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Microstructure and wear behaviour of FeAl-based composites containing in-situ carbides

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Abstract

Iron aluminides containing carbon are promising materials for tribological applications. Because of graphite formation at higher (>20 wt%) Al-contents the addition of carbon to FeAl-based alloys has not been successful. The graphite precipitation may be avoided by addition of Zr or Ti. Dry sliding wear behaviour of FeAl-based alloys containing 1–1.5 wt% carbon with quaternary addition of Ti or Zr has been studied using ball-on-disk wear test. Effect of sliding speeds and applied loads is investigated and correlated with mechanical properties. Wear resistance of FeAl-based alloys is found to be significantly improved on addition of Ti /Zr. This is attributed to the high hardness of alloy carbides. The lower load-bearing capacity of graphite flakes in localized region was found to increase the wear rate of the alloy. The carbides such as Fe 3 AlC 0 . 5 , TiC and ZrC are embedded in the matrix after sliding wear without destruction or delamination. This significantly affects the wear resistance of FeAl-based alloys.

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Acknowledgement

This research has been supported by the Department of Science and Technology, New Delhi, and we are thankful for the financial support.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, IIT Roorkee, Roorkee, 247 667, India

    RAVI KANT, UJJWAL PRAKASH & VIJAYA AGARWALA

  2. Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad, 500 058, India

    V V SATYA PRASAD

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  1. RAVI KANT
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  2. UJJWAL PRAKASH
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Correspondence to RAVI KANT.

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KANT, R., PRAKASH, U., AGARWALA, V. et al. Microstructure and wear behaviour of FeAl-based composites containing in-situ carbides. Bull Mater Sci 39, 1827–1834 (2016). https://doi.org/10.1007/s12034-016-1326-4

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  • DOI: https://doi.org/10.1007/s12034-016-1326-4

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