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In-situ synthesis of aluminum/nano-quasicrystalline Al-Fe-Cr composite by using selective laser melting

Article dans une revue avec comité de lecture
Author
KANG, Nan
196891 State Key Laboratory of Solidification Processing
EL MANSORI, Mohamed
211915 Mechanics surfaces and materials processing [MSMP]
301080 Texas A&M University [College Station]
LIN, X.
196891 State Key Laboratory of Solidification Processing
GUITTONNEAU, Fabrice
211915 Mechanics surfaces and materials processing [MSMP]
LIAO, H.L.
227673 Laboratoire d'Études et de Recherches sur les Matériaux, les Procédés et les Surfaces [IRTES - LERMPS]
HUANG, W.D.
196891 State Key Laboratory of Solidification Processing
CODDET, C.
227673 Laboratoire d'Études et de Recherches sur les Matériaux, les Procédés et les Surfaces [IRTES - LERMPS]

URI
http://hdl.handle.net/10985/17648
DOI
10.1016/j.compositesb.2018.08.108
Date
2018
Journal
Composites Part B: Engineering

Abstract

In this research, Al-Fe-Cr quasicrystal (QC) reinforced Al-based metal matrix composites were in-situ manufactured by using selective laser melting (SLM) from the powder mixture. The parametrical optimization based on our previous work was performed with focus on laser scanning speed. From the optimized parameters, an almost dense (99.7%) free-crack sample was fabricated with an ultra-fine microstructure. A phase transition from decagonal QC Al65Cu25Fe10Cr5 to icosahedral QC Al91Fe4Cr5 could be observed as laser scanning speed decreases. Differential scanning calorimetry curves show that the QC phase is quiet stable until 500 °C. And then, the effects of annealing temperature on the microstructural and mechanical properties were determined. The results indicate that the recrystallization and growth behavior of α-Al grains could be prevented by QC particle during annealing. Furthermore, the growth of QC particle, which tends to form a porous structure, leads an improvement of Young modulus and decline of ductility.

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