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High Temperature Mechanical behaviour of Ni-Cr-Fe heat resistant cast steel

Abstract : The effect of microstructure on the high temperature behaviour of a Ni-Cr-Fe heat resistant cast steel is investigated. Specimens issued from the columnar and equiaxe zones of the ingot are tensile tested up to 950 degrees C. The comparative analysis of stress-strain and relaxation curves shows little difference in the macroscopic behaviour. Whatever the microstructure, the brittle to ductile transition occurs between 500 degrees C and 750 degrees C, and micro-cracking of interdendritic carbides is responsible of the instabilities shown on the stress-strain plots at 500 degrees C.
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Conference papers
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https://hal.archives-ouvertes.fr/hal-01701677
Contributor : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Submitted on : Tuesday, February 6, 2018 - 8:57:35 AM
Last modification on : Wednesday, June 24, 2020 - 4:19:51 PM

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  • HAL Id : hal-01701677, version 1

Citation

Stéphane Baleix, Philippe Lours, Gérard Bernhart. High Temperature Mechanical behaviour of Ni-Cr-Fe heat resistant cast steel. Eight international conference on mechanical behaviour of materials ICM 8, May 1999, Victoria, Canada. pp.653-657. ⟨hal-01701677⟩

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