Mechanical properties and strain-induced phase transformations of some high-strength manganese steels

• Published in: Journal of materials science 1989-10, Vol.24 (10), p.3529-3535
• Main Authors: INEGBENEBOR, A. O, JONES, R. D, RALPH, B
• Format: Article
• Language: English
• Subjects: Applied sciences; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Elasticity. Plasticity; Exact sciences and technology; Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals, semimetals and alloys; Metals. Metallurgy; Physics; Specific materials
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/BF02385735

Work has been carried out to determine the influence of composition and heat treatment on the mechanical properties of some high-strength Mn steels. These steels display impressive mechanical properties in the as-hot-rolled and solution-treated conditions. These impressive mechanical properties have been directly related to the strain-induced phase transformation which was monitored continuously using a magnetic reluctance technique in situ and dynamically during the mechanical tests. Exceptional work-hardening rates were displayed by these steels exceeding that of Hadfield's Mn steel, which is itself known as a highly work-hardening material. They underwent considerable phase transformation during deformation. The results indicated that work-hardening effects probably arise from an increased dislocation density and stacking fault population which have been generated in the austenite/ epsilon matrix during the strain-induced formation of lath martensite which itself also takes part in the work-hardening process. , . 18 ref.--AA