|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||High Performance Steels
||Tempering & Austempering of Double Soaked Medium Manganese Steels
||Alexandra Glover, Cheng Liu, Emmanuel DeMoor, John Speer
|On-Site Speaker (Planned)
The double soaking heat treatment, when applied to a 0.14C 7.17Mn (wt%) medium manganese steel, has been shown to generate a strength ductility combination desired for the third generation of advanced high strength steels. This work builds upon the double soaking heat treatment through the addition of a tempering or austempering step. Microstructures following double soaking and (aus)tempering were shown to contain a combination of retained austenite, athermal or tempered martensite, and blocky or bainitic ferrite. Microstructural characterization utilized X-ray diffraction, dilatometry and transmission Kikuchi diffraction. The resulting mechanical properties and localized deformation behavior were measured using uniaxial tensile tests in conjunction with digital image correlation. The double soaking plus tempering heat treatment was shown to produce an ultimate tensile strength of 1,340 MPa and 28% total elongation, while the double soaking plus austempering heat treatment resulted in an ultimate tensile strength of 1,675 MPa and total elongation of 22%.
||Iron and Steel, Mechanical Properties, Phase Transformations