|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Linking Fatigue Life Scatter to Microstructure Variability in DMLS
||Todd Book, Michael Sangid
|On-Site Speaker (Planned)
Although Additive Manufacturing (AM) offers numerous performance advantages over existing methods, AM structures are not being utilized for critical aerospace and mechanical applications due to uncertainties in their structural integrity as a result of the microstructural variations and defects arising from the AM process itself. One of these uncertainties is the observed scatter in the fatigue lives of direct metal laser sintering (DMLS) parts. This research explores the scatter in the fatigue lives of DMLS produced IN718 and Ti-6Al-4V specimens (as-built and post-processed) through the characterization of the linkage between microstructural variations, and the accumulation of plastic strain during low cycle fatigue testing. This study is based on utilizing experimental observations through the employment of advanced material characterization techniques such as digital image correlation to illustrate the impacts of DMLS microstructural variation on fatigue life scatter.
||Planned: A print-only volume