|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||N-15: Changes in Microstructures and Mechanical Properties in T92 during Long-term Aging Treatment
||Cheoljun Bae, Rosa Kim, Jongryoul Kim
|On-Site Speaker (Planned)
An understanding of the relationship between mechanical properties and microstructures is essential to assess the stability and performance of the heat resistant steels for an industrial application. In this study, the effect of the microstructural evolution on mechanical properties of T92(SA213) steels was investigated after long-term aging treatment performed in the range 550~650C° up to 15,000 hr. As a result, the lath structure gradually recovered during long-term aging, and the second phases at grain boundary appeared and were grown continuously with increasing the temperature and the time. In addition, the Charpy impact toughness of aged samples was reduced dramatically compared to that of an as-received sample although the tensile properties did not show any significant changes. The drop of the impact energy are considered to be strongly influenced by the formation and growth of Laves phase at grain boundary, and also partly by the precipitation of M23C6 carbides.
||Planned: Supplemental Proceedings volume