Deformation and failure of PrintCast A356/316 L composites: Digital image correlation and finite element modeling
Abstract
A356/316 L interpenetrating phase composites can be fabricated by infiltrating additively-manufactured 316 L stainless-steel lattices with a molten A356 aluminum alloy, a new process termed PrintCasting. This work investigates the mechanical properties of PrintCast composites and their relation to the volume-fraction of 316 L reinforcement. Uniaxial tension experiments were conducted with A356/316 L PrintCast composites that had either 30 vol%, 40 vol% or 50 vol% 316 L. When 316 L reinforcement increased from 30 vol% to 40 vol%, a > 200% increase in ductility and 400% increase in absorbed-energy were observed, while a much lower increase was exhibited when reinforcement increased from 40 vol% to 50 vol%. The failure of the 30 vol% sample occurred by localized deformation and a single failure initiation region, in contrast to the 40 vol% and 50 vol% samples which failed by delocalized damage in the entire gauge section. To understand this transition phenomena, digital image correlation (DIC) was coupled with finite element (FE) analysis to capture the deformation and failure processes. The results revealed that, for all samples, stress concentrated and failure initiated in a 316 L strut near the lattice nodes, where the strut underwent localized bending-dominated deformation. In the high 316 Lmore »
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
- OSTI Identifier:
- 1647656
- Alternate Identifier(s):
- OSTI ID: 1651343
- Grant/Contract Number:
- AC05 00OR22725; AC05-00OR22725
- Resource Type:
- Published Article
- Journal Name:
- Materials & Design
- Additional Journal Information:
- Journal Name: Materials & Design Journal Volume: 195 Journal Issue: C; Journal ID: ISSN 0264-1275
- Publisher:
- Elsevier
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Composites; additive manufacturing; digital image correlation; finite element analysis
Citation Formats
Cheng, Jiahao, Gussev, Maxim, Allen, Jason, Hu, Xiaohua, Moustafa, Abdel R., Splitter, Derek A., and Shyam, Amit. Deformation and failure of PrintCast A356/316 L composites: Digital image correlation and finite element modeling. United Kingdom: N. p., 2020.
Web. doi:10.1016/j.matdes.2020.109061.
Cheng, Jiahao, Gussev, Maxim, Allen, Jason, Hu, Xiaohua, Moustafa, Abdel R., Splitter, Derek A., & Shyam, Amit. Deformation and failure of PrintCast A356/316 L composites: Digital image correlation and finite element modeling. United Kingdom. https://doi.org/10.1016/j.matdes.2020.109061
Cheng, Jiahao, Gussev, Maxim, Allen, Jason, Hu, Xiaohua, Moustafa, Abdel R., Splitter, Derek A., and Shyam, Amit. Thu .
"Deformation and failure of PrintCast A356/316 L composites: Digital image correlation and finite element modeling". United Kingdom. https://doi.org/10.1016/j.matdes.2020.109061.
@article{osti_1647656,
title = {Deformation and failure of PrintCast A356/316 L composites: Digital image correlation and finite element modeling},
author = {Cheng, Jiahao and Gussev, Maxim and Allen, Jason and Hu, Xiaohua and Moustafa, Abdel R. and Splitter, Derek A. and Shyam, Amit},
abstractNote = {A356/316 L interpenetrating phase composites can be fabricated by infiltrating additively-manufactured 316 L stainless-steel lattices with a molten A356 aluminum alloy, a new process termed PrintCasting. This work investigates the mechanical properties of PrintCast composites and their relation to the volume-fraction of 316 L reinforcement. Uniaxial tension experiments were conducted with A356/316 L PrintCast composites that had either 30 vol%, 40 vol% or 50 vol% 316 L. When 316 L reinforcement increased from 30 vol% to 40 vol%, a > 200% increase in ductility and 400% increase in absorbed-energy were observed, while a much lower increase was exhibited when reinforcement increased from 40 vol% to 50 vol%. The failure of the 30 vol% sample occurred by localized deformation and a single failure initiation region, in contrast to the 40 vol% and 50 vol% samples which failed by delocalized damage in the entire gauge section. To understand this transition phenomena, digital image correlation (DIC) was coupled with finite element (FE) analysis to capture the deformation and failure processes. The results revealed that, for all samples, stress concentrated and failure initiated in a 316 L strut near the lattice nodes, where the strut underwent localized bending-dominated deformation. In the high 316 L volume-fraction composites, the increase in 316 L-strut diameter reduced local bending stress and stabilized the deformation, leading to improved damage tolerance. Based on the presented analysis, local modifications to the PrintCast structure are suggested.},
doi = {10.1016/j.matdes.2020.109061},
journal = {Materials & Design},
number = C,
volume = 195,
place = {United Kingdom},
year = {2020},
month = {10}
}
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