Structural evolution of Fe–50at.% Al powders during mechanical alloying and subsequent annealing processes

Ehtemam-Haghighi, Shima; Janghorban, K.; Izadi, S.

doi:10.1016/j.jallcom.2010.01.145

Cited by 43 publications

(12 citation statements)

References 18 publications

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“…1a indicates that 80 h of milling results in the development of a single phase, a disordered solid solution (Fe(Al)). This transformation has been also reported by other researchers [10][11][12][13][14][15][16][17][18][19]. The lattice strain and crystallite size of the milled powder are 3.1% and 15 nm, respectively.…”

Section: Resultssupporting

confidence: 88%

Order-sintering of mechanically alloyed FeAl nanostructures

Ehtemam-Haghighi

Janghorban

Izadi

2010

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 88%

Order-sintering of mechanically alloyed FeAl nanostructures

Ehtemam-Haghighi

Janghorban

Izadi

2010

Journal of Alloys and Compounds

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“…During this process we are able to produce intermetallics in 2-4 h [19]. This is more rapid than the milling times needed with other processing parameters reported in the literature to achieve similar phase composition and microstructure [20][21][22][23]. The above defined ultra-high energy mechanical alloying process is more efficient than the use of dedicated high-energy milling devices using 1200-2000 rpm [19].…”

mentioning

confidence: 92%

“…% Al, described changes in the phase composition of the mechanically alloyed powder, and consequently the influence of the milling time on the crystallite size, the lattice strain and the lattice parameter. Also, Haghighi et al [22] studied the mentioned system and the grain size as well as the lattice parameter depending on the milling time. Both teams, though working with different milling conditions, observed the same trend that the powder particle size increased at the initial stage, but then it began to decrease and in the end it remained constant.…”

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confidence: 99%

Synthesis of Intermetallics in Fe-Al-Si System by Mechanical Alloying

Nová

Novák

Průša

et al. 2018

Metals

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Fe-Al-Si alloys have been recently developed in order to obtain excellent high-temperature mechanical properties and oxidation resistance. However, their production by conventional metallurgical processes is problematic. In this work, an innovative processing method, based on ultra-high energy mechanical alloying, has been tested for the preparation of these alloys. It has been found that the powders of low-silicon alloys (up to 10 wt. %) consist of FeAl phase supersaturated by Si after mechanical alloying. Fe2Al5 phase forms as a transient phase at the initial stage of mechanical alloying. The alloy containing 20 wt. % of Si and 20 wt. % of Al is composed mostly of iron silicides (Fe3Si and FeSi) and FeAl ordered phase. Thermal stability of the mechanically alloyed powders was studied in order to predict the sintering behavior during possible compaction via spark plasma sintering or other methods. The formation of Fe2Al5 phase and Fe3Si or Fe2Al3Si3 phases was detected after annealing depending on the alloy composition. It implies that the powders after mechanical alloying are in a metastable state; therefore, chemical reactions can be expected in the powders during sintering.

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“…FeAl formation started rapidly by the creation of Al-rich and Ferich solid solutions; the latter became dominant after long milling times and tended to the composition Fe-35 at % Al. Haghighi et al [12] investigated the structural evolution of nanocrystalline Fe-50 at % Al compound during MA. As their results showed, with increasing the milling time, the lattice parameter of the Fe(Al) phase increased due to the solution of Al atoms in Fe lattice and reached a steady value after 80 h of milling.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Mechanically Alloyed Nanocrystalline Fe(Al): Crystallite Size and Dislocation Density

Mhadhbi

Khitouni

Escoda

et al. 2010

Journal of Nanomaterials

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A nanostructured disordered Fe(Al) solid solution was obtained from elemental powders of Fe and Al using a high-energy ball mill. The transformations occurring in the material during milling were studied with the use of X-ray diffraction. In addition lattice microstrain, average crystallite size, dislocation density, and the lattice parameter were determined. Scanning electron microscopy (SEM) was employed to examine the morphology of the samples as a function of milling times. Thermal behaviour of the milled powders was examined by differential scanning calorimetry (DSC). The results, as well as dissimilarity between calorimetric curves of the powders after 2 and 20 h of milling, indicated the formation of a nanostructured Fe(Al) solid solution.

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Structural evolution of Fe–50at.% Al powders during mechanical alloying and subsequent annealing processes

Cited by 43 publications

References 18 publications

Order-sintering of mechanically alloyed FeAl nanostructures

Order-sintering of mechanically alloyed FeAl nanostructures

Synthesis of Intermetallics in Fe-Al-Si System by Mechanical Alloying

Characterization of Mechanically Alloyed Nanocrystalline Fe(Al): Crystallite Size and Dislocation Density

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