Mechanical Properties and Fractographic Analysis of High Manganese Steels After Dynamic Deformation Tests

• Published in: Archives of metallurgy and materials Vol. 59; no. 3; pp. 1193 - 1197
• Main Author: Jablonska, MB
• Format: Journal Article
• Language: English
• Published: Warsaw De Gruyter Open 28-10-2014; Polish Academy of Sciences
• Subjects: dynamic deformation test; fracture; high manganese steels; strain rate
• ISSN: 2300-1909; 1733-3490; 2300-1909
• DOI: 10.2478/amm-2014-0207

Since few years many research centres conducting research on the development of high-manganese steels for manufacturing of parts for automotive and railway industry. Some of these steels belong to the group of AHS possessing together with high strength a great plastic elongation, and an ideal uniform work hardening behavior. The article presents the dynamic mechanical properties of two types of high manganese austenitic steel with using a flywheel machine at room temperature with strain rates between 5×10
÷3.5×10
s?
. It was found that the both studied steels exhibit a high sensitivity Rm to the strain rate. With increasing the strain rate from 5×10
to 3.5×10
s?
the hardening dominates the process. The fracture analysis indicate that after dynamic test both steel is characterized by ductile fracture surfaces which indicate good plasticity of investigated steels.