Abnormal Austenite-Ferrite Transformation Behaviors of Fe-Si:Dilatometric Measurements
来源期刊：材料热处理学报2004年第5期
论文作者：ZHANG Zhe-ping LI Bao-yin ZHAO Kai LIU Yong-Chang
关键词：solid state phase transformation; iron-based alloys; microstructure; dilatometry;
摘 要：The isochronal γ→α transformation of Fe-1Si alloy was measured by high-resolution dilatometry. According to the variation of the ferrite formation rate, an abnormal γ→α phase transformation was recognized, while normal reaction,i.e. one peak continuous reaction, was also detected. The occurrence the one or the other type of γ→α transformation strongly depends on the grain size: the transformation type changes from abnormal to normal with decreasing grain size. In the abnormal transformation process the first stage of the transformation corresponds to the first peaks in the transformation rate, which are not thermally activated.
ZHANG Zhe-ping1，LI Bao-yin1，ZHAO Kai1，LIU Yong-Chang1
(1.College of Materials Science & Engineering, Tianjin University, Tianjin 300072, China)
摘要:The isochronal γ→α transformation of Fe-1Si alloy was measured by high-resolution dilatometry. According to the variation of the ferrite formation rate, an abnormal γ→α phase transformation was recognized, while normal reaction,i.e. one peak continuous reaction, was also detected. The occurrence the one or the other type of γ→α transformation strongly depends on the grain size: the transformation type changes from abnormal to normal with decreasing grain size. In the abnormal transformation process the first stage of the transformation corresponds to the first peaks in the transformation rate, which are not thermally activated.
关键词:solid state phase transformation; iron-based alloys; microstructure; dilatometry;
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