Influence of Temperature and Strain Rate on Dynamic Softening Processes in Allvac® 718Plus™

Stefan Mitsche; Christof Sommitsch; Daniel Huber; Martin Stockinger; Peter Poelt

doi:10.4028/www.scientific.net/MSF.706-709.2440

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HomeMaterials Science ForumMaterials Science Forum Vols. 706-709Influence of Temperature and Strain Rate on...

Influence of Temperature and Strain Rate on Dynamic Softening Processes in Allvac® 718Plus™

Abstract:

The efficiency of gas turbine engines can improved by an increase of the working temperature. As a consequence Allvac® 718Plus™ was developed to enhance the high temperature properties. Since the performance of this alloy is strongly related to the microstructure the knowledge of the softening processes is important to develop precise microstructure evolution models. Specimens were deformed at different temperatures (950°-1050°C) and strain rate (0.1s^-1 – 10s^-1) to strains of 0.2-1.5. The microstructures obtained were analyzed by electron backscatter diffraction (EBSD) in the scanning electron microscope to investigate the softening mechanisms at the respective forming conditions.

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Periodical:

Materials Science Forum (Volumes 706-709)

Pages:

2440-2445

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.706-709.2440

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Online since:

January 2012

Authors:

Stefan Mitsche, Christof Sommitsch, Daniel Huber, Martin Stockinger, Peter Poelt

Keywords:

Dynamic Recovery, Dynamic Recrystallization (DRX), EBSD, Nickel-Based Superalloy

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