MECHANICAL PROPERTIES AND FRACTOGRAPHIC ANALYSIS OF HIGH MANGANESE STEELS AFTER DYNAMIC DEFORMATION TESTS

作者：Jablonska M B^*

来源：Archives of Metallurgy and Materials, 2014, 59(3): 1193-1197.

DOI：10.2478/amm-2014-0207

• high manganese steels
• dynamic deformation test
• strain rate
• fracture

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 5x10(2)divided by 3.5x10(3) s(-1). It was found that the both studied steels exhibit a high sensitivity R-m to the strain rate. With increasing the strain rate from 5x10(2) to 3.5x10(3) s(-1) 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.

• 出版日期2014