Solidification microstructures and carbides morphology in rapidly solidified Fe-Al-Cr-C alloys

Date

2008-08-01

Author

Akdeniz, Mahmut Vedat
Mehrabov, Amdulla

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

129
views

0
downloads

The combined effects of alloying additions and heat treatment on the evolution and development of the microstructures of Fe3Al-based Fe-Al-Cr-C alloys produced by melt suction processing have been examined. Particular emphasis has been placed on the distribution and morphology of carbides in rapidly solidified Fe3Al-based intermetallics. The results suggest that the formation of intrinsically hard and brittle Fe3AlC and Cr7C3 type carbides depends on the alloying content. These carbides tend to form preferentially along the grain boundaries where more continuous and coarse networks are observed, especially for alloys having higher Cr and C content. These networks are fragmented as a result of heat treatment at 1200 degrees C and subsequent air cooling and quenching.

Subject Keywords

Materials Chemistry, Mechanics of Materials, Condensed Matter Physics, Metals and Alloys, Iron aluminides, Intermetallics, Rapid solidification, Carbides, Microstructures

URI

https://hdl.handle.net/11511/35200

Journal

METALS AND MATERIALS INTERNATIONAL

DOI

https://doi.org/10.3365/met.mat.2008.08.397

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Nanocrystallization in Cu-Zr-Al-Sm Bulk Metallic Glasses Sıkan, Fatih; Yaşar, Bengisu; KALAY, İLKAY (Springer Science and Business Media LLC, 2018-04-01) The effect of rare-earth element (Sm) microalloying on the thermal stability and crystallization kinetics of melt-spun ribbons and suction-cast rods of Zr48Cu38.4Al9.6Sm4 alloy were investigated using differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM), and atom probe tomography (APT). The XRD results of constant heating rate annealing indicated that amorphous Zr48Cu38.4Al9.6Sm4 melt-spun ribbons devitrifies into Cu2Sm at 673 K (400 A degrees C). The sequ...
Electrochemical Reduction of Tungsten Compounds to Produce Tungsten Powder ERDOĞAN, METEHAN; Karakaya, İshak (Springer Science and Business Media LLC, 2010-08-01) The production of tungsten by direct current reduction has been investigated. Experimental studies involved the electrochemical reduction of the solid tungsten compounds tungsten trioxide (WO(3)) and calcium tungstate (CaWO(4)) in the form of an assembled cathode of porous pellets attached to a current collector. Molten calcium chloride and a molten solution of calcium chloride and sodium chloride at eutectic composition, 48 pct mol NaCl, were used as the electrolytes. Reduced samples were characterized by ...
Surfactant-modified multiscale composites for improved tensile fatigue and impact damage sensing Yesil, Sertan; Winkelrnann, Charles; Bayram, Göknur; La Saponara, Valeria (Elsevier BV, 2010-10-25) This paper documents the mechanical and electrical performance of self-sensing conductive polymer composites prepared with a low-cost technique and small hardware, able to considerably improve the dispersion and the surface adhesion of multi-walled carbon nanotubes (CNTs) in epoxy resin with respect to amine-modified CNTs and as-received CNTs. Surface treatment of the CNTs is performed using hexamethylene diamine, or a mix of sulfuric and nitric acid, and one of two surfactants (for the diamine treatment on...
Microstructural evolution and room-temperature mechanical properties of as-cast and heat-treated Fe50Al50-nNbn alloys (n=1, 3, 5, 7, and 9 at%) Yıldırım, Mehmet; Akdeniz, Mahmut Vedat; Mehrabov, Amdulla (2016-05-10) The microstructural evolution and room-temperature mechanical properties of Fe50Al50-nNbn alloys (n=1, 3, 5, 7, and 9 at%) were investigated after solidification and subsequent heat treatment. For all the compositions, the (Fe, Al)(2)Nb Laves phase formed because of the incomplete solid solubility of Nb in the Fe-Al-based phases and tended to develop an eutectic mixture with the Fe-Al-based phase. According to the results of EDS analysis and microstructural investigations, the Nb concentration of the eutect...
Initial crystallization in a nanostructured Al-Sm rare earth alloy Kalay, Yunus Eren; Chumbley, L. S.; Kramer, M. J.; Anderson, I. E. (Elsevier BV, 2010-06-15) The transformation kinetics and microstructural evolution during initial crystallization in highly driven Al(90)Sm(10) were investigated using transmission electron microscopy (TEM). conventional Cu K(alpha) and high-energy synchrotron X-ray diffraction (HEXRD) and differential scanning calorimetry (DSC). The highest cooling rate obtained in this study yielded a high number density of fcc-Al nanocrystals, with sizes on the order of 2-5 nm, embedded in a disordered matrix rich in an Al-Sm medium range order ...

Citation Formats

M. V. Akdeniz and A. Mehrabov, “Solidification microstructures and carbides morphology in rapidly solidified Fe-Al-Cr-C alloys,” METALS AND MATERIALS INTERNATIONAL, pp. 397–402, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35200.