Study of the ordered structures in Fe-Al alloys using dilatometric and calorimetric analysis

Boufenghour, M.; Hayoune, A.; Hamana, D.

doi:10.1023/b:jmsc.0000013876.43031.67

Cited by 7 publications

(1 citation statement)

References 5 publications

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“…Experimental as well as theoretical studies [1][2][3][4][5] suggest that knowledge about degree and type of order and defects in iron aluminides is very important. The knowledge on the phase transformations in these alloys including the information about order-disorder transition is very valid from the point of view of obtained mechanical and physical properties of alloys of the Fe-Al system [6].…”

Section: Introductionmentioning

confidence: 99%

Study of the Structure and Thermal Properties of Intermetallics from Fe-Al System

2016

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Selected alloys from the Fe-Al system are included into a group of materials on a matrix of intermetallic phases, and characteristic properties result from it and they constitute a resultant between properties of superalloys and ceramic materials. These materials are characterized, inter alia, by capacity for operating at elevated temperatures, as well as good strength related properties and resistance to oxidation and corrosion at an increased temperature. In addition, a low cost of alloy components and low density caused by aluminium content are their advantages. The basic reasons limiting application of alloys from Fe-Al system as construction materials are current: their low plasticity at room temperature, propensity for brittle cracking, low resistance at elevated temperature, and insufficient creep resistance. This unfavorable characteristics may be improved by adding to alloys such elements as molybdenum, zirconium, carbon, and boron, reducing the size of grains, increasing their purity, stabilizing the solid solution, and causing changes in phase transition temperatures. These alloys may be successfully manufactured by classic melting accompanied with refinement remelting, and ingot casting. In spite of additions and microadditions, grain refining of the initial structure of ingots manufactured in that way is rarely achieved, mainly because of low castability and high casting contraction. In this work we presented the results of structure analysis and investigations of the dilatometric study alloys on the base Fe-Al system. The alloys were obtained by classic casting technique. The studies were carried out on samples after casting and annealing. The phase transformation and thermal expansion investigations of the alloys from Fe-Al system with concentration of Fe-58Al were presented. The linear thermal expansion α was calculated by standard method. The α coefficient was noticed as a temperature function.

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Section: Introductionmentioning

confidence: 99%

Study of the Structure and Thermal Properties of Intermetallics from Fe-Al System

2016

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Ordering and disordering processes in MA and MM intermetallic iron aluminide powders

et al. 2009

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Erosion, Abrasive, and Friction Wear Behavior of Iron Aluminide Coatings Sprayed by HVOF

et al. 2008

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Iron aluminides have been proposed lately as promising materials for wear applications. Many authors have focused their investigations on the friction behavior of FeAl coatings, emphasizing the role of this intermetallic phase as a new matrix to embed ceramic particles and replace the extensively studied WCCo cermet system for high temperature. However, few of these studies deal with the evaluation of the different tribological properties and their relationship with the coating microstructure. In the present study, the near stoichometric Fe40Al was successfully sprayed by means of high velocity oxy-fuel using different particle size distribution and the tribological behavior was assessed through solid particle erosion, abrasive and dry sliding tests. The wear mechanisms of the deposited coatings are discussed with regard to the observed results. In addition, oxidized samples were tested to evaluate the role of the oxide top layer; also, the powder was previously annealed to produce a coating with an almost fully ordered FeAl structure.

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Study of the ordered structures in Fe-Al alloys using dilatometric and calorimetric analysis

Cited by 7 publications

References 5 publications

Study of the Structure and Thermal Properties of Intermetallics from Fe-Al System

Study of the Structure and Thermal Properties of Intermetallics from Fe-Al System

Ordering and disordering processes in MA and MM intermetallic iron aluminide powders

Erosion, Abrasive, and Friction Wear Behavior of Iron Aluminide Coatings Sprayed by HVOF

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