About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Developments in Plate and Line Pipe Steels
|
| Presentation Title |
Creep Performance of P92 Steel Around Its Composition Range: Effect of N Solubility and Normalization Temperature |
| Author(s) |
Stoichko Antonov, Chang-Yu Hung, Yuan Tian, Martin Detrois, Paul D. Jablonski |
| On-Site Speaker (Planned) |
Stoichko Antonov |
| Abstract Scope |
Trace elements can have major consequences on the properties of creep resistant martensitic steels. To better understand the changes in microstructure and mechanical performance associated with the variation of trace elements and enable design of steels operating at more demanding conditions, we formulated three versions of P92 within the specified N, B, and C ranges. The steels were normalized at different temperatures to understand the effect on the microstructure and creep life. Approximately 3 years of cumulated creep testing was performed under four conditions with repeated tests for statistical relevance. From the average calculations, the creep lives of alloys STD and LBN were ~4 to 6 times greater than alloy HBN depending on the creep condition, when given a standard heat treatment, but the difference was diminished with improved normalization treatment. Multiscale characterization revealed key changes due to the trace element variation and normalization, which will be related to performance. |