日本金属学会誌

J. Japan Inst. Metals, Vol. 21, No. 4 (1957),
pp. 263-267

Studies on Martensite Transformation in Iron-Nickel Alloys (4th Report). Burst Phenomenon of Umklapp Process

Toshio Honma


Abstract:

The characteristics of Umklapp transformation in Fe-Ni alloy containing 31%Ni were clarified through various experiments. (1) The Umklapp process is characterized by a burst phenomenon. (2) Great kinetic energy accompanied by the umklapp process can make a martensite leaf propagate into a temperature range higher than the usual γ → α transformation temperature in a single crystal with temperature gradient. (3) The 1st burst temperature is scattered statistically in a wide range of temperature. (4) The transformation amounts produced by the 1st burst increases with the degree of supercooling.


(Received 1956/9/28)

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