About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Nonlinear Ultrasonic Methods for Nondestructive Evaluation of Additively Manufactured 316L Stainless Steel |
Author(s) |
Madison Sitkiewicz, Anna Hayes , SeHyuk Park, Tribikram Kundu, Krishna Muralidharan |
On-Site Speaker (Planned) |
Madison Sitkiewicz |
Abstract Scope |
Ultrasonic nondestructive evaluation methods are well established for detecting and measuring defects within engineering parts and components. Sideband peak counting (SPC) is a recently developed nonlinear ultrasonic technique used for evaluation of defects down to 10 µm. In this work, 316L stainless steel tensile test specimens were manufactured using laser powder-bed fusion (LPBF) with four levels of energy density. The ensuing porosity and its interplay with other processing defects in the different samples were evaluated using the SPC technique. In parallel, metallographic analysis in conjunction with wave propagation simulations, and mechanical testing were also carried out to complement the SPC characterization. Using machine learning methods, correlations between the SPC index of samples and the underlying porosity, defects, mechanical properties, and LPBF process parameters were obtained, thereby providing the pathway for a fully non-destructive evaluation of additively manufactured 316L stainless steel parts and components. |