Open AccessProduction and characterization of dual-phase steels from an AISI 8620 steel with high Mn content
Author(s) -
Dayi Gilberto Agredo Diaz,
Irma Angarita Moncaleano,
Rodolfo Rodríguez Baracaldo
Publication year - 2021
Publication title -
dyna
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.164
H-Index - 18
eISSN - 2346-2183
pISSN - 0012-7353
DOI - 10.15446/dyna.v88n217.90451
Subject(s) - martensite , materials science , charpy impact test , dual phase steel , ferrite (magnet) , metallurgy , microstructure , ductility (earth science) , bainite , austenite , optical microscope , composite material , scanning electron microscope , creep
Dual phase steels are materials whose microstructure is composed of a ferrite matrix with martensite islands. Ferrite provides excellent ductility, while martensite increases the strength of steel, this provides a special appeal in the automotive industry. The main objective of this research is to obtain dual phase steels from AISI 8620 steel with a high Mn content, performing heat treatments in the intercritical range to obtain martensite percentages of 27, 33, 41, and 48%, respectively. Microstructural characterization is performed using optical microscopy and scanning electron microscopy techniques, the mechanical characterization is carried out using hardness, tension and charpy impact tests. The highest mechanical resistance is achieved in steel with 41% martensite phase, while the highest ductility is given for the material with 27% martensite, a fractographic analysis of all materials allowed to determine that the type of fracture presented is ductile. When the martensite fraction increases, the impact energy exhibits a decreasing behavior, while the hardness behaves in an increasing way.