Metadynamic Recrystallization of the Nickel-Based Superalloy Allvac 718PlusTM

Abstract:

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During hot working of the recently developed nickel based alloy Allvac 718PlusTM softening kinetics like dynamic, metadynamic as well as static recrystallization govern the microstructure evolution during and after hot forming and hence the final mechanical properties. In this work the metadynamic recrystallization was investigated using double hit compression tests. The classical methodology of offset stress comparison was not usable because of discontinuous yielding of this material. Thus a new method to describe the softening during metadynamic recrystallization was developed, which compares the deformation energy at equal strains, i.e. the area beneath the true strain vs. true stress curve, of the first and second hit as well as at steady state.

Info:

Periodical:

Materials Science Forum (Volumes 638-642)

Main Theme:

Edited by:

T. Chandra, N. Wanderka, W. Reimers , M. Ionescu

Pages:

2327-2332

DOI:

10.4028/www.scientific.net/MSF.638-642.2327

Citation:

C. Sommitsch et al., "Metadynamic Recrystallization of the Nickel-Based Superalloy Allvac 718PlusTM", Materials Science Forum, Vols. 638-642, pp. 2327-2332, 2010

Online since:

January 2010

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$35.00

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