Chronowski Mateusz, Opara Jarosław, Straumal Boris, Baretzky Brigitte, Zięba Pawel
Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta St. 25, 30-059 Cracow, Poland.
Łukasiewicz Research Network-Institute for Ferrous Metallurgy, K. Miarki St. 12-14, 44-100 Gliwice, Poland.
Materials (Basel). 2022 May 13;15(10):3525. doi: 10.3390/ma15103525.
This paper studies the go- and -stop movement of a receding reaction front (RF) during a discontinuous dissolution (DD) process. A special simulation procedure was applied for the DD reaction to predict a jerky motion of the RF. The Fe-13.5 at.% Zn alloy was selected in which go- and -stop behaviour was revealed in the form of characteristic lines (called "ghost lines") showing successive positions of receding RF. The results presented for the DD process are quite different from those relevant for the DP reaction at the same Fe-13.5 at.% Zn alloy in terms of go- and -stop motion and movement distance. For the presented case, the go- and -stop periods are relatively long and obtain an order of several dozen seconds, while for the DP reaction, it was only a few seconds. A similar conclusion was formulated after a comparison of the movement distance which, for the DD reaction, is usually longer by 1-2 orders of magnitude. The simulation results of the DD reaction indicate a good agreement with the experimental data presented in the literature for the same dissolution rate. It is necessary to emphasize that the simulation is the only source of data for parameter changes during the -stop period of the DD reaction.
本文研究了在间断溶解（DD）过程中后退反应前沿（RF）的进退运动。采用了一种特殊的模拟程序来模拟DD反应，以预测RF的急动运动。选用了Fe-13.5 at.% Zn合金，其中进退行为以特征线（称为“虚线”）的形式呈现，这些特征线显示了后退RF的连续位置。在进退运动和移动距离方面，DD过程的结果与相同Fe-13.5 at.% Zn合金的动态再结晶（DP）反应的结果有很大不同。对于本文所呈现的情况，进退周期相对较长，可达几十秒，而对于DP反应，仅为几秒。在比较移动距离后得出了类似的结论，对于DD反应，移动距离通常长1 - 2个数量级。DD反应的模拟结果表明，与文献中给出的相同溶解速率下的实验数据吻合良好。需要强调的是，模拟是DD反应停止期参数变化的唯一数据来源。
