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Acta Metall Sin  1978, Vol. 14 Issue (4): 440-447    DOI:
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THE APPLICATION OF PHACOMP IN IRON-BASE SUPERALLOY
Res. Gp. of Superalloy Beijing Institute of Iron and Steel Technology
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Res. Gp. of Superalloy Beijing Institute of Iron and Steel Technology. THE APPLICATION OF PHACOMP IN IRON-BASE SUPERALLOY. Acta Metall Sin, 1978, 14(4): 440-447.

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Abstract  The application of PHACOMP with a view to estimating the amount of σ-phase in complex iron-base superalloys has been carried out. Results obtained on certain commercial as well as experimental heats sustained its usefulness. The formula:△N′_V= Ni-3Ti-3.5A1-1.7Si-0.9Cr-4.7 has been found to be useful in predicting the conditions with regard to the formation of σ-phase of a 25Ni-15Cr type alloy as an example. When △N_V>0, the alloy remained σ-free after prolonged exposure at 650℃.
Received:  18 April 1978     
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