About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Regional Mechanical Performance and the Effects of Surface Defects in AM Al-10Si-Mg |
Author(s) |
Thomas A. Ivanoff, Nathan Heckman, Andrew Polonsky, Kyle Johnson |
On-Site Speaker (Planned) |
Thomas A. Ivanoff |
Abstract Scope |
Additively manufactured (AM) components can provide mass savings and production agility when used in structural applications for a multitude of fields. The variable mechanical behavior of AM metals can lead to uncertainties in performance that are challenging to account for during design. Uncertainty in performance can arise from build parameters, stochastic variability across builds, and differences in microstructure. Mechanical performance can also vary spatially within individual components. This study focuses on the mechanical behavior along the exterior regions, approximately 150 micrometers deep, of an Al-10Si-Mg AM alloy and how failure propagates from this exterior region. High-fidelity microstructural characterizations were combined with in-situ computed tomography during uniaxial-tensile testing to evaluate properties along exterior surfaces. The observed mechanics were incorporated directly into reduced order meshing techniques that can account for specific properties along the exterior of AM materials into models. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |