The structural dynamic behavior of 3D-printed and conventional aluminum alloys are studied experimentally. Heat treated Scalmalloy and Al 7075 T-6 beam-like structures are fabricated using additive and extrusion manufacturing, respectively. The beams are exposed to vibration fatigue. Linear and nonlinear dynamic characterizations are performed to extract the stiffness and damping properties for pristine and fatigued structures. Additionally, the study includes optical imaging, Electron Backscatter Diffraction (EBSD), and Atomic Force Microscopy (AFM) to obtain the alloys’ materials properties. While the preliminary results show that Scalmalloy fatigue life is approximately 3-4 times lower than Al 7075 T-6, failure in Scalmalloy appears to be more graceful and predictable than that for aluminum.
|Title of host publication||ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems|
|Place of Publication||Louisville, KY, USA|
|Publisher||American Society of Mechanical Engineers (ASME)|
|Number of pages||6|
|Publication status||Published - 9 Sep 2019|
|Event||ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2019 - Omni Louisville, Louisville, United States|
Duration: 9 Sep 2019 → 11 Sep 2019
|Conference||ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2019|
|Period||9/09/19 → 11/09/19|
Habtour, E. M., Cordova, L., Di Maio, D., Cole, D. P., & Tinga, T. (2019). Structural Dynamic Performance of Additive and Conventional Manufactured Aerospace Metallic Alloys. In ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems (pp. 1-6).  Louisville, KY, USA: American Society of Mechanical Engineers (ASME).