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Influence of titanium addition on the microstructure of the novel ferrous-based stainless steel |
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| Authors: | Chia-Cheng Lin Li-Hsiang Lin Jing-Ming Hung Yung-Hsun Shih Ching-Zong Wu Keng-Liang Ou Chih-Yeh Chao |
| Affiliation: | a Shin Kong Wu-Ho-Su Memorial Hospital, Taipei 110, Taiwan b Research Center for Biomedical Devices, Taipei Medical University, Taipei 110, Taiwan c Department of Dentistry, Taipei Medical University Hospital, Taipei 110, Taiwan d School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan e Dental Department of Wan-Fang Hospital, Taipei Medical University, Taipei 110, Taiwan f Research Center for Biomedical Implants and Microsurgery Devices, Taipei Medical University, Taipei 110, Taiwan g Graduate Institute of Biomedical Materials and Engineering, Taipei Medical University, Taipei 110, Taiwan h Department of Mechanical Engineering, Pingtung University of Science and Technology, PingTung 912, Taiwan |
| Abstract: | The microstructural characteristics of the Fe-9Al-30Mn-1C-5Ti (wt.%) alloy were determined by scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectrometry. The microstructure of the alloy was essentially a mixture of (γ + TiCx + (α + B2 + DO3)) phases during solution treatment between 950 °C and 1150 °C. The TiCx carbide had a face-center-cubic structure with a lattice parameter a of 0.432 nm. When the as-quenched alloy was subjected to aging treatment at temperatures of 450-850 °C, the following microstructural transformation occurred: (γ + TiCx + κ + (α + DO3)) → (γ + TiCx + κ + (α + B2 + DO3 + TiCx)) → (γ + TiCx + κ + κ′ + (α + B2 + DO3)) → (γ + TiCx + (α + B2 + DO3)). Addition of Ti promotes the formation of the α phase at high temperatures. |
| Keywords: | Fe-Al-Mn-C-Ti alloy TiCx carbide Microstructure Phase transformation |
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