Monday  |  Cedar  |  04:10 PM–04:30 PM

#18003, Residual Stress and Distortion Characterization of Additively Manufactured Ti-5553

Additive manufacturing can produce complex and lightweight structures with a high level of flexibility and minimal waste. However, the thermal history of the additively manufactured (AM) components can result in the development of unwanted and, frequently, detrimental residual stresses. Establishing the ability to predict and control residual stresses in AM parts could lead to the design of beneficial residual stresses, which could improve the resultant properties. In this work, we use high-energy X-ray diffraction to determine the residual strain and stress state of AM Ti-5553 components. In particular, three identical “bridge” components were made but each on distinct substructure to study the role that the thermal path and mechanical constraint play in determining the residual stress state. Our aim is to use experimental measurements to provide rigorous data for the validation of thermomechanical models for the AM materials. Acceptable agreement is observed between the experimental results and the model.

Donald Brown   Los Alamos National Laboratory
Maria Strantza   Lawrence Livermore National Laboratory
Alexandre Reikher   Lawrence Livermore National Laboratory
Bjorn Clausen   Los Alamos National Laboratory
Nicholas Bachus   University of California Davis
Michael Hill   University of California Davis