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.
Rodgers, Theron M., et al. "Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties." JOM. Journal of the Minerals, Metals & Materials Society, vol. 72, no. 1, Oct. 2019. https://doi.org/10.1007/s11837-019-03808-x
Rodgers, Theron M., Lim, Hojun, & Brown, Judith Alice (2019). Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties. JOM. Journal of the Minerals, Metals & Materials Society, 72(1). https://doi.org/10.1007/s11837-019-03808-x
Rodgers, Theron M., Lim, Hojun, and Brown, Judith Alice, "Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties," JOM. Journal of the Minerals, Metals & Materials Society 72, no. 1 (2019), https://doi.org/10.1007/s11837-019-03808-x
@article{osti_1574438,
author = {Rodgers, Theron M. and Lim, Hojun and Brown, Judith Alice},
title = {Three-Dimensional Additively Manufactured Microstructures and Their Mechanical Properties},
annote = {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},
url = {https://www.osti.gov/biblio/1574438},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
issn = {ISSN 1047-4838},
number = {1},
volume = {72},
place = {United States},
publisher = {Springer},
year = {2019},
month = {10}}