Troostite

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Troostite

a structural component of steel and cast iron; a highly dispersed variety of pearlite, namely, a eutectoid mixture of ferrite and cementite.

Troostite was named in honor of the French scientist L. J. Troost (1825–1911). It is formed as a result of the decomposition of austenite at temperatures below 600°C. The interlaminar distance in troostite is less than 0.1 micrometer. Troostite is harder than either pearlite or sorbite. The laminar structure of troostite, with a fan-shaped arrangement of the layers, may be observed using electron microscopy. Dark segments of troostite on a background of light fields of martensite are visible under an optical microscope.

REFERENCES

Guliaev, A. P. Termicheskaia obrabotka stali, 2nd ed. Moscow, 1960.
Bunin, K. P., and A. A. Baranov. Metallografia. Moscow, 1970.

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REFERENCES

Troostite