Martensite
[mahr-tn-zahyt] /ˈmɑr tnˌzaɪt/
noun, Metallurgy.
1.
a metastable microconstituent of any of various forms of carbon steel, produced by undercooling sufficiently below the normal transformation temperature, especially a hard, brittle product of the decomposition of austenite, produced in this way.
/ˈmɑːtɪnˌzaɪt/
noun
1.
a constituent formed in steels by rapid quenching, consisting of a supersaturated solid solution of carbon in iron. It is formed by the breakdown of austenite when the rate of cooling is large enough to prevent pearlite forming
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