Abstract In this work, differences and similarities between bainitic and martensitic structures obtained by isothermal heat treatments such as austempering, quench and partitioning (Q&P) and quench and tempering (Q&T), are investigated by multiple techniques including X-ray diffraction, electron backscatter diffraction, scanning and transmission electron microscopy and atom probe tomography. Results reveal that analogous lath-like ferritic structures with similar austenite content can be achieved by adjusting the isothermal holding temperature. However, certain variability in hardness is recorded, which is consistent with differences on the precipitation state revealed by the nano-scale examination of the structure, and with dissimilar crystallographic size distribution of ferritic grains.

中文翻译：

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检查等温处理的贝氏体和马氏体结构的多尺度复杂性和结晶层次

摘要 在这项工作中，通过 X 射线衍射、电子背散射衍射等多种技术研究了通过等温热处理获得的贝氏体和马氏体组织之间的差异和相似之处，例如奥氏体淬火、淬火和分配 (Q&P) 和淬火和回火 (Q&T)。 ，扫描和透射电子显微镜和原子探针断层扫描。结果表明，通过调节等温保持温度，可以获得具有相似奥氏体含量的类似板条状铁素体组织。然而，记录了硬度的某些变化，这与通过纳米级结构检查揭示的析出状态的差异以及铁素体晶粒的不同晶体尺寸分布是一致的。