|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Fatigue and Fracture III
||Tensile, Compressive, Cyclic, and Fracture Behavior of Direct Metal Laser Sintered Ti64
||Saeede Ghorbanpour, Brandon McWilliams, Marko Knezevic
|On-Site Speaker (Planned)
A detailed study of the strength and cyclic behavior of additively manufactured (AM) Ti64 superalloy was conducted. To determine the effect of heat treatment tests were performed for both as-built and heat treated materials. It has been observed that the heat treatment increases the ductility in both tension and compression where the elongation increased more than hundred per cent in the expense of a reduction in strength. The heat treatment also improved the high cycle fatigue (HCF) behavior in higher stress amplitudes. However, the as-built material reached the endurance limit at higher stress amplitudes. Electron Backscattered Diffraction (EBSD) revealed lamellar alpha in as-built material while globular alpha was observed in the heat-treated superalloy. Strain-controlled low cycle fatigue (LCF) and pre-strained large-cycle tests were performed to study the softening/hardening behaviour of the as-built material. Finally, the Coffin-Manson model was used to interpret the LCF data and to extrapolate the strain-life curves.
||Planned: Supplemental Proceedings volume