|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Temperature Corrosion of Structural Materials
||Cyclic Oxidation Resistance of Chromia Forming Alloys in a Flowing High Temperature Exhaust Gas Environment
||Jordan Graham, Savko Malinov, Roy Douglas, Andrew Woods
|On-Site Speaker (Planned)
The continued integrity of a protective oxide layer is crucial to the performance of high temperature structural alloys, thermal cycling and harsh working environments can adversely affect this protective layer. In this work four chromia forming alloys have been studied and compared (stainless steel grades 304, 316 and 310 also Ni-based alloy Inconel625). The alloys were subjected to a simulated exhaust gas environment with a flow rate of 20 g/s at 900°C. Samples were exposed to 5, 10, 15, 20 and 25 thermal cycles, with each cycle lasting 2h. The sample masses were recorded every 5 cycles allowing the observation of alloy oxidation kinetics in the high temperature environment. The oxide layers formed on the samples were investigated by SEM, EDX and XRD analysis. Information derived from oxide layer characterization was used to explain any differences between the alloys in terms of oxidation rate and overall alloy performance.
||Planned: Supplemental Proceedings volume