|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||High Performance Steels
||Low-density Steels: Influence of Al Content and Processing on Microstructure and Properties in Medium-Mn Steels
||Tomas Scuseria, Kelcey Garza, Dean Pierce, Amrinder Gill, Jerry Arnold, Amy Clarke, Kester Clarke
|On-Site Speaker (Planned)
Low-density steels have been proposed as a candidate for increased energy savings and performance for Advanced High Strength Steel (AHSS) in the automotive industry. High Al additions (4-11 wt%) to medium-Mn steels provide mass savings through density reductions, while promoting duplex, ferrite-austenite microstructures with excellent strength-elongation combinations. Concurrently, Al additions stabilize ferrite at hot-rolling temperatures, creating local chemical gradients, in addition to altering austenite stability and work-hardening characteristics, such as Transformation Induced Plasticity (TRIP), Twinning Induced Plasticity (TWIP), or planar slip. The influence of Al additions and processing on microstructure and mechanical properties must be deconvoluted to establish robust alloy design strategies. Experimental Fe-Mn-Al-C based grades with Si and Cr additions were produced into sheets and characterized in the hot-rolled and intercritically annealed conditions. The phase evolution and deformation behavior of duplex microstructures were investigated through dilatometry, tensile testing, and in-situ straining stage with SEM.
||Iron and Steel, Characterization, Mechanical Properties