日本金属学会誌

J. Japan Inst. Metals, Vol. 17, No. 3 (1953),
pp. 144-148

Studies on the Metastable Eutectoid Transformation (Martensite Transformation) of β Phase of Al-Bronze (1st Report)

Saburo Murai and Hidemi Sako


Abstract:

Many results were reported on the martensite transformation Al-bronze, but the theories on the mechanism of this transformation are not yet satisfactorily established. For this reason, to treat the problem of this momentary transformation in a fundamental manner, the writers have considered the factors that govern this transformation. In the present work, phenomena and mechanism of its transformation were re-examined not only by means X-ray analysis, photomicrostructure and specific gravity methods but also by an instantaneous measuring apparatus consisting of a set of magnetic ocillograph and amplifier devised newly. From the results obtained, it was ascertained that martensite transformation of this alloys is necessarily followed by a shear mechanism to some extent and that the process of martensite formation progresses in certain colony at a velocity of 10-2~10-3 second.


(Received 1952/11/11)

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