The objective of this study was to identify the microstructural mechanisms related to the high strength and ductile behavior of 2139-Al, and how dynamic conditions would affect the overall behavior of this alloy. Three interrelated approaches, which span a spectrum of spatial and temporal scales, were used: (i) The mechanical response was obtained using the split Hopkinson pressure bar, for strain-rates ranging from to . (ii) First principles density functional theory calculations were undertaken to characterize the structure of the interface and to better understand the role played by Ag in promoting the formation of the phase for several interface structures. (iii) A specialized microstructurally based finite element analysis and a dislocation-density based multiple-slip formulation that accounts for an explicit crystallographic and morphological representation of and precipitates and their rational orientation relations were conducted. The predictions from the microstructural finite element model indicated that the precipitates continue to harden and also act as physical barriers that impede the matrix from forming large connected zones of intense plastic strain. As the microstructural FE predictions indicated, and consistent with the experimental observations, the combined effects of and , acting on different crystallographic orientations, enhance the strength and ductility, and reduce the susceptibility of 2139-Al to shear strain localization due to dynamic compressive loads.
Skip Nav Destination
Article navigation
September 2009
Advances In Impact Engineering
Integrated Experimental, Atomistic, and Microstructurally Based Finite Element Investigation of the Dynamic Compressive Behavior of 2139 Aluminum
K. Elkhodary,
K. Elkhodary
Department of Mechanical and Aerospace Engineering,
North Carolina State University
, 2412 Broughton Hall, Box 7910, Raleigh, NC 27695-7910
Search for other works by this author on:
Lipeng Sun,
Lipeng Sun
Department of Materials Science and Engineering,
North Carolina State University
, Raleigh, NC 27587-7907
Search for other works by this author on:
Douglas L. Irving,
Douglas L. Irving
Department of Materials Science and Engineering,
North Carolina State University
, Raleigh, NC 27587-7907
Search for other works by this author on:
Donald W. Brenner,
Donald W. Brenner
Department of Materials Science and Engineering,
North Carolina State University
, Raleigh, NC 27587-7907
Search for other works by this author on:
G. Ravichandran,
G. Ravichandran
Graduate Aeronautical Laboratories,
California Institute of Technology, Aeronautics and Mechanical Engineering
, Mail Stop 105-50, Pasadena, CA 91125
Search for other works by this author on:
M. A. Zikry
M. A. Zikry
Department of Mechanical and Aerospace Engineering,
North Carolina State University
, 2412 Broughton Hall, Box 7910, Raleigh, NC 27695-7910
Search for other works by this author on:
K. Elkhodary
Department of Mechanical and Aerospace Engineering,
North Carolina State University
, 2412 Broughton Hall, Box 7910, Raleigh, NC 27695-7910
Lipeng Sun
Department of Materials Science and Engineering,
North Carolina State University
, Raleigh, NC 27587-7907
Douglas L. Irving
Department of Materials Science and Engineering,
North Carolina State University
, Raleigh, NC 27587-7907
Donald W. Brenner
Department of Materials Science and Engineering,
North Carolina State University
, Raleigh, NC 27587-7907
G. Ravichandran
Graduate Aeronautical Laboratories,
California Institute of Technology, Aeronautics and Mechanical Engineering
, Mail Stop 105-50, Pasadena, CA 91125
M. A. Zikry
Department of Mechanical and Aerospace Engineering,
North Carolina State University
, 2412 Broughton Hall, Box 7910, Raleigh, NC 27695-7910J. Appl. Mech. Sep 2009, 76(5): 051306 (9 pages)
Published Online: June 15, 2009
Article history
Received:
June 5, 2008
Revised:
December 29, 2008
Published:
June 15, 2009
Citation
Elkhodary, K., Sun, L., Irving, D. L., Brenner, D. W., Ravichandran, G., and Zikry, M. A. (June 15, 2009). "Integrated Experimental, Atomistic, and Microstructurally Based Finite Element Investigation of the Dynamic Compressive Behavior of 2139 Aluminum." ASME. J. Appl. Mech. September 2009; 76(5): 051306. https://doi.org/10.1115/1.3129769
Download citation file:
Get Email Alerts
Hamiltonian System-Based Symplectic Framework for Analytical Vibration Analysis of Microplates
J. Appl. Mech (December 2024)
Related Articles
Inelastic Contact Behavior of Crystalline Asperities in rf MEMS Devices
J. Eng. Mater. Technol (January,2009)
Dislocation Density and Grain Size Evolution in the Machining of Al6061-T6 Alloys
J. Manuf. Sci. Eng (August,2014)
Spatially Resolved Characterization of Geometrically Necessary Dislocation Dependent Deformation in Microscale Laser Shock Peening
J. Manuf. Sci. Eng (August,2009)
Interfacial Structure and Micro and Nano-Mechanical Behavior of Laser-Welded 6061 Aluminum Alloy Blank
J. Eng. Mater. Technol (January,2004)
Related Proceedings Papers
Related Chapters
Data Tabulations
Structural Shear Joints: Analyses, Properties and Design for Repeat Loading
Microstructure Evolution and Physics-Based Modeling
Ultrasonic Welding of Lithium-Ion Batteries
Estimating Resilient Modulus Using Neural Network Models
Intelligent Engineering Systems Through Artificial Neural Networks, Volume 17