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Bimodal modelling of HIP of superalloys

Tien, J.K. / Borofka, J.C.

A model of HIP of a bimodal distribution of powder which predicts observed stress differences on powder particles is presented. Densification by the mechanisms of yield, power law creep, superplasticity, diffusional creep and diffusion is considered, and material parameters of Rene 95 are used. Calculated densification kinetics are compared with experimental data. Variable pressure during HIP in order to maintain densification by a particular deformation mechanism is proposed as a method to improve as-HIP superalloy morphology, with promising results. Extension of the model of new material systems and composites is discussed.

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Bimodal modelling of HIP of superalloys

Tien, J.K. / Borofka, J.C.

A model of HIP of a bimodal distribution of powder which predicts observed stress differences on powder particles is presented. Densification by the mechanisms of yield, power law creep, superplasticity, diffusional creep and diffusion is considered, and material parameters of Rene 95 are used. Calculated densification kinetics are compared with experimental data. Variable pressure during HIP in order to maintain densification by a particular deformation mechanism is proposed as a method to improve as-HIP superalloy morphology, with promising results. Extension of the model of new material systems and composites is discussed.

Bimodal modelling of HIP of superalloys

Tien, J.K. / Borofka, J.C.

A model of HIP of a bimodal distribution of powder which predicts observed stress differences on powder particles is presented. Densification by the mechanisms of yield, power law creep, superplasticity, diffusional creep and diffusion is considered, and material parameters of Rene 95 are used. Calculated densification kinetics are compared with experimental data. Variable pressure during HIP in order to maintain densification by a particular deformation mechanism is proposed as a method to improve as-HIP superalloy morphology, with promising results. Extension of the model of new material systems and composites is discussed.

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Title:

Bimodal modelling of HIP of superalloys

Additional title:

Bimodales Modellieren von Hip von Superlegierungen

Contributors:

Tien, J.K. (author) / Borofka, J.C. (author)

Published in:

HIP, Hot Isostatic Pressing, Theories and Applications, Proc. of the Int. Conf. ; 41-50

Publication date:

1988

Size:

10 Seiten, 12 Bilder, 3 Tabellen, 16 Quellen

Type of media:

Conference paper

Type of material:

Print

Language:

English

Keywords:

ISOSTATISCHES HEISSPRESSEN , SUPERLEGIERUNG , MODELLMETHODE , METALLPULVER , VERDICHTEN , KINETIK , MODALANALYSE , FLIESSBILD , SPANNUNGSVERLAUF (MECHANISCH) , KRIECHEN (WERKSTOFF) , DIFFUSION , SUPERPLASTIZITAET , RECHENVERFAHREN , DRUCKKRAFT , VERBUNDWERKSTOFF , MORPHOLOGIE (KOERPER) , DEFORMATION , PARTIKEL

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