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Study of brittle-to-ductile-transition in Pt-aluminide bond coat using micro-tensile testing method

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Abstract

The Brittle-to-ductile-transition-temperature (BDTT) of free-standing Pt-aluminide (PtAl) coating specimens, i.e. stand-alone coating specimens without any substrate, was determined by micro-tensile testing technique. The effect of Pt content, expressed in terms of the thickness of initial electro-deposited Pt layer, on the BDTT of the coating has been evaluated and an empirical correlation drawn. Increase in the electrodeposited Pt layer thickness from nil to 10 μm was found to cause an increase in the BDTT of the coating by about 100°C.

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Authors and Affiliations

  1. Defence Metallurgical Research Laboratory, Hyderabad, 500 058, India

    Md Zafir Alam, B. Srivathsa, S. V. Kamat & D. K. Das

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

    V. Jayaram

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  1. Md Zafir Alam
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  2. B. Srivathsa
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  3. S. V. Kamat
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  4. V. Jayaram
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  5. D. K. Das
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Correspondence to Md Zafir Alam.

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Alam, M.Z., Srivathsa, B., Kamat, S.V. et al. Study of brittle-to-ductile-transition in Pt-aluminide bond coat using micro-tensile testing method. Trans Indian Inst Met 64, 57 (2011). https://doi.org/10.1007/s12666-011-0011-y

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  • DOI: https://doi.org/10.1007/s12666-011-0011-y

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