|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Temperature Corrosion of Structural Materials
||Effect of Near Service Environmental Conditions on the High Temperature Damage Behavior of an Intermetallic TiAl Alloy
||Christian Löffl, Holger Saage, Mathias Göken
|On-Site Speaker (Planned)
Intermetallic TiAl alloys have been specially developed as high temperature structural materials for internal combustion engines. The main components of the exhaust gas are nitrogen, carbon dioxide, water vapor, and oxygen. However, most of the high-temperature experiments are carried out under laboratory air.
Within the scope of the presentation, results from stationary corrosion experiments and cyclic thermomechanical experiments with near service environmental conditions are presented and compared to those in synthetic air. Stationary corrosion experiments were performed using thermal gravimetric analysis to investigate the weight increase per time, the oxide build-up, and the influence of the microstructure. The results were compared with those of cyclic thermomechanical experiments performed by means of a servohydraulic test bench with inductive heating and a test chamber that allows variable atmospheres. The insights gained from this investigation can be used in the improvement of alloy composition, for coating development, and a more precise component design.
||Planned: Supplemental Proceedings volume