MA岛几何特征在将贝氏体显微组织与成分及加工条件关联方面的不足
The inadequacy of the geometric features of MA islands in relating bainite microstructures to composition and processing conditions
AI总结：
本文统计分析约1500个贝氏体显微组织中约8500个MA岛的面积、紧凑度和长宽比，发现不同成分与热处理下其尺寸和形貌分布几乎不变，证明几何特征难以关联加工条件与显微组织。
摘要：
要在含MA岛的贝氏体钢中获得理想性能，需要理解加工条件和成分对其尺寸与形貌的影响。通常，这种理解是通过研究MA岛的尺寸和形貌随成分及加工条件的变化而获得的。在本研究中，对分散在约1500个贝氏体显微组织中的约8500个MA岛进行了研究，以理解成分和热处理循环对几何特征的影响。本研究所考虑的几何特征包括多边形面积度量、紧凑度和长宽比。对不同成分和加工条件的贝氏体钢中这些特征进行的全面统计分析表明，尽管存在微小变化，但MA岛的尺寸和形貌并未出现特征性变化。换言之，在不同化学成分和热处理的贝氏体钢中，各种形态MA岛的分布几乎相同，从而表明几何特征不足以解释加工条件对显微组织的影响。
英文摘要：
Achieving desired properties in bainite steels with MA islands demands understanding the affect of processing conditions and composition on their size and morphology. Generally, this understanding is gained by studying the change in the size and morphology of the MA islands with composition and the processing conditions. In the present work, around 8500 MA islands dispersed across of approximately 1500 bainite microstructures are investigated to comprehend the influence of composition and heat treatment cycle on the geometric features. The geometric features considered in this study include polygon area metric, compactness and aspect ratio. A thorough statistical analysis of these features across bainite steels of different compositions and processing conditions unravel that, though there are minor changes, no characteristic variation is introduced in the size and morphology of the MA islands. In other words, the distribution of the various forms of MA islands are almost identical in bainite steels of different chemistry and heat treatment, thereby indicating the inadequacy of geometric features in explicating the affect of processing conditions on microstructure.
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