Detailed analysis of the characteristics a martensite structure inherits from the parent austenite phase requires knowledge of the crystallographic orientation relationship between austenite and martensite, which varies with composition for steel alloys. The orientation relationship is typically observed to exhibit a significant degree of variability, such that measurements from each variant occupy a range of orientations within the transformed pole figure, complicating characterization of the orientation relationship. Here, we present a Bayesian methodology to measure the orientation relationship on martensite EBSD data from four different steels and a binary Fe-Ni alloy. The number of variants that must be exhibited for an accurate measurement as well as robustness to noisy data for this approach are investigated. The Bayesian approach is found to produce results which compare favorably to those from prior work while being more easily automatable.

中文翻译：

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利用贝叶斯推理从EBSD数据表征钢和亚铁合金中马氏体取向关系

对马氏体组织从母体奥氏体相继承的特征的详细分析需要了解奥氏体和马氏体之间的晶体学取向关系，该关系随钢合金的成分而变化。通常观察到取向关系表现出很大程度的可变性，使得来自每个变体的测量值占据了变换极图内的取向范围，这使取向关系的表征复杂化。在这里，我们提出了一种贝叶斯方法，用于测量四种不同钢和二元Fe-Ni合金在马氏体EBSD数据上的取向关系。对于此方法，必须研究为准确测量必须显示的变体数量以及对嘈杂数据的鲁棒性。