Fig. 4From: EPMA quantification on the chemical composition of retained austenite in a Fe-Mn-Si-C-based multi-phase steelCalibration curves under the different probe currents; a C Kα, b Mn Kα, and c Si Kα. The calculated data were obtained from the intensity in 1 × 10− 7 A probe current by multiplying 3Back to article page