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高解析電子背向繞射在極低碳冷軋鋼片初期再結晶研究的應用

Electron Backscatter Diffraction Study on Early Recrystallization of Ultra-Low Carbon Steel

摘要


本研究探討以高解析電子背向繞射技術,分析極低碳鋼片冷軋70%之後的顯微組織與集合組織特徵,以及在初期再結晶時,再結晶成核位置的顯微組織與集合組織特徵,以期建立冷軋組織與再結晶組織的相關性,和澄清再結晶過程中集合組織的演化機構。本研究提出利用變形晶粒內的結晶方位差角(misorientation)作為軋延組織分類的方法。由不同方位差角分類下的冷軋組織,對應再結晶初始階段的集合組織發展做詳細的討論。本研究結果發現,冷軋顯微組織中的高方位差角的區域與再結晶成核位置與方位皆高度相關;並且在總體的方位分布函數也定性上的相似。

並列摘要


In this study, high resolution electron backscatter diffraction (EBSD) technique was used to investigate the microstructure and microtexture of extra low carbon steel at a stage after completing 70% of cold roll. Specific areas in the as-cold-rolled state and in the partly recrystallized state were analyzed by EBSD. The correlation between recrystallized grains and deformed grains was established. The areas having high KAM (kernel average misorientation) values (>10°) in the deformed state exhibit a similar orientation distribution to that of the recrystallized sample. The high-KAM areas have a high probability to be the recrystallized nuclei.

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