Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties
Abstract
Metal additive manufacturing (AM) allows for the freeform creation of complex parts. However, AM microstructures are highly sensitive to the process parameters used. Resulting microstructures vary significantly from typical metal alloys in grain morphology distributions, defect populations and crystallographic texture. AM microstructures are often anisotropic and possess three-dimensional features. These microstructural features determine the mechanical properties of AM parts. Here, we reproduce three “canonical” AM microstructures from the literature and investigate their mechanical responses. Stochastic volume elements are generated with a kinetic Monte Carlo process simulation. A crystal plasticity-finite element model is then used to simulate plastic deformation of the AM microstructures and a reference equiaxed microstructure. Results demonstrate that AM microstructures possess significant variability in strength and plastic anisotropy compared with conventional equiaxed microstructures.
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Dept. of Computational Materials and Data Science
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Dept. of Fluid and Reactive Processes
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1574438
- Report Number(s):
- SAND-2019-12098J
Journal ID: ISSN 1047-4838; 680146
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- JOM. Journal of the Minerals, Metals & Materials Society
- Additional Journal Information:
- Journal Volume: 72; Journal Issue: 1; Journal ID: ISSN 1047-4838
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; additive manufacturing; crystal plasticity; texture; mechanical properties
Citation Formats
Rodgers, Theron M., Lim, Hojun, and Brown, Judith Alice. Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties. United States: N. p., 2019.
Web. doi:10.1007/s11837-019-03808-x.
Rodgers, Theron M., Lim, Hojun, & Brown, Judith Alice. Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties. United States. doi:10.1007/s11837-019-03808-x.
Rodgers, Theron M., Lim, Hojun, and Brown, Judith Alice. Wed .
"Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties". United States. doi:10.1007/s11837-019-03808-x. https://www.osti.gov/servlets/purl/1574438.
@article{osti_1574438,
title = {Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties},
author = {Rodgers, Theron M. and Lim, Hojun and Brown, Judith Alice},
abstractNote = {Metal additive manufacturing (AM) allows for the freeform creation of complex parts. However, AM microstructures are highly sensitive to the process parameters used. Resulting microstructures vary significantly from typical metal alloys in grain morphology distributions, defect populations and crystallographic texture. AM microstructures are often anisotropic and possess three-dimensional features. These microstructural features determine the mechanical properties of AM parts. Here, we reproduce three “canonical” AM microstructures from the literature and investigate their mechanical responses. Stochastic volume elements are generated with a kinetic Monte Carlo process simulation. A crystal plasticity-finite element model is then used to simulate plastic deformation of the AM microstructures and a reference equiaxed microstructure. Results demonstrate that AM microstructures possess significant variability in strength and plastic anisotropy compared with conventional equiaxed microstructures.},
doi = {10.1007/s11837-019-03808-x},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 1,
volume = 72,
place = {United States},
year = {2019},
month = {10}
}
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