||Wei Tang, Obed Daniel Acevedo, Yukinori Yamamoto, Andrzej Nycz, Peeyush Nandwana, Michael Kirka, Derek Vaughan, Chris Masuo, Luke Meyer, Sudarsanam S. Babu, Sougata Roy
Latest wire arc additive manufacturing (WAAM) technology can achieve a production of complex geometry components made of multi-materials while maintaining the WAAM technological advantage such as high efficiency, low cost, and short time consumption. However, metallurgical, microstructural, and mechanical characterization of multi-materials produced by WAAM are currently not fully studied. In this study, WAAM was adopted to produce dissimilar materials 410 martensitic stainless steel (SS) and mild steel deposited by AWS ER410 and ER70S-6 welding wires, respectively, for automotive hot stamping application. Post-print heat treatment was introduced to investigate the heat treatment effects on the WAAM printed component. Detailed microstructure characterization including defect analysis of the printed component was conducted by multiple cross sections across the fusion boundary. Mechanical properties were evaluated on the printed 410 martensitic SS and the mild steel, as well as the material across the interface, under as-printed and post-print heat treated conditions. The printed part quality, the microstructure, and the mechanical properties are to be correlated, and the effect of post-print heat treatment on the material performance will be discussed.
Research was sponsored by the U.S. DOE, Office of EERE, Additive Manufacturing Office, under contract DE-AC05-00OR22725 with UT-Battelle, LLC, and supported by a collaboration with Lincoln Electric.
This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (<http://energy.gov/downloads/doe-public-access-plan>).