Process-Microstructure-Properties Relationships in DED Ti-6Al-4V

Process-Microstructure-Properties Relationships in DED Ti-6Al-4V. Collaboration with NSWC Carderock. Support from ONR.

CMU will investigate the effect of process conditions and heat treatment on laser hot wire (LHW) directed energy deposition (DED) additive manufacturing (DED-AM) of Ti-6Al-4V. This will continue the collaboration with NSWCCD that developed during the Quality Made (QM) project led by Lockheed-Martin. The tasks listed in the body of the proposal include enhanced tools for process optimization and monitoring, along with process-microstructure-properties relationships. We will focus on advancing the prediction of microstructure and properties as well as measuring and mitigating residual stress.   The effort will make full use of the equipment provided through recent ONR-mediated grants including the LHW-AM system from Lincoln, automated hardness tester, x-ray diffraction contrast tomography system, and Gleeble mechanical test system.