Abstract
Additively manufactured (AM) metal-metal composites consisting of PrintCasted 316 L austenitic stainless-steel lattice structures infiltrated with A356 casting alloy, have recently been developed for use in high energy absorption systems with potential applications ranging from static load bearing to dynamic blast containment structures. This system has a unique mechanical behavior as the volume fraction of lattice increases showing a transition from localized to de-localized failure and dramatic increase in energy absorption capability. In this work, PrintCast A356/316 L composite tensile specimens were produced with lattice volume fractions ranging from 20 % to 50 % to capture the range of this behavior. Finite element simulations support neutron diffraction measurements of stress state. Results illustrate that in tension, the reinforcement material is in tension while the matrix support material is in compression, information offering significant insight into the transition to de-localized failure. Moreover, the simulation results provide further insight into how interfacial bonding (or lack of bonding) affects the energy absorption capabilities of the PrintCast composites.
| Original language | English |
|---|---|
| Article number | 104769 |
| Journal | Additive Manufacturing |
| Volume | 103 |
| DOIs | |
| State | Published - Apr 5 2025 |
Funding
This research was sponsored by the US Department of Energy, Office of Vehicle Technology, Jerry Gibbs program manager, under a prime contract with Oak Ridge National Laboratory (ORNL). ORNL is managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract DE-AC05 00OR22725. This work was funded by the DOE Energy Efficiency & Renewable Energy Vehicle Technologies O\uFB03ce under the Powertrain Materials Core Program. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by ORNL. The authors graciously acknowledge Professor Zachary Cordero for insights, discussion and supervision of the work. This research was sponsored by the US Department of Energy, Office of Vehicle Technology, Jerry Gibbs program manager, under a prime contract with Oak Ridge National Laboratory (ORNL). ORNL is managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract DE-AC05 00OR22725. This work was funded by the DOE Energy Efficiency & Renewable Energy Vehicle Technologies O\uFB03ce under the Powertrain Materials Core Program. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by ORNL.
Keywords
- Additive Manufacturing
- Neutron Diffraction
- PrintCast
- Stress State
- Tensile Loading