Abstract
The applicability of dilation data for characterization of heating rate effects on the continuous-heating recrystallization behavior of cold-rolled 1020 (0.2 C, 0.5 Mn wt. %) sheet steel was assessed in both a Gleeble® 3500 and a commercial push-rod dilatometer. Prior to the start of the ferrite-to-austenite transformation, measurements of sample dimension on heating exhibited a change in slope measured by contact dilatometry, which coincided with the start of recrystallization. The degree of the observed slope change depended on degree of cold work, heating rate, and measuring equipment. The specific temperature associated with the slope change was independent of measuring equipment. In contrast, deviations from linearity were not observed for data obtained with the non-contact laser dilatometer. Recrystallization measurements with contact dilatometry appear to be due to recrystallization-induced plasticity, and the significance of this observation is assessed with comparisons between data obtained on the 1020 steel and reported literature data.
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Thomas, L.S., Clarke, K.D., Matlock, D.K. (2016). Contrasting the Use of Contact and Non-Contact Dilatometers to Measure Ferrite Recrystallization in Cold-Rolled Dual-Phase Steel. In: Holm, E.A., et al. Proceedings of the 6th International Conference on Recrystallization and Grain Growth (ReX&GG 2016). Springer, Cham. https://doi.org/10.1007/978-3-319-48770-0_14
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DOI: https://doi.org/10.1007/978-3-319-48770-0_14
Publisher Name: Springer, Cham
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