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首页> 外文期刊>日本金属学会誌 >Observations of Prior Austenite Grain Boundaries and Carbides in the Same Area of Tempered Martensite in Medium-Carbon Steel by Atomic Force Microscopy
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Observations of Prior Austenite Grain Boundaries and Carbides in the Same Area of Tempered Martensite in Medium-Carbon Steel by Atomic Force Microscopy

机译：原子力显微镜观察中碳钢中回火马氏体相同区域中原奥氏体的晶界和碳化物

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摘要

Microstructures of JIS-SCM440 steel tempered at 723K were observed on an electropolished and a picric-acid etched sur- faces by atomic force microscopy (AFM). At first, AFM image was taken on an electropolished surface. Carbides and blocks were clearly distinguished on the image, because the electropolishing rate depends on the crystal phase and its surface orientation. However, prior austenite grain boundaries could not be completely recognized. Secondly, AFM image was taken in the same area On a picric-acid etched surface. Prior austenite grain boundaries were observed, because the boundaries are preferentially etched.
机译：通过原子力显微镜（AFM）在电抛光和苦味酸腐蚀的表面上观察到723K回火的JIS-SCM440钢的显微组织。首先，在电抛光表面上拍摄AFM图像。由于电抛光速率取决于晶相及其表面取向，因此在图像上可以清楚地区分碳化物和块。但是，先前的奥氏体晶界无法完全识别。其次，在苦味酸蚀刻的表面上的相同区域中拍摄AFM图像。观察到先前的奥氏体晶粒边界，因为该边界被优先蚀刻。

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