Evaluation of Microstructure and Hardness of Novel Al-Fe-Ni Alloys with High Thermal Stability for Laser Additive Manufacturing - Archive ouverte HAL Access content directly
Journal Articles JOM Journal of the Minerals, Metals and Materials Society Year : 2020

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

(1) , (2, 3) , (3) , (3) , (1) , (3)
1
2
3

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.
Fichier principal
Vignette du fichier
Evaluation-of-Microstructure-and-Hardness-of-Novel-Al-Fe-Ni-Alloys-with-High-Thermal-Stability-for-Laser-Additive-Manufacturing.pdf (3.8 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-02928476 , version 1 (04-12-2020)

Identifiers

Cite

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, 2020, 72, pp.3744-3752. ⟨10.1007/s11837-020-04321-2⟩. ⟨hal-02928476⟩
61 View
92 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More