Microstructure-Based Modelling and Digital Image Correlation Measurement of (Residual) Strain Fields in Austenitic Stainless Steel 316L During Tension Loading

The present work aims to compare the residual strain fields of the austenitic stainless steel 316L samples under specific loading conditions, obtained by different techniques. Experimentally, Digital Image Correlation (DIC) technique is used to track the (residual) strain maps during the specimen loading. Microstructure-based Finite Element (FE) models based on two different approaches for the material behavior (Crystal Plasticity (CP) and SNF) provide the numerical results. The quality of the outcomes reinforces the use of a combination of these techniques to study the residual strain locations in the microstructure, as well as its evolution during the deformation process. Whereas the results based on CP and SNF showed good agreement, some minor differences between calculated and measured (DIC) strains could be observed.