About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques
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Presentation Title |
A-38: Residual Strain Gradients in Thin Walled Additively Manufactured Stainless Steel Pressure Vessels |
Author(s) |
Bjorn Clausen, Rishi Ganeriwala, Donald W Brown, Robert M Ferencz, John S Carpenter |
On-Site Speaker (Planned) |
Bjorn Clausen |
Abstract Scope |
Additive manufacturing (AM) facilitates producing structural components with complex shapes and features, but often results in parts with significant residual stresses. This can be exacerbated in closed structures as in the present example of a thin walled 304L stainless steel pressure vessel with built in mounting points manufactured using powder bed fusion metal AM. We employed high spatial resolution neutron diffraction strain measurements to map residual stresses in both thin- and thick-walled parts of the pressure vessel and used the results to validate and guide the development of a fully coupled thermomechanical multiphysics finite element based process model of the powder bed fusion technique. The predictions of the model are generally in good agreement with the measured data, including significant through thickness gradients found in some thin walled sections as well as in thicker sections near the built in mounting points. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |