|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Sensitization Effects on Environmentally Assisted Cracking of Al-Mg Alloys
||Mohsen Seifi, Henry Holroyd, Timothy Burnett, John J Lewandowski
|On-Site Speaker (Planned)
Environment induced cracking (EIC) in smooth tensile and fatigue pre-cracked test specimens of AA5083-H131 have been evaluated as a function of sensitization time up to 7,000 h, temperature (80°C to 175°C), and test environment. Slow strain rate testing of short-transverse smooth tensile samples, and pre-cracked S-T single edge notch specimens were conducted using a range of load point displacement rates. IGSCC was only promoted when straining was applied sufficiently slowly in a test environment capable of providing a local source of hydrogen. Exposure to an aqueous solution during sensitization at 80°C, as opposed to dry air developed within an air-oven can influence EIC initiation. Detailed IGSCC evaluation using X-ray computed 3-D tomography and ultra-high-resolution electron microscopy has enabled mechanistic insights.
||Planned: Supplemental Proceedings volume