Constitutive modeling of quench-hardenable boron steel with tailored properties

Tom K. Eller, Lars Greve, Michael T. Anders, Miloslav Medricky, Ansgar Hatscher, Timo Meinders, Ton van den Boogaard

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

In this work, a material model is presented that predicts the crash-relevant constitutive behavior of quench-hardenable boron steel 22MnB5 as function of material hardness. Three sets of sheets of 22MnB5 are heat treated such that their as-treated microstructures are close to fully martensitic, bainitic and ferritic/pearlitic, respectively. Hardness measurements show that the resulting blanks cover the full scope of possible hardness values, from 165 HV in the ferritic/pearlitic range to 477 HV in the fully hardened state. These three main grades provide the input data for a constitutive model consisting of an extended Swift hardening law and a strain-based fracture criterion. The hardening behavior of each grade is determined using standard tensile tests. For calibration of the fracture criterion, four different fracture samples are used. The developed model predicts the behavior of intermediate hardness grades by piecewise linear interpolation between the hardening and fracture models of the three calibrated grades. A newly developed tapered tensile test specimen is used to validate the model at hand.
Original languageEnglish
Title of host publicationForming Technology Forum
EditorsW. Volk
Place of PublicationHerrsching
Pages1-6
Number of pages6
Publication statusPublished - 19 Sep 2013
Event6th Forming Technology Forum 2013: Modelling of process chains and interfaces for sheet metal forming - Haus der bayerischen Landwirtschaft, Herrsching, Germany
Duration: 19 Sep 201320 Sep 2013

Conference

Conference6th Forming Technology Forum 2013
CountryGermany
CityHerrsching
Period19/09/1320/09/13

Fingerprint

Boron
Hardness
Hardening
Steel
Constitutive models
Interpolation
Calibration
Microstructure

Keywords

  • METIS-300639
  • IR-88570

Cite this

Eller, T. K., Greve, L., Anders, M. T., Medricky, M., Hatscher, A., Meinders, T., & van den Boogaard, T. (2013). Constitutive modeling of quench-hardenable boron steel with tailored properties. In W. Volk (Ed.), Forming Technology Forum (pp. 1-6). Herrsching.
Eller, Tom K. ; Greve, Lars ; Anders, Michael T. ; Medricky, Miloslav ; Hatscher, Ansgar ; Meinders, Timo ; van den Boogaard, Ton. / Constitutive modeling of quench-hardenable boron steel with tailored properties. Forming Technology Forum. editor / W. Volk. Herrsching, 2013. pp. 1-6
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abstract = "In this work, a material model is presented that predicts the crash-relevant constitutive behavior of quench-hardenable boron steel 22MnB5 as function of material hardness. Three sets of sheets of 22MnB5 are heat treated such that their as-treated microstructures are close to fully martensitic, bainitic and ferritic/pearlitic, respectively. Hardness measurements show that the resulting blanks cover the full scope of possible hardness values, from 165 HV in the ferritic/pearlitic range to 477 HV in the fully hardened state. These three main grades provide the input data for a constitutive model consisting of an extended Swift hardening law and a strain-based fracture criterion. The hardening behavior of each grade is determined using standard tensile tests. For calibration of the fracture criterion, four different fracture samples are used. The developed model predicts the behavior of intermediate hardness grades by piecewise linear interpolation between the hardening and fracture models of the three calibrated grades. A newly developed tapered tensile test specimen is used to validate the model at hand.",
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Eller, TK, Greve, L, Anders, MT, Medricky, M, Hatscher, A, Meinders, T & van den Boogaard, T 2013, Constitutive modeling of quench-hardenable boron steel with tailored properties. in W Volk (ed.), Forming Technology Forum. Herrsching, pp. 1-6, 6th Forming Technology Forum 2013, Herrsching, Germany, 19/09/13.

Constitutive modeling of quench-hardenable boron steel with tailored properties. / Eller, Tom K.; Greve, Lars; Anders, Michael T.; Medricky, Miloslav; Hatscher, Ansgar; Meinders, Timo; van den Boogaard, Ton.

Forming Technology Forum. ed. / W. Volk. Herrsching, 2013. p. 1-6.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

TY - GEN

T1 - Constitutive modeling of quench-hardenable boron steel with tailored properties

AU - Eller, Tom K.

AU - Greve, Lars

AU - Anders, Michael T.

AU - Medricky, Miloslav

AU - Hatscher, Ansgar

AU - Meinders, Timo

AU - van den Boogaard, Ton

PY - 2013/9/19

Y1 - 2013/9/19

N2 - In this work, a material model is presented that predicts the crash-relevant constitutive behavior of quench-hardenable boron steel 22MnB5 as function of material hardness. Three sets of sheets of 22MnB5 are heat treated such that their as-treated microstructures are close to fully martensitic, bainitic and ferritic/pearlitic, respectively. Hardness measurements show that the resulting blanks cover the full scope of possible hardness values, from 165 HV in the ferritic/pearlitic range to 477 HV in the fully hardened state. These three main grades provide the input data for a constitutive model consisting of an extended Swift hardening law and a strain-based fracture criterion. The hardening behavior of each grade is determined using standard tensile tests. For calibration of the fracture criterion, four different fracture samples are used. The developed model predicts the behavior of intermediate hardness grades by piecewise linear interpolation between the hardening and fracture models of the three calibrated grades. A newly developed tapered tensile test specimen is used to validate the model at hand.

AB - In this work, a material model is presented that predicts the crash-relevant constitutive behavior of quench-hardenable boron steel 22MnB5 as function of material hardness. Three sets of sheets of 22MnB5 are heat treated such that their as-treated microstructures are close to fully martensitic, bainitic and ferritic/pearlitic, respectively. Hardness measurements show that the resulting blanks cover the full scope of possible hardness values, from 165 HV in the ferritic/pearlitic range to 477 HV in the fully hardened state. These three main grades provide the input data for a constitutive model consisting of an extended Swift hardening law and a strain-based fracture criterion. The hardening behavior of each grade is determined using standard tensile tests. For calibration of the fracture criterion, four different fracture samples are used. The developed model predicts the behavior of intermediate hardness grades by piecewise linear interpolation between the hardening and fracture models of the three calibrated grades. A newly developed tapered tensile test specimen is used to validate the model at hand.

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Eller TK, Greve L, Anders MT, Medricky M, Hatscher A, Meinders T et al. Constitutive modeling of quench-hardenable boron steel with tailored properties. In Volk W, editor, Forming Technology Forum. Herrsching. 2013. p. 1-6