Effect of Mo addition on microstructure, ordering, and room-temperature mechanical properties of Fe-50Al

Date

2018-10-01

Author

Yildirim, Mehmet
Akdeniz, Mahmut Vedat
Mehrabov, Amdulla

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The effects of Mo addition on microstructures, phase relationships, order-disorder phase-transition temperatures and room-temperature mechanical properties of Fe50Al50-nMon alloys (n=1, 3, 5, 7, and 9, mole fraction, %) were investigated after solidification and heat treatment. Structural characterization of the samples was performed via X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry. Room-temperature mechanical properties were investigated by conducting compression and microhardness tests. Mo3Al particles precipitated in all alloys because of the limited solid solubility of Mo in the Fe-Al-based phases. The as-cast Fe50Al50-nMon alloys exhibited brittle behavior with high yield strength and limited fracture strain at room temperature. Compared with the as-cast alloys, all the heat-treated alloys except for the Fe50Al41Mo9 alloy exhibited enhanced mechanical properties at room temperature. The heat-treated Fe50Al43Mo7 alloy exhibited the highest fracture strain and compressive strength of 25.4% and 2.3 GPa, respectively.

Subject Keywords

Iron aluminides, Compressive properties, Order-disorder phase transformation, Microstructure

URI

https://hdl.handle.net/11511/43191

Journal

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA

DOI

https://doi.org/10.1016/s1003-6326(18)64842-3

Collections

Department of Metallurgical and Materials Engineering, Article

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Citation Formats

M. Yildirim, M. V. Akdeniz, and A. Mehrabov, “Effect of Mo addition on microstructure, ordering, and room-temperature mechanical properties of Fe-50Al,” TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, pp. 1970–1979, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43191.