Bending of dual-phase (DP) steels has introduced new issues concerning the analysis by finite element (FE) modelling. During the investigation of the microstructure of a DP1000 steel, it is found that there is crack formation at lower bending angles and elongations than would be expected based on the forming limit curves (FLCs).Author: F. HollenbergPublish Year: 2015sp.info Ductile fracture of dual-phase steel sheets under bendingof deformation, in particular bending, and material microstructure on ductile fracture of dual-phase (DP) advanced high strength steel (AHSS) sheets. DP steel sheets with yield and tensile strengths in excess of 300MPa and 600MPa, respectively, are one of the most widely soughtsp.info Ductile fracture of dual-phase steel sheets under bending ...Feb 01, 2020 · The objective of this work is to model the effect of length-scales induced by geometry of deformation, in particular bending, and material microstructure on ductile fracture of dual-phase (DP) advanced high strength steel (AHSS) sheets. DP steel sheets with yield and tensile strengths in excess of 300 M P a and 600 M P a, respectively, are one ...Cited by: 9Publish Year: 2020Author: Yu Liu, Dongwei Fan, Shrikant P. Bhat, Ankit Srivastavasp.info (PDF) Bending Performance Improvement of Dual-Phase …Bending Performance Improvement of Dual-Phase Steel With 1000-MPa Tensile Strength Dongwei Fan 1 , Negin Jahangiri 2 , Pallava Kaushik 1 , Howie Pielet 1 and Hyunjo Jun 3Estimated Reading Time: 7 mins
Dual-phase (DP) steels were the first family of high strength automotive sheet steels which manufacturing involved specific phase transformations. Featuring a high balance of strength and ductility (formability), they range in tensile strength (TS) from 450 to 1200 MPa. Their important advantages are very high strain hardening and additional ...sp.info What is the strength of dual phase steel?Dual-phase (DP) steels were the first family of high strength automotive sheet steels which manufacturing involved specific phase transformations. Featuring a high balance of strength and ductility (formability), they range in tensile strength (TS) from 450 to 1200 MPa.See all results for this questionsp.info What are preconditions for welding dual phase steel?The precondition is welding parameters matched to the material. For spot welding of dual-phase steels, the same equipment can be used as for welding unalloyed deep drawing steels. Compared to same-thickness steel grades of lower strength, the welding zone tends to shift toward lower currents.See all results for this questionsp.info How is dual phase and TRIP steel produced?The methods of production of coated dual phase and TRIP steels were provided by Tumuluru (2006a) and are shown schematically in Fig. 3.2. TRIP steel is produced by heating the steel into the intercritical temperature range for annealing so that dissolution of cementite occurs and formation of austenite starts.See all results for this question
Relation between elongation and tensile strength of steels. Dual-phase (DP) steels are composed of ferrite and 5–20% of martensite, and their strength ranges from 500 to 1200 MPa. DP steels have a microstructure of mainly soft ferrite, with islands of hard martensite dispersed throughout.See all results for this questionsp.info Dual-phase steels - Steel manufacturing - thyssenkruppA new class of dual-phase steels made by thyssenkrupp Steel offers around 30 percent higher elongation – compared with conventional grades of this steel family. They bear the designation DH – Ductility High. These materials in the strength classes 600 and 800 MPa are currently being used successfully for series production.sp.info The shear fracture of dual-phase steelsimulation results were compared with companion draw-bend tests for three grades of dual-phase (DP) steel over a range of process conditions. Shear failures were accurately predicted without resorting to damage mechanics, but less satisfactorily for DP 980 steel. Deformation-induced heating has a dominant effect on the occurrence of shear ...sp.info Dual Phase and Multiphase Steels according to VDA 239-100The VDA recommendation for steel flat products for cold forming is finished in the VDA 239-100 material specification. In addition to the areas already presented, this material specification also contains dual-phase, TRIP, complex phase, ferritic-bainitic and martensitic steels. Dual phase steels (DP)
the bendability of complex-phase and dual-phase steels are natural results of the different microstructures. COMPLEX-PHASE STEEL: GOOD BENDING AND PROGRESSIVE BUCKLING BEHAVIOR 0 0 20 40 60 80 100 120 140 1.000 2.000 3.000 4.000 5.000 6.000 7.000 9.000 8.000 10.000 Bending force [N] Bending angle [°] Improved bendability in complex-phase ...sp.info Effect of Carbon Content on V-Bending in High-Strength ...Effect of carbon content on V-bending in high-strength TRIP-aided dual-phase (TDP) steel sheets with polygonal ferrite matrix was investigated for automobile applications. V-bending test was performed on a hydraulic testing machine at a processing speed of 1 mm/min, using a rectangular specimen (50 mm in length, 5 mm in width, 1.2 mm in thickness).Author: Akihiko Nagasaka, Tomohiko Hojo, Masaya Fujita, Takumi Ohashi, Mako Miyasaka, Yuki Shibayama, Eiji A...Publish Year: 2021sp.info Dual Phase Steel Characterization for Tube Bending and ...The behaviour of dual phase steel tubes at 600, 780, and 980 MPa strength grades undergoing rotary draw bending and pressure sequence hydroforming is examined. Bending was performed using three different bend ratios. Principal strains were measured at several locations on each tube. It was found that the level of strain experienced by the tubes was independent of steel grade.Author: Chad Oliver, Randy J. Bowers, Daniel E. GreenPublish Year: 2012sp.info Advanced metallurgical concepts for DP steels with ...Dual phase steel typically available in the tensile strength range of 450 to 980 MPa is widely used in today’s car body manufacturing. Its characteristics of high n-value and good elongation (A80) are connoted with good press formability. However, practical experience
where the force bending has been release, the material try to return to original shape due to elastic recovery [2-4]. In the 1970, Dual-Phase Steel has been developed . DP steels contains some alloy such as silicon or manganese . The terms Dual Phase are because DP contains a ferrite matrix and a second phase of martensite .sp.info Cross-Section Optimization for Axial and Bending Crushes ...Apr 14, 2008 · Cross-Section Optimization for Axial and Bending Crushes Using Dual Phase Steels 2008-01-1125 To achieve optimal axial and bending crush performance using dual phase steels for components designed for crash energy absorption and/or intrusion resistance applications, the cross sections of the components need to be optimized.Cited by: 9Publish Year: 2008Author: Guofei Chen, Ming F. Shi, Tau Tyansp.info Die Science: Guidelines for forming high-strength materialWhen compared with lower-strength materials, high-strength metals usually have the following traits: 1. Less stretchability and lower n values—While this trait usually is typical, some grades of steel, such as dual-phase, have reasonably good initial stretch characteristics. These steel types achieve their overall high strengths through the process of work hardening. The concept behind using dual-phase steel is to retain a reasonabl…See more on thefabricator.comsp.info University of Windsor Scholarship at UWindsortensile testing affected dual phase steel tubes undergoing tube bending. Seven commercial dual phase steels from three different suppliers were compared. It was found that the strength of the steels was mainly dependent on martensite volume fraction, while elongation was influenced by the level of martensite banding.Author: Chad Oliver, Randy J. Bowers, Daniel E. GreenCreated Date: 12/19/2019 5:14:04 AMPublish Year: 2012
This study examined the behaviour of dual phase steel tubes from three different strength grades undergoing rotary draw bending and pressure sequence hydroforming. It was found that the level of strain experienced by the tubes was independent of the steel grade. It was also shown that the same microstructural features that affect strength and elongation in uniaxial tensile testing affected ...Cited by: 3Publish Year: 2010Author: Chad Oliversp.info Effects of Silicon and Manganese Contents on V-Bending …On the other hand, ferrite-martensite dual-phase (MDP0) steel sheet of 900 MPa grade was not able to perform 90-degree V-bending because of initiation of crack on an outer surface. (2) The 0.2C- 2.5Si-1.5Mn, mass% TDP-G steel sheet of 980 MPa grade was able to enable the 90-degree V-bending that considered an amount of springback (θ =Δθ 1 − θAuthor: Akihiko Nagasaka, Tomohiko Hojo, Masaya Fujita, Takumi Ohashi, Mako Miyasaka, Yuki Shibayama, Eiji A...Publish Year: 2021sp.info Evaluation of bending limit curves of aluminium alloy ...Oct 22, 2015 · The increasing trend of bending strain with respect to equivalent pres-strain can be observed in this plot. This is due to the superior strain hardening capability of dual phase steels. Due to the dual microstructure, formability of dual phase steels is higher.Cited by: 6Publish Year: 2017Author: Krishna Kumar Saxena, Ipsita Madhumita Das, Jyoti MukhopadhyayEstimated Reading Time: 13 minssp.info Numerical failure analysis of a stretch-bending test on ...ing a real stretch-bending operation on a dual-phase steel sheet. In order to choose a proper ductile fracture model for the prob-lem at hand, a brief review of the existing models is necessary. From a microscopic point of view, the basic mechanism of ductileAuthor: Meng LuoCreated Date: 8/26/2010 2:00:08 PM
Apr 20, 2009 · Development of Shear Fracture Criterion for Dual-Phase Steel Stamping. 2009-01-1172. Forming Limit Diagrams (FLD) have been widely and successfully used in sheet metal stamping as a failure criterion to detect localized necking, which is the most common failure mechanism for conventional steels during forming.Cited by: 15Publish Year: 2009Author: Danielle Zeng, Z. Cedric Xia, Hua-Chu Shih, Ming F. Shisp.info Global and High-Resolution Damage Quantification in Dual ...In a variety of modern, multi-phase steels, damage evolves during plastic deformation in the form of the nucleation, growth and coalescence of voids in the microstructure. These microscopic sites play a vital role in the evolution of the materials’ mechanical properties, and therefore the later performance of bent products, even without having yet led to macroscopic cracking. However ...Cited by: 18Publish Year: 2019Author: Rickmer Meya, Carl Kusche, Christian Löbbe, Talal Al-Samman, Sandra Korte-Kerzel, A. Tekkayasp.info Experimental studies into the role of cyclic bending ...Jan 03, 2020 · Continuous-bending-under-tension (CBT) has been conceived as a mechanical test or a forming process imparting cyclic bending during stretching of a metallic sheet or strip in order to increase its elongation to fracture (ETF) relative to simple tension (ST). In a recent work, over five times improved ETF by CBT over ST has been reported for a dual-phase (DP) steel DP 1180. This paper evaluates ...Cited by: 6Publish Year: 2020Author: Camille M. Poulin, Sven C. Vogel, Yannis P. Korkolis, Brad L. Kinsey, Marko KnezevicEstimated Reading Time: 9 minssp.info Global and High-Resolution Damage Quantification in Dual ...In the direct SEM-based observations of void evolution in bending samples, all classically known mechanisms and patterns of damage formation in dual-phase steels could be observed. The samples did not yet enter the state of crack formation, which is essential for observing and evaluating single voids and establishing a clear distinction between ...
Ductile fracture of dual-phase steel sheets under bending Yu Liu a , Dongwei Fan b , Shrikant P. Bhat b , Ankit Srivastava a, * a Department of Materials Science and Engineering, Texas A&M ...sp.info University of Windsor Scholarship at UWindsorDual phase (DP) steels, are currently one of the choice automotive materials in terms of potential for weight reduction and cost. More specifically, DP steel tubes are increasingly being used to produce automotive structural components. In this study, tensile tests, …Cited by: 1Publish Year: 2010Author: Chongzhi ChangCreated Date: 12/19/2019 7:14:57 AMsp.info Numerical Evaluation of Surface Roughness Influences on ...Jul 03, 2020 · A dual‐phase steel DP1000 was chosen for this study. It is a widely used steel grade in the automotive industry. The chemical composition is shown in Table 1. For detailed microstructure information of the steel, readers are referred to a previous study of the investigating team.Cited by: 2Publish Year: 2020Author: Peerapon Wechsuwanmanee, Junhe Lian, Wenqi Liu, Sebastian Münstermannsp.info Failure Initiation in Dual-Phase Steel | Scientific.NetThis research work aims to model the failure initiation in dual-phase (DP) steel. A microstructure based approach by means of representative volume elements (RVE) is employed to evaluate the microstructure deformation and the failure initiation on the mesoscale. In order to determine cohesive parameters for martensite cracking, a two level approach has been performed experimentally.Cited by: 14Publish Year: 2013Author: Ali Ramazani, Alexander Schwedt, Anke Aretz, Ulrich Prahl
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