Room temperature hardness of carbides strengthened cast alloys in relation with their carbon content and aging temperature. Part 3 -Case of iron alloys - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Materials Science and Technology Année : 2009

Room temperature hardness of carbides strengthened cast alloys in relation with their carbon content and aging temperature. Part 3 -Case of iron alloys

P. Berthod

Résumé

Vickers macro–indentation was performed on seven cast and aged {Fe, 30wt.%Cr}–based alloys with carbon contents varying from 0 to 2.0 wt.%. The measured hardness was studied versus the carbon content and the aging temperature (1000, 1100 and 1200°C). The hardness increases with the carbon content, firstly slowly but much faster when the carbides fraction reaches 30 vol.%. A hardness of 600 Hv or more can then be achieved. For low carbon contents, the hardness increases slower than a law of mixture of the volume fractions and of the hardness of carbides and matrix. This is due to the great difference of hardness between the two phases responsible, which leads to the deformation of the matrix only. Beyond the critical value of 30 vol.% of carbides, i.e. when the carbon content approaches 2 wt.%C, hardness drastically increases since the main role in resistance against indentation is then played by the hard carbides skeleton which has become continuous enough.

Domaines

Chimie Matériaux
Fichier principal
Vignette du fichier
MaterialsScienceAndTechnology2009p1003.pdf (8.81 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02433205 , version 1 (09-01-2020)

Identifiants

Citer

P. Berthod. Room temperature hardness of carbides strengthened cast alloys in relation with their carbon content and aging temperature. Part 3 -Case of iron alloys. Materials Science and Technology, 2009, pp.1003 - 1008. ⟨10.1179/174328409X430519⟩. ⟨hal-02433205⟩
8 Consultations
22 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More