Stress state-dependent mechanics of additively manufactured 304L stainless steel: Part 2 – Characterization and modeling of macroscopic plasticity behavior

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Abstract

A model that describes macroscopic plasticity behavior of additively manufactured 304L stainless steel, in terms of its stress state-dependent microstructural austenite-to-α’ martensite phase transformation is developed. Specifically, a stress state-, texture-, and chemistry-dependent strain-induced martensitic transformation kinetics equation was coupled to an isotropic hardening law in order to explicitly link the macroscopic strain hardening behavior in this material to its microstructural evolution. The plasticity model was implemented into a finite element code, calibrated using experimental data under uniaxial tension, uniaxial compression, pure shear, and validated using experimental data under combined tension and shear loading. The simulated results were in good agreement with the corresponding experimental data for all stress states studied for calibration and validation, demonstrating the predictiveness of the plasticity model developed.

Original languageEnglish (US)
Pages (from-to)824-831
Number of pages8
JournalMaterials Science and Engineering A
Volume743
DOIs
StatePublished - Jan 16 2019

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Stainless Steel
plastic properties
Plasticity
stainless steels
Mechanics
Stainless steel
shear
strain hardening
Microstructural evolution
Martensitic transformations
martensitic transformation
austenite
martensite
Strain hardening
kinetic equations
Martensite
hardening
Austenite
phase transformations
Hardening

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "A model that describes macroscopic plasticity behavior of additively manufactured 304L stainless steel, in terms of its stress state-dependent microstructural austenite-to-α’ martensite phase transformation is developed. Specifically, a stress state-, texture-, and chemistry-dependent strain-induced martensitic transformation kinetics equation was coupled to an isotropic hardening law in order to explicitly link the macroscopic strain hardening behavior in this material to its microstructural evolution. The plasticity model was implemented into a finite element code, calibrated using experimental data under uniaxial tension, uniaxial compression, pure shear, and validated using experimental data under combined tension and shear loading. The simulated results were in good agreement with the corresponding experimental data for all stress states studied for calibration and validation, demonstrating the predictiveness of the plasticity model developed.",
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