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Acta Metall Sin  1980, Vol. 16 Issue (4): 430-434    DOI:
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THERMODYNAMICS OF THE MARTENSITIC TRANSFORMATION β(γ)→ε
Xu Zuyao (T. Y. Hsu) Shanghai Jiaotong University
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Xu Zuyao (T. Y. Hsu) Shanghai Jiaotong University. THERMODYNAMICS OF THE MARTENSITIC TRANSFORMATION β(γ)→ε. Acta Metall Sin, 1980, 16(4): 430-434.

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Abstract  The stacking-fault energy (SFE) at M_s temperature in Co, Co-14Ni and Co-3.5Cu alloys are given and the nucleation mechanism of ε-martensite is discussedwith respect to their driving forces. The transformation barrier in pole mechanismmight include the SFE of parent phase as well as the interaction energy betweenimperfect dislocations, the driving force pushes the dislocations to glide with aspeed about 0.4 of that of sound that provides the dynamic energy to overcomethe transformation barrier. The Seeger's pole mechanism may be effective for themetals with higher SFE like Co, but inavailable for the Co-14Ni and Co-3.5Cualloys with low SFE in 10~(-1) order of magnitude in which the spontaneous nu-cleation of fault will be applicable.
Received:  18 April 1980     
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https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1980/V16/I4/430

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