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You searched on: Author: adam creuziger Sorted by: date

Displaying records 1 to 10 of 15 records.
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1. In Situ Structural Characterization of Ageing Kinetics in Aluminum Alloy 2024 across Angstrom-to-Micrometer Length Scales
Published: 6/1/2016
Authors: Fan Zhang, Lyle E Levine, Andrew John Allen, Carelyn E Campbell, Adam A Creuziger, Nataliya Kazantseva, Jan Ilavsky
Abstract: The precipitate structure and precipitation kinetics in an Al-Cu-Mg alloy (AA2024) aged at 190 °C, 208 °C, and 226 °C have been studied using ex situ TEM and in situ synchrotron-based, combined ultra-small angle X-ray scattering, small angle X-ray sc ...

2. Thermally-activated constitutive model including dislocation interactions, aging and recovery for strain path dependence of solid solution strengthened alloys: Application to AA5754-O
Published: 12/1/2015
Authors: Minh Son Pham, Mark A Iadicola, Adam A Creuziger, Lin Hu, Anthony D Rollett
Abstract: A thermally-activated constitutive model is developed based on dislocation interactions, crystallographic orientations and microstructural evolution to describe the elasto-plastic stress-strain behavior during multi-axial loading. The aim is to contr ...

3. Uncertainty in Retained Austenite Measurements Applied to Individual Crystallographic Orientations
Published: 5/6/2015
Authors: Adam A Creuziger, Thomas H. Gnaeupel-Herold
Abstract: A technique to measure the phase volume fraction of an individual orientation and the uncertainty in the measurement is demonstrated in this paper. The technique of complete pole figure averaging was used to assess the phase fraction of retained aust ...

4. Constitutive Modeling based on Evolutionary Multi-junctions of Dislocations
Published: 5/7/2014
Authors: Minh Son Pham, Adam A Creuziger, Mark A Iadicola, Timothy J Foecke, A.D. Rollett
Abstract: A latent hardening model based on the binary junction-induced hardening can effectively describe the plastic anisotropic response. However, this approach still has some descriptive and predictive limitations. Recent findings show that binary junction ...

5. Crystallographic Texture Evolution in 1008 Steel Sheet During Multi-Axial Tensile Strain Paths
Published: 1/7/2014
Authors: Adam A Creuziger, Lin Hu, Thomas H. Gnaeupel-Herold, Anthony D. Rollett
Abstract: This paper considers the crystallographic texture evolution in a 1008 low carbon steel. The texture evolution along uniaxial, plane strain and balanced biaxial strain states were measured. For uniaxial testing, grains tend to rotate such that the {11 ...

6. The Strain Path Dependence of Plastic Deformation Response of AA5754: Experiment and Modeling
Published: 1/6/2014
Authors: Minh Son Pham, Lin Hu, Mark A Iadicola, Adam A Creuziger, Anthony D Rollett
Abstract: This work presents modeling of experiments on a balanced biaxial (BB) pre-strained AA5754 alloy, subsequently reloaded uniaxially along the rolling direction and transverse direction. The material exhibits a complex plastic deformation response durin ...

7. Advanced Biaxial Cruciform Testing at the NIST Center for Automotive Lightweighting
Published: 1/1/2014
Authors: Mark A Iadicola, Adam A Creuziger, Timothy J Foecke
Abstract: Modeling of sheet metal forming operations requires mechanical properties data at very large tensile strains and various biaxial strain paths. Typically these data are developed along strain ratio paths that are linear and monotonic, but actual fo ...

8. Measurement of Uncertainty in Orientation Distribution Function (ODF) Calculations
Published: 10/28/2013
Authors: Adam A Creuziger, Komal Syed, Thomas H. Gnaeupel-Herold

9. A Model for Calculating Diffraction Elastic Constants
Published: 1/18/2012
Authors: Thomas H. Gnaeupel-Herold, Adam A Creuziger, Mark A Iadicola
Abstract: An alternate model is proposed to calculate the diffraction elastic constants from the elastic constants of the single crystal. It is based on the inverse elastic susceptibility and thus it is related to the elastic polarization approach widely known ...

10. Evolution of Anisotropic Stress Factors with Texture in the Biaxial Deformation of HSLA50 Steel
Published: 1/3/2012
Authors: Thomas H. Gnaeupel-Herold, Adam A Creuziger, Mark A Iadicola
Abstract: The effects of crystallographic texture produced by biaxial deformation on the diffraction elastic constants (DEC) are discussed. Predictions of DEC values from established and new models of grain interactions are compared with experimental data. T ...

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