Formation Process of Martensite in AgCd

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概要

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• The present paper gives the results of direct observations on the formation process of the 9R martensite in AgCd. A direct process of the β' to 9R transition is not realized but the transition is the β" to 9R type. The β" phase, formed from the β' one before the martensitic transition, is not any precipitate in the β' one. The martensite is produced as resulte of an enhanced fluctuation of the β" phase: The fluctuation seems to be due to softening of a particular phonon mode. Based on the consideration on the phonon mode to be softened, nature of the martensitic transition in AgCd is discussed. The exact structure of the mertensite is also determined. In addition, a common mode of the martensitic transition in the other β-brass type alloys is briefly suggested.

• 1973-12-05

著者

• Nagasawa Akira

  Department Of Chemistry Faculty Of Science Saitama University

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