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Electric Resistivity as Phase Volume Fractions Indicator in Metastable Alloys

机译：电阻率作为亚稳合金中相体积分数的指标

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摘要

The microstructure of metastable alloys varies with the thermomechanical history of the material. During a thermomechanical loading, different phases can be present in the material simultaneously. They can be at the origin of macroscopic stress and strain. Consequently, it is important to determine the proportion of each phase to understand the transformation kinetic. However, the techniques usually used to carry out these measurements such as magnetic properties measurements, neutron or X-ray diffraction, are heavy and require a lot of resources. This study, thanks to experimental tests based on electric resistance measurements, permits to determine the volume fraction of the different states present in the material. The study has been realized on a 301 stainless steel in order to take into account the effects of elasticity, transformation and plasticity. Then the volume fraction of the different phases of the material has been determined during transformation with the plasticity presence.
机译：亚稳态合金的微观结构随材料的热机械历史而变化。在热机械加载过程中，材料中可能同时存在不同的相。它们可能是宏观应力和应变的起源。因此，重要的是确定每个相的比例以了解转化动力学。然而，通常用于执行这些测量的技术（例如磁性能测量，中子或X射线衍射）很重，并且需要大量资源。由于基于电阻测量的实验测试，这项研究可以确定材料中不同状态的体积分数。为了考虑到弹性，相变和可塑性的影响，已经对301不锈钢进行了研究。然后，在存在塑性的情况下确定了相变过程中材料不同相的体积分数。

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