Analysis of Hot- and Cold-Rolled Loads in Medium-Mn TRIP Steels
The purpose of this work is to investigate the hot- and cold-rolling requirements to produce third-generation advanced high-strength steels (AHSS). Therefore, five medium-Mn (10 to 14 wt pct Mn) alloys that exhibit transformation-induced plasticity (TRIP) were compared to a commercially produced grade of AISI 1018 using hot- and cold-rolling experiments. Experimental data collected from a STANAT instrumented rolling mill was utilized to measure force and torque during hot- and cold-rolling. Experimental data were processed by a 1D analytical model, based on Orowan model, to determine rolling pressure. It was determined that pressures required to hot-roll TRIP alloys are 1.4 to 1.8 times greater than pressures for rolling AISI 1018 steel. Cold rolling of the medium-Mn TRIP steels was found to be 1.5 to 2.8 times greater than the AISI 1018 steel. Mechanical and microstructural characterization was also performed and the variation in rolling pressure was related to the starting microstructural constituents, and alloys containing greater starting quantities of ε-martensite in the microstructure had higher flow stresses at equivalent rolling strains during cold rolling.
M. F. Buchely et al., "Analysis of Hot- and Cold-Rolled Loads in Medium-Mn TRIP Steels," Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, vol. 50, no. 3, pp. 1180 - 1192, Springer Boston, Jun 2019.
The definitive version is available at https://doi.org/10.1007/s11663-019-01566-4
Materials Science and Engineering
Peaslee Steel Manufacturing Research Center
Keywords and Phrases
Cold rolled steel; Cold rolling; Elasticity; Hot rolled steel; Manganese alloys; Manganese steel; Metal cladding; Microalloyed steel; Plasticity; Rolling resistance; Steel sheet; Structural design; Transformation Induced Plasticity steel, Epsilon martensite; Force and torques; Micro-structural; Micro-structural characterization; Mn trip steels; Rolling pressure; Third generation; Transformation induced plasticity, High strength steel
International Standard Serial Number (ISSN)
Article - Journal
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01 Jun 2019