The effect of austenite ordering on the martensite transformation in Fe-Pt alloys near the composition Fe3Pt: I. Morphology and transformation characteristics
The effect of austenite ordering on the martensite transformation in Fe-Pt alloys near the composition Fe3Pt: I. Morphology and transformation characteristics
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奥氏体有序化对 Fe3Pt 成分附近 Fe-Pt 合金马氏体相变的影响：一、形貌及相变特征
DOI：
10.1007/bf02649612
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发表时间：
1973
期刊：
影响因子：
--
通讯作者：
C. M. Wayman
中科院分区：
文献类型：
--
作者：
D. Dunne;C. M. Wayman
Fe-Pt合金在接近室温时由fee奥氏体转变为bcc马氏体。奥氏体有序化在降低马氏体相变温度中的作用以前已有报道，但更重要的是，本工作表明，有序化导致可逆的马氏体相变。这种可逆转变的特点已被调查的光学金相，电影，和电阻率测量。它的结论是，在奥氏体有序到适当的程度，马氏体的转变具有所有的热弹性马氏体相变的特征。这种转变在Fe~（25）at. Pt合金是第一个报道的铁基合金的热弹性马氏体转变。目前的实验表明，马氏体“核”不被破坏的转变，并在每个冷却循环在大约相同的温度下重新激活。
Fe-Pt alloys near the composition Fe3Pt transform from fee austenite to bcc martensite at near ambient temperatures. The effect of austenite ordering in depressing theMstemperature has been reported previously, but more importantly the present work shows that ordering leads to a reversible martensitic transformation. The characteristics of this reversible transformation have been investigated by optical metallography, cinematography, and electrical resistivity measurements. It is concluded that in austenite ordered to an appropriate degree, the transformation to martensite possesses all of the characteristics of a thermoelastic martensite transformation. This transformation in ordered Fe~25 at. pct Pt alloys is the first thermoelastic martensite transformation reported for an iron-base alloy. The present experiments indicate that martensite “nuclei” are not destroyed by the transformation, and are reactivated on each cooling cycle at approximately the same temperature.