|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Fatigue and Fracture III
||Implications of Post-processing Induced Microstructural Changes on the Deformation and Fracture Behavior of Additively Manufactured Ti6Al4V Alloy
||Lara Draelos, Xinzhu Zheng, Ryan R. Dehoff, Peeyush Nandwana, Ankit Srivastava
|On-Site Speaker (Planned)
Electron beam powder bed fusion of Ti6Al4V alloy results in columnar beta grains with acicular alpha. Such a microstructure often leads to anisotropic mechanical behavior. The microstructure of the additively manufactured Ti6Al4V alloy can be modified by post-processing heat treatment. The objective of this work is to quantify the effect of post-processing induced microstructural changes on the deformation and fracture behavior of additively manufactured Ti6Al4V alloy. To this end, we have carried out sub-transus and super-transus heat treatments of the as-processed material. The smooth and notched sheet specimens of the as-processed and all the post-processed materials are deformed under uniaxial tension inside a scanning electron microscope (SEM). The in-situ SEM tests coupled with digital image correlation allows us to capture both the macroscopic response and the distribution of microscopic deformation and strains. In this presentation we attempt to correlate the microscale deformation and strain measurements with the observed macroscopic response.
||Planned: Supplemental Proceedings volume