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Communication Dans Un Congrès Année : 1999

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

Résumé

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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Dates et versions

hal-01701677 , version 1 (06-02-2018)

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  • HAL Id : hal-01701677 , version 1

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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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