0386752 - ÚFM 2013 RIV GB eng J - Journal Article
Saada, G. - Kruml, Tomáš
Removal of plastic instabilities by reversal of the applied stress.
Philosophical Magazine. Roč. 93, 1-3 (2013), s. 256-271. ISSN 1478-6435. E-ISSN 1478-6443
Institutional support: RVO:68081723
Keywords : plasticity of metals * Bauschinger effect * Luders band * Portevin–Le Chatelier effect
Subject RIV: JG - Metallurgy
Impact factor: 1.427, year: 2013 ; AIS: 0.696, rok: 2013
DOI: https://doi.org/10.1080/14786435.2012.702232

This paper presents experiments showing that the inversion of the sense of the applied stress on a specimen deformed in tension (respectively compression) results in the removal of mechanical instabilities such as the yield point and the Lu¨ ders band in a ferritic steel or serrations in an Al–Mg alloy. We show that this behaviour is connected neither to the mechanical set-up (tension, torsion, . . . ), nor to the crystal geometry, but to the development of antagonist internal stresses during plastic flow. We develop a multi-domain analysis of the effect of these stresses and emphasize the importance of the analysis of the elastic–plastic transition.
Permanent Link: http://hdl.handle.net/11104/0216450