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应用科学学报 ›› 1996, Vol. 14 ›› Issue (1): 97-102.

• 论文 • 上一篇    下一篇

Fe-29wt% Ni合金超细微粒中的马氏体转变

陈允鸿1, 邓桂昌1, 姜玉梅1, 陆怀先2, 李钢3   

  1. 1. 扬州大学;
    2. 南京大学;
    3. 南京师范大学
  • 收稿日期:1994-05-19 修回日期:1995-04-03 出版日期:1996-03-31 发布日期:1996-03-31
  • 作者简介:陈允鸿:副教授,扬州大学师范学院物理系,扬州 225002
  • 基金资助:
    江苏省教委自然科学基金资助项目

MARTENSITIC TRANSFORMATION IN Fe-29WT% NiALLOY ULTRAFINE PARTICLES

CHEN YUNHONG1, JIANG YUMEI1, DENG GUICHANG1, LU HUAIXIAN2, LI GANG3   

  1. 1. Yangzhou University;
    2. Nanjing University;
    3. Nanjing Normal University
  • Received:1994-05-19 Revised:1995-04-03 Online:1996-03-31 Published:1996-03-31

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摘要： 在N2气氛中,用蒸发冷凝法制备了不同平均粒径(12~100nm)的Fe-29wt% Ni合金超细微粒样品.它们是马氏体α'(bcc)和奥氏体γ(fcc)的混合体.每个微粒是一单晶体(bcc或fcc).随样品的平均粒径减小,马氏体体积分数明显增加.在加热过程中,随平均粒径减小,α'→γ逆马氏体转变温度(As和Af)降低,转变温度范围(As-Af)变窄.在冷却过程中(直到77K),没有发现γ→α'马氏体转变.对奥氏体稳定化和马氏体及奥氏体的产生机制,进行了初步的讨论.

关键词: 马氏体转变, 蒸发冷凝, 超细微粒

Abstract: The ultrafine particle samples of Fe-29 wt% Ni alloy with different average diameters(12 to 100nm) are prepared by the evaporation condensation method in the atmosphere of N2.They are a mixture of martensitio α'(bcc) and the austenite γ(fcc).Each individual particle is a single crystal (bcc or fcc). The volume fraction of martensite increases evidently with the decrease of the average diameter. During heating, as the average diameter decreases, the temperature (Aa and Af) for α'-γ reverie martensitic transformation comes down, and the range(As-Af) of the transformation temperature becomes narrower. However, during cooling (up to 77K), we have not found the martensitic transformation. The stabilization of the austenite and the growth mechanism of the martensite and austenite are preliminarily discussed in this Paper too.

Key words: evaporation condensation, ultrafine Particles, martensitic transformation