Use of Space-Resolved in-Situ High Energy X-ray Diffraction for the Characterization of the Compositional Dependence of the Austenite-to-Ferrite Transformation Kinetics in Steels

Imed-Eddine Benrabah; Hugo Paul Van Landeghem; Frédéric Bonnet; Florence Robaut; Alexis Deschamps

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Use of Space-Resolved in-Situ High Energy X-ray Diffraction for the Characterization of the Compositional Dependence of the Austenite-to-Ferrite Transformation Kinetics in Steels

机译：使用空间分离的原位高能量X射线衍射，以表征奥氏体 - 铁氧体转化动力学在钢中的组成依赖性

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In-situ high energy X-Ray diffraction (HEXRD) was used on compositionally graded steels to study the effect of substitutional elements on ferrite growth kinetics in Fe–C–X and Fe–C–X–Y systems. Two systems were selected to illustrate the applicability of the combinatorial approach in studying such transformations, Fe–C–Mn and Fe–C–Mn–Mo. Comparison between the measured ferrite growth kinetics using HEXRD and the predicted ones using Para-Equilibrium (PE) and Local Equilibrium with Negligible Partitioning (LENP) models indicates that the fractions reached at the stasis of transformation are lower than the predicted ones. Experiments indicated a deviation of measured kinetics from both PE and LENP models when increasing Mn and decreasing Mo (in Fe–C–Mn–Mo system). The large amount of data that can be obtained using this approach can be used for validating existing models describing ferrite growth kinetics.

机译：原位高能量X射线衍射（六磷酸盐）用于组成梯度钢上，以研究Fe-C-X和Fe-C-X-Y系统中的替代元素对铁氧体生长动力学的影响。选择两个系统以说明组合方法在研究这种转化，Fe-C-Mn和Fe-C-Mn-Mo方面的适用性。使用六铁素体和局部平衡和局部平衡与可忽略的分区（LENP）模型的测量铁氧体生长动力学的比较表明在转换的变速器处达到的馏分低于预测的分数。实验表明，在增加Mn和减少Mo（Fe-C-Mn-Mo系统中）时，测量动力学从PE和LENP模型中的测量动力学偏差。可以使用该方法获得的大量数据来验证描述铁氧体生长动力学的现有模型。

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《Quantum Beam Science》 |2020年第1期|共17页
作者
Imed-Eddine Benrabah; Hugo Paul Van Landeghem; Frédéric Bonnet; Florence Robaut; Alexis Deschamps;
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中图分类物理学;
关键词
high energy X-ray diffractioncombinatorial metallurgytransformation kinetics;

机译：高能量X射线衍射组合算子冶金动力学;

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Use of Space-Resolved in-Situ High Energy X-ray Diffraction for the Characterization of the Compositional Dependence of the Austenite-to-Ferrite Transformation Kinetics in Steels

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