|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||Investigating the Role of Porosity in DMLS IN718 by Crystal Plasticity Modeling with Experimental Validation
||Veerappan Prithivirajan, Todd Book, Diwakar P Naragani, Michael D Sangid
|On-Site Speaker (Planned)
Direct metal laser sintering (DMLS) can be used for aerospace applications to realize numerous advantages, which have been well documented. However, prior to their use in safety critical components, the failure mechanisms have to be well understood, especially for the unique defects in DMLS materials, especially porosity. In our work, fatigue crack initiation of a Ni-based superalloy, IN 718, produced by DMLS is studied via crystal plasticity finite element (CPFE) simulations and experimental tools such as (i) concurrent digital image correlation and electron backscatter diffraction (DIC-EBSD) and (ii) high energy x-ray diffraction microscopy (HEDM). Hot spots obtained from the CPFE simulations are used to identify the possible location of the crack initiation. Also, the role of pore size on the crack nucleation is investigated. Finally, the strain fields obtained from the CPFE simulations are compared to experimental data obtained from DIC-EBSD and HEDM.
||Planned: Supplemental Proceedings volume