Microstructure and Mechanical Properties of Hot-Rolled Low-Carbon Medium-Manganese TRIP Steels

Zhen Li; Ai Min Zhao; Di Tang; Ben Hai Li

doi:10.4028/www.scientific.net/AMR.194-196.127

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 194-196Microstructure and Mechanical Properties of...

Microstructure and Mechanical Properties of Hot-Rolled Low-Carbon Medium-Manganese TRIP Steels

Abstract:

Transformation Induced Plasicity (TRIP) steels have attracted a growing interest in recent years due to their high strength and ductility combination.An alternative alloy and processing concept has been studied to evaluate the feasibility of producing low-carbon medium-manganese TRIP Steels. Conventional hot-rolling, and batch annealing processes were simulated with three laboratory heats of varying manganese content. The steels were found to be fully hardenable with conventional hot-strip mill processing and subsequent batch annealing simulations produced significant retained austenite levels. The combination of the prior martensitic microstructure in the as-hot-rolled condition, and austenite created during annealing,resulted in remarkable combinations of strength and ductility. Optimum properties were found when samples were annealed at approximately 630°C. While this treatment maded the tensile strength to 800-1020 MPa, the total elongation increased to between 27 percent and 35 percent. UTS*TE products exceeding 30,000 MPa*% were observed, making these materials attractive for high strength, high ductility applications.

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Periodical:

Advanced Materials Research (Volumes 194-196)

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127-133

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https://doi.org/10.4028/www.scientific.net/AMR.194-196.127

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Online since:

February 2011

Authors:

Zhen Li, Ai Min Zhao, Di Tang, Ben Hai Li

Keywords:

Hot Rolled, Manganese, Martensite, Retained Austenite, TRIP

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