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Evaluation of the reactivity of titanium with mould materials during casting

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Abstract

A methodology for evaluating the reactivity of titanium with mould materials during casting has been developed. Microhardness profiles and analysis of oxygen contamination have provided an index for evaluation of the reactivity of titanium. Microhardness profile delineates two distinct regions, one of which is characterised by a low value of hardness which is invariant with distance. The reaction products are uniformly distributed in the metal in this region. The second is characterised by a sharp decrease in microhardness with distance from the metal-mould interface. It represents a diffusion zone for solutes that dissolve into titanium from the mould. The qualitative profiles for contaminants determined by scanning electron probe microanalyser and secondary ion mass spectroscopy in the as-cast titanium were found to be similar to that of microhardness, implying that microhardness can be considered as an index of the contamination resulting from metal-mould reaction.

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Authors and Affiliations

  1. Defence Metallurgical Research Laboratory, PO Kanchanbagh, 500 258, Hyderabad, India

    R L Saha, T K Nandy, R D K Misra & K T Jacob

  2. Department of Metallurgy, Indian Institute of Science, 560 012, Bangalore, India

    K T Jacob

Authors
  1. R L Saha
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  2. T K Nandy
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  3. R D K Misra
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  4. K T Jacob
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Saha, R.L., Nandy, T.K., Misra, R.D.K. et al. Evaluation of the reactivity of titanium with mould materials during casting. Bull. Mater. Sci. 12, 481–493 (1989). https://doi.org/10.1007/BF02744918

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  • DOI: https://doi.org/10.1007/BF02744918

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