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1. A Model for Calculating Diffraction Elastic Constants
Published: 1/18/2012
Authors: Thomas H Gnaupel-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 ...

2. 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 ...

3. 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 ...

4. 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 Gnaupel-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 ...

5. Diffraction study of the retained austenite content in TRIP steels
Published: 1/19/2011
Authors: Thomas H Gnaupel-Herold, Adam A Creuziger
Abstract: The results of a study of using neutron diffraction for determining the retained austenite content of TRIP steels are presented. The study covers a wide area of materials, deformation modes (uniaxial, biaxial and plane strain), strains, and the retai ...

6. Evolution of Anisotropic Stress Factors with Texture in the Biaxial Deformation of HSLA50 Steel
Published: 1/3/2012
Authors: Thomas H Gnaupel-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 ...

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

8. Report on VAMAS Round Robin of ISO 13067: Microbeam Analysis,Electron Backscatter Diffraction,Measurement of Average Grain Size
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7814
Published: 9/14/2011
Authors: Adam A Creuziger, Mark D Vaudin
Abstract: The authors recently participated in a round robin evaluation of a new ISO document draft, ISO 13067: Microbeam analysis ‹ Electron backscatter diffraction ‹ Measurement of average grain size. This report details the results of the study, some of th ...

9. Texture Evolution in TRIP 590 Steels
Published: 1/3/2012
Authors: Adam A Creuziger, Lin Hu, Thomas H Gnaupel-Herold, A. D. Rollett

10. The Fundamental Relationships Between Grain Orientation, Deformation-Induced Surface Roughness and Strain Localization in an Aluminum Alloy
Published: 9/24/2007
Authors: Mark R Stoudt, Lyle E Levine, Adam A Creuziger, Joseph Bunton Hubbard
Abstract: Polycrystalline AA6022 tensile specimens were cut from 1 mm sheet stock, mechanically polished, and uniaxially strained in-situ under a scanning laser confocal microscope (SLCM) using a sub-sized universal testing apparatus. Prior to deformation, el ...

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