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首页> 外文期刊>Metallurgical and Materials Transactions A >Role of Chemical Driving Force in Martensitic Transformations of High-Purity Fe-Cr-Ni Alloys
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Role of Chemical Driving Force in Martensitic Transformations of High-Purity Fe-Cr-Ni Alloys

机译：化学驱动力在高纯度Fe-Cr-Ni合金马氏体相变中的作用

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摘要

The main objective of the present work is to point out the respective roles of chemical driving force and stacking fault energy (SFE) in the occurrence of martensitic transformations in high-purity Fe-Cr-Ni alloys. For this purpose, the transmission electron microscope (TEM), X-ray diffractometer, thermal differential microanalyzer (TDA), and tension test were employed to report M s temperatures, austenite stacking fault energies, and driving forces for the concerned alloys. It was observed that the martensitic transformations in the studied alloys occur through the γ → ε → α′ steps. As a remarkable result, it was shown that a low SFE, if necessary to ε-phase nucleation, is not a sufficient condition for nucleation of α′ phase. In fact, the formation of stable α′ nuclei from α′ embryos occur if the required chemical driving force is provided. Also, an equation was proposed for the kinetics of spontaneous martensitic transformation as a function of driving force.
机译：本工作的主要目的是指出化学驱动力和堆垛层错能（SFE）在高纯度Fe-Cr-Ni合金中发生马氏体相变中的各自作用。为此，采用了透射电子显微镜（TEM），X射线衍射仪，热微分析仪（TDA）和拉伸试验来报告M s 温度，奥氏体堆垛层错能和驱动力。有关的合金。观察到，研究的合金中的马氏体相变是通过γ→ε→α'步骤发生的。作为显着的结果，表明低的SFE，如果对于ε相成核是必要的，则不足以使α′相成核。实际上，如果提供所需的化学驱动力，就会从α'胚形成稳定的α'核。此外，提出了自发马氏体转变动力学随驱动力变化的方程。

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