Change on Young's modulus of hipoeutectoide carbon steels with heat treatment
DOI:
https://doi.org/10.3989/revmetalm.2005.v41.iExtra.997Keywords:
Young's modulus, Heat treatment, Carbon steels, UltrasoundAbstract
In previous papers, several hipoeutectoide carbon steels in quenched condition showed values of Young's modulus inferior to values corresponding to tempered condition. In all cases, Young's modulus was measured by ultrasound techniques. In fact, modulus of C22E steel (EN 10083) increases from 209 GPa (quenched condition) up to 211 GPa (tempered to 650 °C); for C45E steel, modulus increases from 199 GPa to 211 GPa (tempered to 500 °C), and for C55E steel Young's modulus varies from 202 GPa to 209 GPa for tempered steel to 650 °C. The present work focuses on the microstructural characterization of these steels at different heat conditions using reflection optical microscopy and also scanning electronic microscopy and the authors propose an explanation of the modulus variation using the behaviour of the dislocations array and their interaction with solute atoms and other dislocations present in steel.
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