Microstructure Changes and Mechanical Properties of Stainless Steel Thin Metal Foils After Tensile Testing

The mechanical properties and changes of microstructure of Austenitic Stainless Steel (ASS) 316L thin metal foils (TMF) were studied through uniaxial tensile tests and SEM-EBSD investigations. The differences in the uniaxial tensile test were observed in SUS 316L with varying grain size (Gs) such as 1.5 um; 3.0 um, and 9.0 um. No. martensitic phase transformation (MPT) occurred in SUS 316 TMF fine grains and coarse grains as indicated in SEM-EBSD results. The microstructure changes were indicated by the change of grain misorientation (GMO) in both SUS 316 TMF fine grains and coarse grains. Furthermore, variations in microstructure were observed in TMF with different Gs.