|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||Fatigue Crack Growth in Structural Cast Aluminum Alloys: Microstructural Mechanisms, Modeling Strategies, and Integrated Design
||Anthony Spangenberger, Diana Lados
|On-Site Speaker (Planned)
Fatigue crack growth (FCG) studies were performed on solution-strengthened (A535) and precipitation-strengthened (A356, 319) cast aluminum alloys. Microstructures were altered through processing, chemistry, and heat treatment in order to systematically investigate the individual and combined effects of materials’ characteristic microstructural features on FCG. Long FCG tests were performed on compact tension specimens at room temperature and three stress ratios (R=0.1, 0.5, 0.7). Additional small FCG tests were conducted on corner flaw tension specimens at R=0.1. FCG mechanisms at the microstructural scale of the studied alloys were identified, and load-microstructure-damage mechanisms design maps were created. A methodology for data treatment and long-to-physically small crack growth corrections has been developed, and an original model that further incorporates the microstructurally small crack growth behavior was created. A comprehensive ICME toolset for simulating and predicting microstructure-dependent FCG and evaluating component lifetime was also developed and will be discussed.
||Planned: Light Metals Volume