An Investigation of Springback in Sheet Metal Forming of High Strength Steels

Slota, Ján; Jurčišin, Miroslav; Spišák, Emil; Sleziak, Tomas

doi:10.4028/www.scientific.net/amm.693.370

Cited by 3 publications

(4 citation statements)

References 6 publications

(8 reference statements)

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“…The influence of strain rate on IF and DP steel’s basic mechanical properties was studied in [ 39 , 40 ]. The finding was that the dynamic loading increased the yield stress more than the ultimate tensile strength for the monitored steels.…”

Section: Resultsmentioning

confidence: 99%

“…CR180IF steel had A = 17.6 and B = 19.0, DP600 steel had A = 19.2 and B = 27.6, and welded material had constant A = 48.0 and B = 47.76. The influence of strain rate on IF and DP steel's basic mechanical properties was studied in [39,40]. The finding was that the dynamic loading increased the yield stress more than the ultimate tensile strength for the monitored steels.…”

Section: Static and Dynamic Tensile Tests And Fracture Surface Analysismentioning

confidence: 99%

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The Performance of CR180IF and DP600 Laser Welded Steel Sheets under Different Strain Rates

et al. 2021

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The presented research background is a car body manufacturer’s request to test the car body’s components welded from dissimilar steel sheets. In view of the vehicle crew’s protection, it is necessary to study the static and dynamic behavior of welded steels. Therefore, the influence of laser welding on the mechanical and dynamical properties, microstructure, microhardness, and welded joint surface roughness of interstitial free CR180IF and dual-phase DP600 steels were investigated. Static tensile tests were carried out by using testing machine Zwick 1387, and dynamic test used rotary hammer machine RSO. Sheet steel was tested at different strain rates ranging from 10−3 to 103 s−1. The laser welds’ microstructure and microhardness were evaluated in the base metal, heat-affected zone, and fusion zone. The comprehensive analysis also included chemical analysis, fracture surface analysis, and roughness measurement. The research results showed that the strain rate had an influence on the mechanical properties of base materials and welded joints. The dynamic loading increases the yield stress more than the ultimate tensile strength for the monitored steels, while the most significant increase was recorded for the welded material.

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Section: Resultsmentioning

confidence: 99%

Section: Static and Dynamic Tensile Tests And Fracture Surface Analysismentioning

confidence: 99%

The Performance of CR180IF and DP600 Laser Welded Steel Sheets under Different Strain Rates

et al. 2021

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“…The change of properties is greater by at higher strain rates (Figure 2) and potentially lead to a change in deformation properties (Figure 4). [16][17][18][19] The dependence of the strength properties on the strain rates for the steels tested in the range from 10 -3 to 10 3 s -1 is described by parametric Equations (2) …”

Section: Resultsmentioning

confidence: 99%

Static and dynamic tensile characteristics of S420 and IF steel sheets

Mihaliková¹,

Girman²,

Líšková³

2016

Mater. Tehnol.

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Two automotive steels were investigated; the Interstitial Free Steel (IF) HSLA (High Strength Low Alloy) and the S420 micro-alloyed steel. The properties of these materials were determined by static 10 -3 s -1 and dynamic 10 3 s -1 rate stress experiments. The plastic properties were determined after static and dynamic tests. The aim of examination of substructures was to determine the distribution of dislocations for various types of stress. The hardness of all the tested materials was higher at a slow rate of deformation. The greater strain hardening of the materials was confirmed by the dislocation distributions. Keywords: IF steel, micro alloyed steel (S420), dynamic tensile test, hardness (HV1), dislocation structure Preiskovani sta bili dve jekli iz avtomobilske industrije: jeklo brez intersticij (IF) HSLA (visko trdnostno nizko legirano jeklo) in mikro-legirano jeklo S420. Namen {tudije je bil dolo~iti spremembe lastnosti teh materialov pri stati~ni hitrosti 10 -3 s -1 in dinami~ni hitrosti 10 3 s -1 obremenjevanja. Plasti~nost je bila dolo~ena na vzorcih po stati~nih in dinami~nih preizkusih. Namen preiskave podstruktur je bil dolo~iti razporeditev dislokacij pri razli~nih vrstah obremenjevanja. Skladno z izmerjenimi vrednostmi in s podatki iz literature je bila trdota vseh preizku{enih materialov vi{ja pri manj{i hitrosti deformacije. Ve~je napetostno utrjevanje materialov je bilo potrjeno z razporeditvijo dislokacij. Klju~ne besede: IF jeklo, mikro legirano jeklo (S420), stati~ni natezni preskus, dinami~ni natezni preskus, trdota (HV1), dislokacijska mikrostruktura

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“…Isotropic hardening models are used for simple applications. They are able to express the proportional expansion of the initial yield surface (Slota et al, 2014;Bruschi et al, 2014). The advantage of these models is that are able to predict hardening behaviour of a high range of different materials and they are widely used due to their simplicity.…”

Section: Introductionmentioning

confidence: 99%

Springback Prediction of Stretching Process using Finite Element Analysis for DP600 Steel Sheet

Slota

Gajdoš

Spišák

et al. 2017

Acta Mechanica Et Automatica

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Springback phenomenon is well predicted for some mild steel materials, but not for steels with higher strength. One of the most used tools to stamping optimization is usage of finite element analysis. In order to accurate describe the real behaviour of the materials for stamping of vehicle panels, the application of proper hardening rule seems to be crucial. Due to higher accuracy of predicted results, high strength steel sheets are usually modelled by means of kinematic or mixed isotropic-kinematic hardening models. In this paper the springback prediction of advanced high strength steel DP600 by numerical simulation was investigated. Through cyclic tension-compression tests, the material characterization has been performed for DP600 steel sheet. Different hardening models (isotropic, kinematic and mixed isotropic-kinematic) used in the simulations were compared with expreriment. The Yoshida-Uemori model succesfully describe the kinematic behaviour of the material and provided more accurate results than others.

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An Investigation of Springback in Sheet Metal Forming of High Strength Steels

Cited by 3 publications

References 6 publications

The Performance of CR180IF and DP600 Laser Welded Steel Sheets under Different Strain Rates

The Performance of CR180IF and DP600 Laser Welded Steel Sheets under Different Strain Rates

Static and dynamic tensile characteristics of S420 and IF steel sheets

Springback Prediction of Stretching Process using Finite Element Analysis for DP600 Steel Sheet

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