International audienceThe present investigative work was focused on modeling the effect of through-thickness texture gradients on the global mechanical behavior of a rolled ferritic stainless steel sheet. The material was experimentally characterized according to the needs of the analysis. First, a homogeneous rolled sheet was analytically described, based on Hill's formalism of generalized materials. Then, a heterogeneous sheet was analyzed through two analytic approaches. The predictive capability of the resulting approaches was also proven in relation to the choice of the pseudo-anisotropic coefficients selected from fictitious materials. Finally, the application of a simple method, called continuum mechanics of textured polycrystals, taking into account crystallographic considerations, was adopted. As a result, this method was found to be an effective way to model the mechanical behavior of an anisotropic and heterogeneous sheet, replicating the evolution of experimental yield stress and plastic strain ratio either in terms of evolution or in those of level values. An attempt to estimate the impact of low-texture gradients on the heterogeneity of any industrial metal sheet is also made
This study focuses on the effect of carburization time on the structural and mechanical properties of low carbon XC20 mild steel (C. Wt.% <0.25). The XC20 steel was carburized with activated carbon with a carbon potential Cp1 = 1.1%, at 910 °C at different carburization times of 2, 4 and 6 h. The results obtained show that XC20 steel (non-carburized) has a ferrite-pearlitic structure with a hardness and a Young’s modulus of the order of (150 HV, 26 KN/mm2). After carburization, the structure of the carburized layer is transformed in martensite (Fe γ) in which cementite (Fe3C) is imbricated. The depth of the carburized layer and the amount of carbon on the surface gradually increase with increasing carburization time. In addition, the carburized XC20 steel becomes hard and brittle where the hardness and Young’s modulus have been increased for a high holding time until reaching maximum values (845 HV, 48 KN mm−2) after 6 h of carburization . However, the toughness of XC20 steel has been reduced from 163 to 40 J cm−2.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.