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Embrittlement of Armco iron by indium at high temperatures

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Abstract

We determined the relative elongation (δ) and ultimate strength (σu) of hollow Armco iron specimens and Armco iron specimens filled with indium at high temperatures in a vacuum. It was shown that indium embrittles Armco iron in the temperature range 850–950°C. The lowest values of δ were obtained at a temperature of 925°C, where a small amount of the α-phase is observed in the structure of strained specimens. The high-temperature liquid metal embrittlement of Armco iron is caused by an indiummelt-induced decrease in the flow stress, which localizes strains in the α-phase and initiates its premature cracking. On the basis of metallographic investigations, we made the conclusion that corrosion is not responsible for the high-temperature liquid metal embrittlement of Armco iron.

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Authors
  1. I. H. Dmukhovs'ka
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Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, L'viv. Translated from Fiziko-Khimicheskaya Mekhanika Materialov, Vol. 29, No. 6, pp. 41–45, November–December, 1993.

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Dmukhovs'ka, I.H. Embrittlement of Armco iron by indium at high temperatures. Mater Sci 29, 596–599 (1994). https://doi.org/10.1007/BF00561634

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  • DOI: https://doi.org/10.1007/BF00561634

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