Predicting of the Lüders’ bands in the processing of TH material in computer environment by means of stochastic modeling

Barišić, Branimir; Pepelnjak, Tomaž; Math, Miljenko

doi:10.1016/j.jmatprotec.2007.09.054

Cited by 9 publications

(6 citation statements)

References 27 publications

(24 reference statements)

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“…It has long been proposed that this sensitivity originates from the high carbon content of the steels [60]. Carbon steels allow the easy permeation of hydrogen, which may interact with foreign atoms such as carbon and nitrogen existing in the metal and promote the interaction of all solutes with dislocations [2,61]. A common explanation of the PLC effect for carbon steels is based on reaching a critical strain required to produce a sufficient number of vacancies, that permit carbon diffusion to the dislocation cores, as discussed in depth by Chen et al and others [62][63][64].…”

Section: Plc Mechanismsmentioning

confidence: 99%

The Portevin–Le Chatelier effect: a review of experimental findings

Yılmaz¹

2011

Science and Technology of Advanced Materials

226

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The Portevin-Le Chatelier (PLC) effect manifests itself as an unstable plastic flow during tensile tests of some dilute alloys under certain regimes of strain rate and temperature. The plastic strain becomes localized in the form of bands which move along a specimen gauge in various ways as the PLC effect occurs. Because the localization of strain causes degradation of the inherent structural properties and surface quality of materials, understanding the effect is crucial for the effective use of alloys. The characteristic behaviors of localized strain bands and techniques commonly used to study the PLC effect are summarized in this review. A brief overview of experimental findings, the effect of material properties and test parameters on the PLC effect, and some discussion on the mechanisms of the effect are included. Tests for predicting the early failure of structural materials due to embrittlement induced by the PLC effect are also discussed.

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Section: Plc Mechanismsmentioning

confidence: 99%

The Portevin–Le Chatelier effect: a review of experimental findings

Yılmaz¹

2011

Science and Technology of Advanced Materials

226

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“…The appearance of the Lüders bands presents a problem for the product quality during the forming process [3]. Consequently, mathematical modeling was used in order to predict behavior of the Lüders bands during cold deformation of metallic materials [4]. It is well known that niobium microalloyed steels show inhomogeneous deformations, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The phenomenon of the Lüders bands tends to be mathematically described for different steels [18]. Studies [4,19] used developed models by regression analysis for different influencing parameters in low carbon steel with Lüders bands. Geometrical properties such as length, width and depth of the Lüders bands were examined which appeared on the tinplates during the cold stamping process.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of the Influence Parameters During Formation and Propagation of the Lüders Bands

et al. 2020

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In this study, an analysis of the influence parameters measured by the static tensile test, thermography and digital image correlation was performed during formation and propagation of the Lüders bands. A new approach to the prediction of stresses, maximum temperature changes and strains during the Lüders band formation and propagation is proposed in this paper. Application of the obtained mathematical models of influence parameters gives a clear insight into the behavior of niobium microalloyed steel at the beginning of the plastic flow, which can improve product quality and reduce costs during the forming of microalloyed steels with the appearance of the Lüders bands. The obtained models of influential parameters during formation and propagation of the Lüders bands have been developed by the regression analysis method. The proposed mathematical models showed low deviations of calculated results ranging from 1.34% to 12.37%.The local stress amounts, important in the forming of microalloyed steels since indicating surface roughness and plastic flow possibilities during the Lüders band propagation, are obtained by the mathematical model. It was found that stress amounts increase during the Lüders band propagation in the area behind the Lüders band front. The difference in stress amount between the start of the Lüders band propagation and advanced Lüders band propagation is 25.53 MPa.

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“…Tin is 100% recyclable, so packaging produced with this material can be considered environmentally friendly, with the added advantage of combining ductility with mechanical resistance, which allows packaging to be easily obtained through the stamping process. The use of this material in packaging is further enhanced by the fact that tinplate has good weldability and high resistance to corrosion [14].…”

Section: Introductionmentioning

confidence: 99%

Study of TiAlN PVD Coating on Stamping Dies Used in Tinplate Food Package Production

Fernandes

Silva

Alexandre³

2019

Micromachines

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The food industry is increasingly demanding in terms of the quality and appearance of its product packages. The present study focuses on identifying the main wear mechanisms developed during the stamping process of these packages. During the stamping process, the presence of a tin layer on the surface of the sheet used creates difficulties in the stamping due to the transfer of material from the sheet to the tool, addition of the coefficient of friction, and premature wear of some surfaces of the tool where the contact is more pronounced. In order to understand and avoid these phenomena, a TiAlN coating deposited by a physical vapor deposition (PVD) process was used, which was studied in the laboratory to analyze the evolution of the friction force on the contact and to verify the reaction of the coating on contact with tinplate. Afterwards, the tool was coated and practical tests were performed on the stamping. The obtained results allow confirmation of a significant improvement of the wear behavior of the tool when provided with the coating and also verify that this coating presented better wear resistance than others previously tested in the same working conditions.

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Predicting of the Lüders’ bands in the processing of TH material in computer environment by means of stochastic modeling

Cited by 9 publications

References 27 publications

The Portevin–Le Chatelier effect: a review of experimental findings

The Portevin–Le Chatelier effect: a review of experimental findings

Mathematical Modeling of the Influence Parameters During Formation and Propagation of the Lüders Bands

Study of TiAlN PVD Coating on Stamping Dies Used in Tinplate Food Package Production

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