate on the inside w ...


2
Randall S Diehm, Robert N Weerstra, Blake K Zuidema: Vacuum melting/casting method to reduce inclusions. Howmet Corporation, Flynn Thiel Boutell & Tanis, July 13, 1993: US05226946 (20 worldwide citation)

In the melting of one or successive alloy charges including one or more volatile alloying elements, each alloy charge is melted in a melting vessel under an inert gas partial pressure effective to reduce volatilization, migration and condensation of the volatile alloying elements and build-up of con ...


3
Andrew L Purvis, Christopher R Hanslits, Randall S Diehm: Solidification control including pattern recognition. Howmet Research Corporation, Edward J Timmer, November 24, 1998: US05841669 (12 worldwide citation)

A method of predicting a grain condition in a directionally solidified casting, comprises generating thermal history data for a directional solidification casting process, determining a plurality of casting process variables that statistically influence a plurality of different grain conditions, ide ...