Mechanism of training effect in the ferrous shape memory alloys associated with gamma->epsilon martensitic transformation.

铁基形状记忆合金中与γ->ε马氏体相变相关的训练效应机制。

基本信息

  • 批准号:
    02650518
  • 负责人:
  • 金额:
    $ 1.09万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
  • 财政年份:
    1990
  • 资助国家:
    日本
  • 起止时间:
    1990 至 1991
  • 项目状态:
    已结题

项目摘要

gamma->epsilon forward and epsilon->gamma reverse transformations and cyclic transformation in Fe-Mn-Si alloys have been investigated. The main findings are as follows.(1)The change in transformation temperature and microstructure by thermal cycling between room temperature and 573K(above Af)was observed in an Fe-24%Mn-6%Si alloy of which Ms was higher than room temperature. Unlike the case of Fe-24%Mn, Ms hardly changed by the thermal cycling in the Fe-Mn-Si alloy. Moreover, the Fe-Mn-Si alloy showed the good reproducebility of gamma martensite plates, i e., microstructure memory. Furthermore, lattice defects such as dislocations were scarcely observed in the austenite after the thermal cycling. These results strongly suggest that the movement of transformation dislocations is reversible during gamma->epsilon transformations in the Fe-Si-Mn alloy.(2)Microstructural observation of stress-induced epsilon martensite formed by tensile deformation at room temperature was performed in an Fe … More -33%Mn-6%Si alloy of which Ms was just below room temperature. It was confirmed by TEM observation that an epsilon plate formed by the operation of one kind of partial dislocations. A large amount of stacking faults were observed in the untransformed austenite. These stacking faults may act as nucleation sites in the following forward transformation after the annealing above Af. The reversion of stress-induced martensite started at a lower temperature and finished at a higher temperature compared with that of thermally-induced martensite.(3)The change in shape recovery by the addition of thermal cycling between 77K and 873K to the Fe-33%Mn-6%Si alloy was observed. The shape recovery was not improved by the thermal cycling, indicating that the gamma->epsilon cyclic transformation per se was not associated with the improvement of shape recovery by the training treatment.It was concluded from the above results that the role of the training effect is to introduce lattice defects into austenite which act as the nucleation sites in the following transformation. Less
研究了Fe-Mn-Si合金的γ ->正向和ε ->反向转变和循环转变。主要研究结果如下:(1) Ms高于室温的Fe-24%Mn-6%Si合金,通过室温至573K(高于Af)热循环观察到相变温度和显微组织的变化。与Fe-24%Mn不同,Fe-Mn-Si合金的Ms几乎不受热循环的影响。Fe-Mn-Si合金具有良好的γ马氏体再现性,即组织记忆性。此外,在热循环后的奥氏体中几乎没有观察到位错等晶格缺陷。这些结果有力地表明,在Fe-Si-Mn合金的γ -> - epsilon相变过程中,相变位错的运动是可逆的。(2)对Ms略低于室温的Fe…More -33%Mn-6%Si合金室温拉伸变形形成的应力诱导ε马氏体进行了显微组织观察。透射电镜观察证实,一种局部位错作用形成了一个epsilon板。在未转变的奥氏体中观察到大量的层错。在Af以上退火后,应力诱导马氏体的逆转开始于较低的温度,结束于较高的温度。(3)观察了Fe-33%Mn-6%Si合金加入77K ~ 873K热循环后形状恢复的变化。热循环没有改善形状恢复,表明γ ->epsilon循环变换本身与训练处理对形状恢复的改善无关。由上述结果可知,训练效应的作用是在奥氏体中引入晶格缺陷,在随后的相变中充当成核位。少

项目成果

期刊论文数量(7)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Kaneaki Tsuzaki: "Effect of Thermal Cycling on the Martensitic Transformation in an FeーMnーSi Shape Memory Alloy." Materials Transactions,JIM. 33. (1992)
Kaneaki Tsuzaki:“热循环对 Fe-Mn-Si 形状记忆合金马氏体转变的影响”,JIM 33。(1992 年)
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    0
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K. Tsuzaki, Y. Kurokawa and T. Maki: "Formation and reversion of stress-induced epsilon martensite in an Fe-33Mn-6Si shape memory alloy." Materials Transactions, JIM.
K. Tsuzaki、Y. Kurokawa 和 T. Maki:“Fe-33Mn-6Si 形状记忆合金中应力诱导 epsilon 马氏体的形成和回复。”
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    0
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Kaneaki Tsuzaki: "Formation and Reversion of Stress-induced ε Martensite in an Fe-33Mn-6Si Shape Memory Alloy." Materials Transactions,JIM.
Kaneaki Tsuzaki:“Fe-33Mn-6Si 形状记忆合金中应力诱导 ε 马氏体的形成和回复,JIM 材料交易”。
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  • 影响因子:
    0
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K. Tsuzaki, M. Ikegami, Y. Tomota, Y. Kurokawa, W. Nakagawara and T. Maki: "Effect of thermal cycling on the martensitic transformation in an Fe-24Mn-6Si shape memory alloy" Materials Transactions, JIM. 33, No. 3. (1992)
K. Tsuzaki、M. Ikegami、Y. Tomota、Y. Kurokawa、W. Nakakawara 和 T. Maki:“热循环对 Fe-24Mn-6Si 形状记忆合金马氏体转变的影响”Materials Transactions,JIM。
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    0
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K.Tsuzaki: "γ【double arrow】ε cyclic transformation in FeーMn and FeーMnーSi alloys." Metallurgical Transactions,A.
K.Tsuzaki:“Fe-Mn 和 Fe-Mn-Si 合金中的 γ【双箭头】ε 循环转变。”
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    0
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TSUZAKI Kaneaki其他文献

Hydrogen Effects on FCC to HCP Martensitic Transformation in Steel
氢对钢中 FCC 到 HCP 马氏体转变的影响
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    横田尚也;川又透;杉山和正;鈴木茂;但木大介,松本晋太朗,山宮慎,馬騰,今井裕司,平野愛弓,庭野道夫;TSUZAKI Kaneaki
  • 通讯作者:
    TSUZAKI Kaneaki
鉄鋼における水素/マルテンサイト変態相互作用の 定量的・理論的解明と水素利用材料の創製
钢中氢/马氏体转变相互作用的定量和理论阐明以及氢利用材料的创建
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    横田尚也;川又透;杉山和正;鈴木茂;但木大介,松本晋太朗,山宮慎,馬騰,今井裕司,平野愛弓,庭野道夫;TSUZAKI Kaneaki;津﨑兼彰
  • 通讯作者:
    津﨑兼彰

TSUZAKI Kaneaki的其他文献

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{{ truncateString('TSUZAKI Kaneaki', 18)}}的其他基金

Fatigue crack propagation in steels
钢中的疲劳裂纹扩展
  • 批准号:
    16H06365
  • 财政年份:
    2016
  • 资助金额:
    $ 1.09万
  • 项目类别:
    Grant-in-Aid for Scientific Research (S)
A fundamental study on the fabrication of a1800MPa-class ultrahigh strength bolt
1800MPa级超高强度螺栓制造基础研究
  • 批准号:
    20246105
  • 财政年份:
    2008
  • 资助金额:
    $ 1.09万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Research on Phase Transformations and Microstructure Control with Emphasis of Grain Boundary Character of the Matrix
注重基体晶界特性的相变与微观结构控制研究
  • 批准号:
    07650764
  • 财政年份:
    1995
  • 资助金额:
    $ 1.09万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
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