About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Special Session
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Presentation Title |
Ultrasonic Characterization of Frequency Dependence from Interlayer Milling and Peening 316 Stainless Steel during Additive Manufacturing |
Author(s) |
Jazmin Ley, Cody Pratt, Tony Wilson, Luz Sotelo, Michael P. Sealy, Joseph Turner |
On-Site Speaker (Planned) |
Jazmin Ley |
Abstract Scope |
Hybrid additive manufacturing enables functionally graded materials by using secondary processes and energy sources to alter specified locations throughout a build. These secondary processes and energy sources create microstructural changes, such as reducing local grain size average, increasing dislocation density, as well as imparting/relieving residual stresses. These changes in properties are not confined to the layer applied but can have possible compounding effects on previous layers. The ability to control the material properties within a localized region of a part provides significant advantages in part design and performance but presents unique challenges in the nondestructive evaluation (NDE) of such parts. In this work, 316 low carbon stainless steel samples were created using laser powder bed fusion (LPBF) with varying hybrid surface treatments and architectures. Ultrasonic responses, i.e., wave speed and backscatter measurements, were used to investigate the frequency dependence on the ability to detect interlayer spacing in hybrid-AM parts. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |