Effect of Carbon Content on Mechanical Properties of Electroslag Remelted Fe3Al Based Intermetallic Alloys.

Baligidad, R. G.; Prakash, U.; Rao, V. Venkateswara; Rao, P. Krishna; Ballal, N. B.

doi:10.2355/isijinternational.36.1453

Cited by 54 publications

(23 citation statements)

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“…14) They have demonstrated that the addition of carbon, whether in the form of carbide or graphite, tends to improve the machinability of Fe-Al alloys, but the improvement in machinability is not necessarily followed by increase in tensile ductility. These results are not inconsistent with those of Baligidad et al 7) and Pang and Kumar. 11) The difference is considered to be associated with the different carbon content in the alloys used.…”

Section: Effect Of Carbon Addition On Room Temperature Duc-contrasting

confidence: 39%

“…In view of the fact that carbide-matrix interfaces can serve as hydrogen traps in carbon steels, it is envisaged that the poor room temperature ductility of iron aluminide alloys might be improved by the presence of carbides. In fact, beneficial effect of carbon addition on room temperature ductility of Fe 3 Al and FeAl based alloys has been reported by Baligidad et al 7) and Pang and Kumar, 11) respectively. These workers have suggested that the Fe 3 AlC 0.5 carbides in the grain or at grain boundaries provide interfaces that act as hydrogen traps and delay the embrittlement kinetics.…”

Section: Effect Of Carbon Addition On Room Temperature Duc-mentioning

confidence: 95%

“…6) However, recent studies by Baligidad et al have demonstrated that carbon addition to Fe 3 Al alloy results in the improvements of strength, machinability, resistance to environmental embrittlement and creep resistance. [7][8][9] These improvements have been attributed to the formation of perovskite-based Fe 3 AlC 0.5 precipitates in the matrix, which exhibits significant dispersion strengthening. Though Fe 3 AlC 0.5 is a hard and brittle phase, its presence in the alloys does not necessarily lead to the reduction in ductility.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Mechanical and Tribological Properties of High Carbon Fe<SUB>3</SUB>Al and FeAl Intermetallic Alloys

Zhu¹,

Guan²,

Shibata³

et al. 2002

Mater. Trans.

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Fe-15 mass%Al (Fe 3 Al-based) and alloys with various carbon contents (0, 0.5, 1 and 2 mass%) were produced to study the effect of carbon addition on microstructure, mechanical properties and tribological properties of Fe-Al intermetallics. Carbon addition to the Fe-15Al alloy led to the formation of perovskite-type Fe 3 AlC 0.5 carbides in the matrix, while carbon was present in the form of graphite in the Fe-25Al alloy. The formation of Fe 3 AlC 0.5 carbides resulted in a significant strengthening effect on the Fe-15Al alloy, but the strengthening was accompanied by a great loss in ductility. In the Fe-25Al alloy, the strength and ductility were slightly reduced by the formation of graphite. The tribological properties were determined using ball-on-disk sliding wear test in the range of room temperature to 773 K. It was demonstrated that the carbon addition significantly improved the room temperature friction coefficient and wear rate of both Fe-15Al and Fe-25Al alloys, but it tended to decrease the wear rate of these alloys at elevated temperatures. The tribological properties were discussed in terms of microstrutural features and mechanical properties.

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Section: Effect Of Carbon Addition On Room Temperature Duc-contrasting

confidence: 39%

Section: Effect Of Carbon Addition On Room Temperature Duc-mentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Microstructure and Mechanical and Tribological Properties of High Carbon Fe<SUB>3</SUB>Al and FeAl Intermetallic Alloys

Zhu¹,

Guan²,

Shibata³

et al. 2002

Mater. Trans.

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“…High-carbon iron aluminides were not of interest for research, as carbon is known to embrittle these alloys [7]. On the contrary, iron aluminides produced recently by the electroslag remelting process (ESR) were found to improve its strength when carbon is added as an alloying element [8][9][10][11][12]. This is attributed to precipitation hardening by formation of carbides .…”

Section: Introductionmentioning

confidence: 99%

Effect of Al content on oxidation behaviour of ternary Fe–Al–C alloys

2002

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Iron aluminides produced by the electroslag refining technique, having the compositions: (1) Fe-16Al-1C, (2) Fe-10Al-1C, and (3) Fe-8Al-1C were used to investigate the effect of Al on the oxidation behaviour of the Fe-1C-Al system at 700 to 1000 C. Prior to oxidation studies, phase and microstructure of alloys were analysed. The carbide phase, Fe 3 AlC 0.69 , was found to be distributed in the Fe 3 Al matrix in alloy 1 and (Fe-Al) matrix in alloys 2 and 3. The low Al content alloys displayed inversion in the oxidation kinetics below 800 C, while, high Al content alloy displayed inversion phenomena at 1000 C. The mechanism involving inversion in oxidation kinetics was found to be different in the two cases. In the former, it was attributed to the preferential oxidation of Al, while in the latter, to the phase transformation within the Al 2 O 3 . Carbides in the alloy having low Al content showed instability during oxidation.

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“…To improve their fabrication characteristics, electro-slag remelting of air induction melted cast electrodes was used to produce round ingots free of porosity [9,10]. Efforts are also being made to reduce their environmental embrittlement susceptibility and to improve their ductility [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Machining aspects of a high carbon Fe3Al alloy

Chowdhuri¹,

Joshi²,

Rao³

et al. 2004

Journal of Materials Processing Technology

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Iron aluminide alloys containing both ferrous as well as non-ferrous (aluminum) components form unique materials from machining theory and practice point of view. While the cutting tool materials specifically required for their machining are not available, the mechanism of machining of such materials containing ferrous and non-ferrous components has not been adequately investigated. This paper deals with fundamental aspects of chip formation and tool-life in machining of an iron aluminide, Fe 3 Al alloy. Microstructural analysis of chips shows that the interaction of chip and tool in the secondary deformation zone, dependent upon the cutting speed mainly determines the mechanism of chip formation. Results of tool-life testing indicate that thermal softening of tool point combined with abrasion is the predominant tool failure mechanism.

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Effect of Carbon Content on Mechanical Properties of Electroslag Remelted Fe3Al Based Intermetallic Alloys.

Abstract: The effect of carbon content (0.01

Cited by 54 publications

References 0 publications

Microstructure and Mechanical and Tribological Properties of High Carbon Fe<SUB>3</SUB>Al and FeAl Intermetallic Alloys

Microstructure and Mechanical and Tribological Properties of High Carbon Fe<SUB>3</SUB>Al and FeAl Intermetallic Alloys

Effect of Al content on oxidation behaviour of ternary Fe–Al–C alloys

Machining aspects of a high carbon Fe3Al alloy

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