About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
Presentation Title |
Understanding the Effects of Residual Stress in Mechanical Behavior of SS-316L Manufactured by Laser-wire DED Process |
Author(s) |
Sandeep Dhakal, Allyssa Bateman, Boyd Panton, Jeffrey Bunn, Brian Jaques |
On-Site Speaker (Planned) |
Sandeep Dhakal |
Abstract Scope |
Recent advancements in the AM technologies have shifted the focus from rapid prototyping towards high-value industrial usage. Laser-wire direct energy deposition (LW-DED) can increase the scalability of current AM processes to manufacture large scale industrial components. Since DED technology is characterized by high-energy sources which generate high temperature fields with high temperature gradients, it results in non-uniform residual stresses, causing distortion and plastic deformation of the manufactured components. Since wire-based DED process is less understood as compared to its powder counterparts, understanding the distribution of residual stress with varying process conditions and its effect on mechanical properties would provide us with insight on its structural performance for industrial usage. To do so, spatially resolved residual stress was measured across varying build geometries and interlayer temperatures, using neutron diffraction and X-ray diffraction. These values were then correlated to the microstructure and mechanical behavior of the printed components. |