| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Temperature Creep Properties of Advanced Structural Materials
|
| Presentation Title |
Thermal Creep Models Derived from a Comprehensive Multiple Heat 9Cr Tempered Martensitic Steels Database |
| Author(s) |
Md Ershadul Alam, Takuya Yamamoto, G.R. Odette |
| On-Site Speaker (Planned) |
Md Ershadul Alam |
| Abstract Scope |
The dimensional stability of fusion structures must account for primary creep strains. Three new primary creep models have been developed for 9Cr TMS. The applied creep stress (σ) was the independent variable to be optimized for 0.2 to 2% strains at 375 to 550ºC. The models were calibrated to a TMS database for 17 heats, predict s from 160 to 420 MPa at times from ≈ 0.2 to 80,000h. The models include: 1) the Larson-Miller; 2) applied stress (σ) normalized to the temperature dependent σy [σ/σy(T)] or σu, [σ/σu(T)]; and 3) a threshold stress scaling with either σy(T) or σu(T), as [σ-Cσy/u(T)]. The [σ/σu(T)] model yields the best σ predictions with a SD ≈ 11 MPa, mean error ≈ 0 MPa and ≈1:1 measured vs predicted lines with at ≈ 0 MPa intercept. All other creep properties were modeled and the effects of irradiation softening were also assessed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Nuclear Materials, Other |