Effects of C and Cr content on high-temperature microstructures of Fe-9Al-30Mn-xC-yCr alloys
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan (China)
- Department of Mechanical Engineering, Pingtung University of Science and Technology, PingTung 912, Taiwan (China)
- Graduate Institute of Biomedical Materials and Engineering, Taipei Medical University, Taipei 110, Taiwan (China)
- Research Center for Biomedical Implants and Microsurgery Devices, Taipei Medical University, Taipei 110, Taiwan (China)
This investigation elucidated the effects of C and Cr content on the high-temperature microstructures of Fe-9Al-30Mn-xC-yCr alloys by means of optical microscopy and transmission electron microscopy. With increasing Cr content, the phase transition sequence within the {alpha} phase was found to be {alpha} + B2 {yields} {alpha} + B2 + DO{sub 3} {yields} {alpha} + DO{sub 3}. And with increasing C content, a {gamma} {yields} ({gamma} + {kappa}) phase transition was observed within the {gamma} phase. The {kappa} phase carbides ((Fe,Mn){sub 3}AlC{sub x}) had an ordered L'1{sub 2}-type structure with lattice parameter a = 0.368 nm and were formed by a spinodal decomposition during quenching. The amounts of Cr{sub 7}C{sub 3} increased with the C and Cr content. Moreover, the Al and Mn content played important roles in expanding the ({alpha} + {gamma}) region. These features have not been previously reported in the Fe-Al-Mn-C-Cr alloy system.
- OSTI ID:
- 22066180
- Journal Information:
- Materials Characterization, Vol. 61, Issue 2; Other Information: Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
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