Determining stress distribution by tension and by compression applied to steel: Special analysis for TRIP steel sheets

Publication date: 5 July 2017
Source:Materials & Design, Volume 125
Author(s): A. Martínez, V. Miguel, J. Coello, M.C. Manjabacas
For steel, a symmetric distribution of stresses for compression and tension is usually proposed, but it is unclear whether this hypothesis can be applied to materials such as transformation-induced by plasticity (TRIP) steels. The mechanical behavior of TRIP steels depends on the martensitic transformation of part of the retained austenite in the microstructure. The volume of created martensite might depend on the type of mechanical system that leads to plastic deformation. Designing a sufficiently accurate test to probe the possible differences between tension and compression is very difficult for metallic sheets. In this work, several procedures, based on tension and compression tests were designed to verify the real behavior of steel, including sheets. The stack disc compression has proved to be a valid method for determining the compressive behavior of steels. Tensile and compressive curves for the TRIP steels herein considered, a multiphase TRIP and an austenitic stainless, were found to be not coincident. The effects found in both steels were opposite and their specific responses were quantified for large deformations.

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