| Abstract: | This article reports the results of an investigation on the effects of austenite on the cryogenic mechanical properties of
Fe-13Mn-3Al steel. The volume fraction of austenite varied from 4% to a maximum of 70%, according to tempering temperature
and time. In the study, the morphology of austenite changed from the interlath type at below 550°C to block type at above
600°C. Yield strength of the alloy decreased linearly with the austenite volume fraction from 1,157 MPa in a 500°C tempered
specimen to 761 MPa in a 650°C tempered one. Tensile strength and elongation tended to increase with the austenite volume
fraction.
Hyung Chul Lee and Hu-Chull Lee are currently faculty members at the School of Materials Science and Engineering at Seoul
National University. |
