|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Fatigue and Fracture III
||Investigating Local Microstructure Response During Crack Initiation and Propagation in DMLS IN718 Subjected to High Cycle Fatigue Loading
||Priya Ravi, Diwakar Naragani, Michael D. Sangid, Jun-Sang Park, Peter Kenesei
|On-Site Speaker (Planned)
Additive manufacturing has gained immense popularity over the past decade due to its numerous capabilities. However, the performance of AM manufactured parts in fatigue and fracture critical applications is still uncertain. This study aims to enhance understanding on the topic by using non-destructive inspection techniques that use high energy x-rays from a synchrotron source to characterize microstructural variations during high cycle fatigue loading of IN718 produced by direct metal laser sintering. A 3-dimensional microstructural region has been characterized with grain level details and void content. The evolution of grain level lattice strains in the vicinity of nucleating and propagating cracks in response to in-situ loading is shown. Specific focus has been placed on relating crack propagation and the evolving anisotropic elastic response of the microstructure surrounding it.
||Planned: Supplemental Proceedings volume