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Magnetic investigation of martensite ⇌ austenite transformations in Fe-Ni-Co alloys

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Abstract

The martensite ⇌ austenite transformations were investigated in Fe-Ni-Co alloys containing about 65 wt pct Fe and up to 15 wt pct Co. A change in morphology of martensite from plate-like to lath-type occurred with increasing cobalt content; this change in morphology correlates with the disappearance of the Invar anomaly in the austenite. The martensite-to-austenite reverse transformation differed depending on martensite morphology. Reversion of plate-like martensite was found to occur by simple disintegration of the martensite platelets. Reverse austenite formed from lath-type martensite was not retained when quenched from much aboveA s, with microcracks forming during theM→γ→M transformation.

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Authors and Affiliations

  1. Magneties Department, Westinghouse Research Laboratories, Pittsbargh, Pa.

    D. A. Colling (Physical Metailurgist)

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  1. D. A. Colling
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Colling, D.A. Magnetic investigation of martensite ⇌ austenite transformations in Fe-Ni-Co alloys. Metall Trans 2, 2889–2896 (1971). https://doi.org/10.1007/BF02813268

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  • DOI: https://doi.org/10.1007/BF02813268

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