|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Electrochemical-mechanical Interactions in an Aluminum Alloy under Slow Strain Rate Stress Corrosion Cracking
||Xinzhu Zheng, Homero Castaneda, Ankit Srivastava
|On-Site Speaker (Planned)
Stress corrosion cracking (SCC) leads to nucleation and catastrophic propagation of cracks due to the synergy between susceptible materials, tensile stresses, and corrosive environment. SCC is the most insidious form of corrosion because its mechanisms are unclear and its occurrence unpredictable. In general, SCC susceptibility is analyzed by simply characterizing mechanical failure of a material in a corrosive environment, while the emerging electrochemical characteristics are ignored. The aim of this study is to investigate the collaborative effect of mechanical loading and corrosive environment on tensile response of an Aluminum Alloy, AA7075, especially in an extremely aggressive environment. A 3-electrode setup for Electrochemical Impedance Spectroscopy (EIS) is built to characterize electrochemical behavior while varying slow strain rates and corrosive environment are applied. These results provide an unprecedented view of all interfacial phenomena affecting SCC and when coupled with microscopic characterization reveal the effect of harsh environment on the corresponding failure mode.
||Planned: Supplemental Proceedings volume