Individual phase constitutive properties of a TRIP-assisted QP980 steel from a combined synchrotron X-ray diffraction and crystal plasticity approach
Journal Article
·
· Acta Materialia
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- GM R&D, Warren, MI (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Here, microstructure-based constitutive models for multiphase steels require accurate constitutive properties of the individual phases for component forming and performance simulations. We address this requirement with a combined experimental/theoretical methodology which determines the critical resolved shear stresses and hardening parameters of the constituent phases in QP980, a TRIP assisted steel subject to a two-step quenching and partitioning heat treatment. High energy X-Ray diffraction (HEXRD) from a synchrotron source provided the average lattice strains of the ferrite, martensite, and austenite phases from the measured volume during in situ tensile deformation. The HEXRD data was then input to a computationally efficient, elastic-plastic self-consistent (EPSC) crystal plasticity model which estimated the constitutive parameters of different slip systems for the three phases via a trial-and-error approach. The EPSC-estimated parameters are then input to a finite element crystal plasticity (CPFE) model representing the QP980 tensile sample. The predicted lattice strains and global stress versus strain curves are found to be 8% lower that the EPSC model predicted values and from the HEXRD measurements, respectively. This discrepancy, which is attributed to the stiff secant assumption in the EPSC formulation, is resolved with a second step in which CPFE is used to iteratively refine the EPSC-estimated parameters. Remarkably close agreement is obtained between the theoretically-predicted and experimentally derived flow curve for the QP980 material.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Scientific User Facilities Division
- Grant/Contract Number:
- AC02-06CH11357; AC06-76RL01830; EE0005976
- OSTI ID:
- 1364401
- Alternate ID(s):
- OSTI ID: 1550521
OSTI ID: 1358480
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 132; ISSN 1359-6454
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
The TRIP Effect and Its Application in Cold Formable Sheet Steels: The TRIP Effect and Its Application in Cold Formable
|
journal | August 2017 |
In Situ Local Measurement of Austenite Mechanical Stability and Transformation Behavior in Third-Generation Advanced High-Strength Steels
|
journal | May 2018 |
Strain Rate Effect on Tensile Flow Behavior and Anisotropy of a Medium-Manganese TRIP Steel
|
journal | April 2018 |
Similar Records
Individual phase constitutive properties of a TRIP-assisted QP980 steel from a combined synchrotron X-ray diffraction and crystal plasticity approach
Mechanism-based constitutive modeling of ZEK100 magnesium alloy with crystal plasticity and in-situ HEXRD experiment
Journal Article
·
Thu Jun 01 00:00:00 EDT 2017
· Acta Materialia
·
OSTI ID:1358480
Mechanism-based constitutive modeling of ZEK100 magnesium alloy with crystal plasticity and in-situ HEXRD experiment
Journal Article
·
Fri Sep 14 20:00:00 EDT 2018
· International Journal of Plasticity
·
OSTI ID:1491300