|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical and Creep Behavior of Advanced Materials: A SMD Symposium Honoring Prof. K. Linga Murty
||Modelling of the Fracture of Precipitate and Austenitic Matrix Interfaces During Creep
||Liang Huang, Maxime Sauzay
|On-Site Speaker (Planned)
316L(N) is a suitable candidate for structural components of the next generation of nuclear power plants. They will be subjected to high temperature and low stress.
Microscopic observations carried out by SEM-FEG-EBSD and TEM show that cavities nucleate preferentially along the interfaces of precipitates and austenitic matrix.
Crystal elastoviscoplastic laws are used in FE computations to predict the stresses around precipitates in function of creep deformation and temperature. Parameters are given by literature and adjusted using our experimental creep curves (primary and secondary stages only). The calculations take into account the effect of the precipitate geometry and the crystallographic orientations of the neighboring grains. Considering these many microstructure details, the maximum normal stresses along interfaces could reach about 10GPa which is forty times higher than the applied stress. Based on microstructure statistical features and on numerous respective simulations, we can evaluate the cavity nucleation rate depending on stress and temperature.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)