Skip to Main content Skip to Navigation
Journal articles

Evaluation of Microstructure and Hardness of Novel Al-Fe-Ni Alloys with High Thermal Stability for Laser Additive Manufacturing

Abstract : The microstructure and phase composition of cast and laser-melted Al-Fe-Ni alloys were investigated. Two main phases—Al3(Ni,Fe) and Al9FeNi—were formed in the as-cast state. A fine microstructure without porosity or solidification cracks was observed in the Al-Fe-Ni alloys after laser treatment. The hardness of the laser-melted alloys was 2.5–3 times higher than the hardness of the as-cast alloys owing to the formation of an aluminum-based solid solution and fine eutectic particles. The formation of the primary Al9FeNi phase was suppressed as a result of the high cooling rate. Annealing these alloys at temperatures less than 300°C demonstrated the high thermal stability of the microstructure while maintaining the hardness. The Al-Fe-Ni alloys investigated in this study are promising heat-resistant materials for additive manufacturing because of their fine, stable structure, and the low interdiffusion coefficients of Fe and Ni.
Document type :
Journal articles
Complete list of metadatas

https://hal-mines-albi.archives-ouvertes.fr/hal-02928476
Contributor : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Submitted on : Wednesday, September 2, 2020 - 3:31:09 PM
Last modification on : Friday, September 4, 2020 - 3:08:15 AM

Identifiers

Citation

I.S. Loginova, Marjolaine Sazerat, P.A. Loginov, A.V. Pozdniakov, N.A. Popov, et al.. Evaluation of Microstructure and Hardness of Novel Al-Fe-Ni Alloys with High Thermal Stability for Laser Additive Manufacturing. JOM Journal of the Minerals, Metals and Materials Society, Springer Verlag (Germany), In press, ⟨10.1007/s11837-020-04321-2⟩. ⟨hal-02928476⟩

Share

Metrics

Record views

14