Hot Deformation Behavior of a New-Generation 980 MPa Grade TRIP Steel for Automobiles

Abstract:

Using a Gleeble 1500 thermo-mechanical simulator, the behavior of the dynamic recrystallization (DRX) of a low-silicon TRIP steel containing phosphorus and vanadium for automobiles is studied systematically. By the analysis of ture stress-strain curves, critical stress(σ_c) and strain(ε_c) are determined at different deformation conditions. The deformation activation energy Q_def is 323 kJ/mol. The ratios of ε_c/ε_p and σ_c/σ_p of the tested TRIP steel are 0.553 and 0.89, respectively. The equation for describing the Zener–Hollomn formula for tested steel is derived. A linear equation between σc, σp, εc, εp and lnZ have been established through regression analysis, respectively.

• Periodical: Advanced Materials Research (Volumes 261-263)
• Pages: 775-779
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.261-263.775
• Online since: May 2011
• Authors: Xiao Ying Hou, Yun Bo Xu, Di Wu
• Keywords: Activation Energy, Dynamic Recrystallization (DRX), Hot Deformation, Phosphorus, TRIP Steel, Vanadium

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