|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Applications Utilizing Irradiation and Integrated Modeling
||Interphase distribution behavior of oxide nanoparticles triggered by isothermal ferrite transformation in 9Cr ODS steels
||Xiaosheng Zhou, Hao Chen
|On-Site Speaker (Planned)
By performing isothermal ferrite transformation, the interphase distribution of oxide nanoparticles in 9Cr ODS steels is attained for the first time. The ferrite transformation kinetics and resultant microstructure characteristics are examined in detail by dilatometry, EBSD, SEM and TEM measurements. The oxide size, sheet spacing and lattice planes of oxide sheets have been analyzed. The oxide interphase distribution behavior exhibits similarities and difference with the conventional carbide interphase precipitation, and the mobility of ferrite/austenite interphase boundaries is suggested to have a significant effect on the formation of oxide interphase distribution. Two possible mechanisms are proposed to explain the oxide distribution: dissolution-re-precipitation mechanism and phase-boundary dragging particle mechanism.