NDLI: Microstructure and Mechanical Properties of Hot- Rolled and Cold-Rolled Medium-Mn TRIP Steels

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Microstructure and Mechanical Properties of Hot- Rolled and Cold-Rolled Medium-Mn TRIP Steels

Content Provider	Semantic Scholar
Author	Liu, Chun-Quan Peng, Qichun Xue, Zhengliang Wang, Shaojin Yang, Chengwei
Copyright Year	2018
Abstract	This study investigated the microstructure and mechanical properties of hot-rolled and cold-rolled medium-Mn transformation-induced plasticity (TRIP) steel. The experimental steel, processed by quenching and tempering (Q & T) heat treatment, exhibited excellent mechanical properties for hot-rolled and Q & T steels (strength of 1050⁻1130 MPa and ductility of 16⁻34%), as well as for cold-rolled and Q & T steels (strength of 878⁻1373 MPa and ductility of 18⁻40%). The mechanical properties obtained after isothermal holding at 775 °C for one hour for cold-rolled/Q & T steel were superior to that of hot-rolled/Q & T steel. Excellent mechanical properties were attributed to the large amount of retained austenite, which produced a discontinuous TRIP effect. Additionally, the differences in mechanical properties correlated with the morphology, stability and content of retained austenite. The cold-rolled sample, quenched from 650 °C (CR 650°C) had extensive TRIP effects in the middle and late stages of the deformation, leading to better mechanical properties. The fracture modes of the hot-rolled sample, quenched from 650 °C, and the cold-rolled sample quenched from 650 °C, were ductile fractures, resulting in excellent ductility.
File Format	PDF HTM / HTML
DOI	10.3390/ma11112242
PubMed reference number	30423887
Journal	Medline
Volume Number	11
Alternate Webpage(s)	https://res.mdpi.com/materials/materials-11-02242/article_deploy/materials-11-02242.pdf?attachment=1&filename=
Alternate Webpage(s)	https://doi.org/10.3390/ma11112242
Journal	Materials
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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