|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques II
||Solidification Crack Propagation and Morphology Dependence on Processing Parameters in AA6061 from Ultra-high-speed X-ray Visualization
||Nadia Kouraytem, Po-Ju Chiang, Runbo Jiang, Christopher Kantzos, Joseph Pauza, Ross Cunningham, Ziheng Wu, Guannan Tang, Niranjan Parab, Cang Zhao, Kamel Fezzaa, Tao Sun, Anthony D. Rollett
|On-Site Speaker (Planned)
Solidification or hot cracks are commonly observed defects in a number of metal alloys and may lead to deterioration of additively manufactured parts quality. In this study, ultra-high-speed x-ray radiography experiments enable the observation and characterization of bundles of hot-cracks that form in monobloc AA6061 substrate. The crack bundles are related to meltpool characteristics and pore formation. Crack propagation rate is also presented for the case of a crack that initiates from a pore. Two types of relevant pore formation are also described, namely keyhole porosity and crack-remelting porosity. The results of this study are expected to facilitate the validation of theoretical and numerical models of solidification cracking.
||Additive Manufacturing, Aluminum, Solidification