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Influence of Ti and C on the Solidification Microstructure of Fe-10Al-5Cr Alloys

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Abstract

The influence of Ti and C on the solidification microstructure of Fe-10Al-5Cr (all composition values in weight percent) alloys was examined with solidification modeling and a variety of experimental techniques. Several Fe-10Al-5Cr-Ti-C alloys were fabricated using the arc button melting process and characterized using quantitative image analysis and electron microscopy techniques. The experimental alloys exhibited primary ferrite dendrites with an interdendritic ferrite/TiC eutectic constituent, and the amount of eutectic was affected by the Ti and C concentrations. A liquidus projection and primary solidification paths were calculated for the Fe-10Al-5Cr-Ti-C system in order to estimate the amount of TiC that is expected to form during solidification. The range in the calculated amount of TiC-containing eutectic matched the experimentally measured values reasonably well. The ability to control the amount of TiC that forms during solidification of an Fe-10Al-5Cr-Ti-C-based alloy shows promise for developing corrosion-resistant weld overlay claddings with resistance to hydrogen cracking.

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Acknowledgments

The authors gratefully acknowledge financial support for this research from the Department of Energy Fossil Energy Materials Program under Subcontract 4000039738.

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Authors and Affiliations

  1. Welding Technology Group, Bechtel Marine Propulsion Corporation, West Mifflin, PA, 15102, USA

    K. D. Adams (Senior Engineer)

  2. Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, 18015, USA

    J. N. DuPont (R.D. Stout Distinguished Professor)

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  1. K. D. Adams
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  2. J. N. DuPont
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Correspondence to J. N. DuPont.

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Manuscript submitted June 16, 2009.

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Adams, K.D., DuPont, J.N. Influence of Ti and C on the Solidification Microstructure of Fe-10Al-5Cr Alloys. Metall Mater Trans A 41, 194–201 (2010). https://doi.org/10.1007/s11661-009-0073-1

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