Melting, Processing, and Properties of Disordered Fe-Al and Fe-Al-C Based Alloys

Prasad, V.V. Bhanu; Khaple, Shivkumar; Baligidad, R. G.

doi:10.1007/s11837-014-1065-1

Cited by 19 publications

(25 citation statements)

References 14 publications

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“…While the attractive properties of Fe-Al and Fe-Al-Si alloys are becoming increasingly evident, the technology is still insufficient to process them reliably and efficiently in order to maximize their mechanical properties. The already tested or practically applied methods include wire-arc additive manufacturing [11], air/vacuum induction melting [12], electroslag remelting [13], and hot pressing [14,15]. Mechanical alloying (MA) is a promising route for preparation of Fe-Al and Fe-Al-Si alloys.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

confidence: 99%

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

Nová

Novák

Průša

et al. 2018

Metals

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“…At the same time, there is a decrease in ductility from 30 to 20%. However, all the alloys exhibited better ductility than 13.5% tensile elongation reported [5] for hot-rolled Nb free steel with similar Al and C content. The strain hardening exponent observed in the present work is ~ 0.15 (Table 4).…”

Section: Discussionmentioning

confidence: 72%

“…Further, they may also have potential defense applications [12]. We have earlier reported properties of Fe-7wt.%Al alloys with carbon addition [5,7].…”

Section: Introductionmentioning

confidence: 99%

“…The density of steel can be reduced by the addition of aluminum [1][2][3][4]. Each wt.% addition of Al gives about 40 MPa increase in strength by solid solution strengthening [1][2][3][4][5] and a density reduction of about 1.5% [3][4][5][6][7]. Aluminum addition also leads to an improved corrosion resistance [1,8].…”

Section: Introductionmentioning

confidence: 99%

“…Aluminum addition also leads to an improved corrosion resistance [1,8]. Because of their low-density, high specific strength, and good corrosion resistance, these steels are considered potential structural materials in thermal power plants and petrochemical industry [1][2][3][4][5][6][7][8][9][10][11][12][13]. Reducing the weight of an automobile by 10% can hike the fuel economy by 6-8%, and therefore, these materials have applications in the automotive industry [1-4, 10, 11].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Niobium Addition on Microstructure and Mechanical Properties of Fe–7Al–0.35C Low-Density Steel

Khaple

Prakash

Golla

et al. 2020

Metallogr. Microstruct. Anal.

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The present work reports the effect of niobium addition on a Fe-7wt.%Al-0.35wt.%C-based low-density steel. A hot rolling temperature of 1100 °C was selected to carry out rolling in the intercritical (ferrite + austenite) region. The phases formed on adding Nb were predicted by thermodynamic calculations using ThermoCalc. All the alloys exhibited a significant (20% or more) tensile elongation. Niobium addition also resulted in a significant increase in strength and hardness of the hot-rolled steel. About 80% increase in the yield strength is observed as the Nb content increases from 0.2 to 1.0 wt.%. Nb carbides present at rolling temperature resist grain growth and lead to improved mechanical properties. This study demonstrates the advantages of adding Nb to Fe-Al-C-based low-density steels. Earlier attempts to add Nb to low-density steels resulted in very low ductility. This may be related to their susceptibility to hydrogen embrittlement. Melting of high aluminum lowdensity steels in a controlled atmosphere may lead to a considerable improvement in mechanical properties. Further, it is also important to maintain a high C/Nb ratio to avoid the formation of Laves phases.

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Low-Density Steels

Chen

Rana

2020

High-Performance Ferrous Alloys

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Melting, Processing, and Properties of Disordered Fe-Al and Fe-Al-C Based Alloys

Cited by 19 publications

References 14 publications

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

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

Effect of Niobium Addition on Microstructure and Mechanical Properties of Fe–7Al–0.35C Low-Density Steel

Low-Density Steels

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