Creep damage evaluation of P92 steel using nonlinear Lamb waves

P92 martensitic ferritic steels are an attractive material for critical components in power industries due to the excellent creep property. However, these steels are usually susceptible to creep strength degradation during a long service period under the elevated temperature and pressure. Creep damage evaluation is of concern to quantitatively assess the remaining lifespan of the critical components. Nonlinear Lamb waves may offer an efficient method of evaluating these damages for its significant sensitivity to microstructural evolution. The present research focuses on the evaluation of creep damage in P92 martensitic ferritic steel using nonlinear Lamb waves.