|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation Mechanisms
||Effect of 3D Crystallographic Orientation on Evolution of Corrosion in Aluminum Alloys
||Hrishikesh Bale, Tyler J. Stannard, Jeff Gelb, Erik Lauridsen, Leah L Lavery, Arno Merkle, Nikhilesh Chawla
|On-Site Speaker (Planned)
To investigate the effects of corrosion and fatigue on peak-aged 7475 aluminum alloy, we imaged the corroded samples using laboratory based non-destructive 3D X-ray microscopy. In combination with the conventional absorption contrast tomography we collected an additional dataset using Diffraction Contrast Tomography which enabled reconstruction of the three dimensional crystallographic information of the grains. The samples were mechanically polished, then soaked in covered 3.5 wt.% NaCl and simultaneously subjected to a constant load to initiate stress corrosion cracking. The combined diffraction contrast tomography and absorption tomography provides comprehensive information of the grains within the samples before and after corrosion, enabling a detailed analysis of damage initiation and propagation. The effect of the microstructure on corrosion cracking and whether the crack follows a path adjacent to preferred orientation of grains will be discussed.
||Planned: Supplemental Proceedings volume