|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced High-Strength Steels
||Quantitative Analysis of the Precipitate Coarsening in HSLA Steels
||Yiqiang Wang, Clark Samuel, Janik Vit, Richard K. Heenan, Kun Yan, Sridhar Seetharaman, Peter D. Lee
|On-Site Speaker (Planned)
The effect of isothermal ageing time on the growth and coarsening of nano-sized vanadium precipitation in an Fe-0.047C-1.5Mn-0.2V (wt.%) alloys has been investigated by small angle neutron scattering (SANS) and electron microscopy. Quantitative analysis of the precipitation morphology, chemical composition, size, volume fraction and number density was achieved with applied a sufficient magnetic field to the samples. It was found that the V precipitates form rapidly and fit a thin disk shape prediction, reaching their largest number density within 5 minutes, consistent with the interphase precipitation formation in low carbon micro-alloyed steels. The increase in size and volume fraction of precipitates was quantified during isothermal ageing at 700°C. The bulk chemical composition of the precipitation is quite stable during the ageing, as predicted as the magnetic to nuclear scattering ratio is observed with no significant changing.
||Planned: Supplemental Proceedings volume