The Precipitation of Primary Carbides in Alloy 718

  title={The Precipitation of Primary Carbides in Alloy 718},
  author={Arnan Mitchell and Arlen Schmalz and Carlos Enrique Schvezov and Steven Lee Cockcroft},
The precipitation of primary MC carbides in alloy 7 18 has been studied using the techniques of directional solidification with and without quenching. The precipitation reaction: [Nb] + [C] = NbC (s) is found to follow normal thermodynamic relationships in alloys which have an amount of nitrogen well in excess of the saturation solubility of TiN at the carbide precipitation temperature. For alloys containing only small amounts of nitrogen ( N < 14 ppm), made by electron beam remelting, the… CONTINUE READING


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