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Meeting MS&T22: Materials Science & Technology
Symposium Steels for Sustainable Development
Presentation Title Exploring the Impact of N Solubility and Trace Elements on the Creep Properties of P92 Steel
Author(s) Stoichko Antonov, 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 allowable N, B, C and Si ranges. Different service conditions were explored, and >80% decrease in creep life was observed at 625C 155MPa for the highest B and N containing alloy. Multiscale characterization (OM, SEM, TEM) revealed key changes due to the trace element variation. The high trace content alloy formed deleterious BN precipitates with morphology that would promote crack nucleation, but also formed higher fractions of beneficial MX precipitates. The alloy with the lowest trace content showed the best creep performance – a result of the refined precipitate populations and the absence of large-scale inclusions and BN precipitates.
Proceedings Inclusion? Undecided


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Exploring the Impact of N Solubility and Trace Elements on the Creep Properties of P92 Steel
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Microstructural Engineering of High Mn Duplex Steel to Achieve Low-cost, High-performance Solutions for Hydrogen Storage and Delivery
Probing Hydrogen-assisted Phase Transformations in Austenitic Stainless Steels Using Synchrotron X-ray Diffraction
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The Essence of Mo and Ni Alloying in Steels for Renewable Power Generation
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