|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
||Verification of Compliance-based Crack Initiation Detection Method for Additively Manufactured Materials
||Luke Sheridan, Rachel Evans, Joy Gockel
|On-Site Speaker (Planned)
Additive manufactured (AM) materials exhibit shortened lives due to process-induced defects such as porosity and surface roughness. Current life prediction methods rely on flaw size and material growth properties to approximate fatigue life. For axial fatigue tests, specimen compliance monitoring may indicate crack initiation events and material growth behavior without additional standard tests or added instrumentation; however, independent verification of the method is required to confirm the results. This work proposes identifying the equivalent initial flaw size (EIFS) metric for each specimen and approximating the crack initiation life as the number of cycles required to grow the crack from the EIFS to the actual failure flaw size. Calculated initiation life values will be compared to compliance-based initiation lives. These results will determine the effectiveness of using compliance-based initiation detection and will pave the way for more efficient data collection and AM material characterization.
||Additive Manufacturing, Copper / Nickel / Cobalt, Mechanical Properties