Failure analysis of DP600 steel during the cross-die test

Ramazani, Ali; Abbasi, Mohammad Hossein; Prahl, Ulrich; Bleck, Wolfgang

doi:10.1016/j.commatsci.2012.01.031

Cited by 65 publications

(29 citation statements)

References 10 publications

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“…Rahmaan et al [25] presented more details about testing procedures, specimens and measurement techniques and Sarraf et al [24] thoroughly described both calibration and fitting procedures. It is worth noting that the parameters for the strain-controlled void nucleation function were derived from Ramazani et al [26] and Butcher et al [27]. Table 1.…”

Section: Resultsmentioning

confidence: 99%

Simulation of electrohydraulic free forming of DP600 sheets using a modified Rousselier damage model

Sarraf

Green

2018

J. Phys.: Conf. Ser.

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Section: Resultsmentioning

confidence: 99%

Simulation of electrohydraulic free forming of DP600 sheets using a modified Rousselier damage model

Sarraf

Green

2018

J. Phys.: Conf. Ser.

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“…predict the flow-stress behavior of each phase in the steel. [11][12][13][14][15]18 The former equation represents the material strengthening due to the carbon content and other alloying elements' carbide precipitation, while the latter is based on the dislocation theory determining the effects of the grain size. 12 The approach can be expressed as Equation (1):…”

Section: Experimental Partmentioning

confidence: 99%

“…For martensite, two constants, 41 and 0.038, were used to define k and L. 11,13,15,18 The second term is the solid-solution strengthening due to the carbon and nitrogen contents. …”

Section: Recentlymentioning

confidence: 99%

“…9,10 Recently, researchers obtained the flow curves of the composite phases using micromechanical modelling based on the RVEs selected from a real microstructure. [11][12][13][14][15][16][17][18][19] The flow behavior of a DP steel mainly depends on the properties of ferrite and martensite and the volume fractions of different phases. As steel has the same chemical composition, when modelling heat-treated steels, the model mainly focuses on the effects of strengthening methods and the grain size on the strength of different phases.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase-transformation behavior and micromechanical properties of a dual-phase steel after chemical modifications

Zhao¹,

Zhao²,

Sun³

et al. 2017

Mater. Tehnol.

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In this work, the phase-transformation behavior and micromechanical properties of a dual-phase steel after chemical modifications were investigated theoretically and experimentally. In particular, the micromechanical behavior of the steel was modeled, based on the effects of the microstructure, phase fractions, local compositions of single phases and their area shapes. The developed model was used for predicting the damage behavior of a specimen. It was demonstrated that the tensile strength increased with the increasing temperature due to an increase in the amount of martensite in the steel, but the hardening behavior of this specimen was affected by the microstructure. Furthermore, the flow curves of the steel under different intercritical temperatures could be well predicted based on the real microstructures. The subsequent simulation results showed that while higher stress concentrated on the martensite, the shear-band appearance strongly depended on the microstructures of the phases. In addition, for the prediction of damage behaviors, the true stress/true strain curves of macroscale simulations showed good agreement with the experiments involving differently heat-treated steels. Keywords: intercritical treatment, steel, micro model V tem delu so teoreti~no in eksperimentalno preiskovali fazne spremembe in mikromehanske lastnosti dvofaznega jekla po kemijskih prilagoditvah. [e posebej je bilo modelirano mikromehansko obna{anje jekla glede na mikrostrukturo, dele`e posameznih faz, lokalno sestavo posameznih faz in njihovo morfologijo. Razviti model je bil uporabljen za napoved po{kodb vzorca. Dokazano je bilo, da se natezna trdnost pove~uje z nara{~ajo~o temperaturo zaradi nara{~anja vsebnosti martenzita v jeklu, vendar je na kaljivost tega vzorca vplivala mikrostruktura. Nadalje je bilo ugotovljeno, da je mo`no krivulje te~enja jekla pri razli~nih interkriti~nih temperaturah dobro napovedati na podlagi dejanskih mikrostruktur. Nadalje so rezultati simulacij pokazali, da so vi{je napetosti koncentrirane na martenzitu in isto~asna prisotnost stri`nih pasov, mo~no odvisne od mikrostruktur posameznih faz. Poleg tega je za napoved po{kodb pomembno, da se prave krivulje napetost-deformacija, dobljene s pomo~jo simulacij na makronivoju, dobro ujemajo z eksperimentalnimi, dobljenimi pri razli~no toplotno obdelanih jeklih.

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“…Chen and Dong [21], for instance, used GTN model coupled with Hill'48 yield criterion to predict the necking and the failure analysis of an anisotropic sheet metal forming. Furthermore, the GTN model has demonstrated that it is able to predict correctly the failure onset in sheet metal forming part [16,22,23].…”

Section: Ductile Damage Modelmentioning

confidence: 99%

Failure analysis based on microvoid growth for sheet metal during uniaxial and biaxial tensile tests

2013

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. Failure analysis based on microvoid growth for sheet metal during uniaxial and biaxial tensile tests. Materials and Design, Elsevier, 2013, vol. 49, pp. 638-646. <10.1016/j.matdes.2013 OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. a b s t r a c tThe aim of the presented investigations is to perform an analysis of fracture and instability during simple and complex load testing by addressing the influence of ductile damage evolution in necking processes. In this context, an improved experimental methodology was developed and successfully used to evaluate localization of deformation during uniaxial and biaxial tensile tests. The biaxial tensile tests are carried out using cruciform specimen loaded using a biaxial testing machine. In this experimental investigation, Stereo-Image Correlation technique has is used to produce the heterogeneous deformations map within the specimen surface. Scanning electron microscope is used to evaluate the fracture mechanism and the micro-voids growth. A finite element model of uniaxial and biaxial tensile tests are developed, where a ductile damage model Gurson-Tvergaard-Needleman (GTN) is used to describe material deformation involving damage evolution. Comparison between the experimental and the simulation results show the accuracy of the finite element model to predict the instability phenomenon. The advanced measurement techniques contribute to understand better the ductile fracture mechanism.

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Failure analysis of DP600 steel during the cross-die test

Cited by 65 publications

References 10 publications

Simulation of electrohydraulic free forming of DP600 sheets using a modified Rousselier damage model

Simulation of electrohydraulic free forming of DP600 sheets using a modified Rousselier damage model

Phase-transformation behavior and micromechanical properties of a dual-phase steel after chemical modifications

Failure analysis based on microvoid growth for sheet metal during uniaxial and biaxial tensile tests

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