Abstract
Interstitial atoms such as carbon and nitrogen play an important role in the
mechanical properties of austenitic stainless steels and Inconel alloys. Strength
and creep resistance of these alloys in the environmental conditions of nuclear
reactors depend on the amount, state and diffusion mobility of interstitial atoms
dissolved in the alloy. Because of the interaction of carbon and nitrogen with
mobile dislocations, even a minor content in the solid solution results in dynamic
strain aging (DSA) of the alloys at temperatures above 200 oC [1 - 3]. DSA is manifested by negative strain rate sensitivity, and serrated yielding during straining at elevated temperatures and results often in a remarkable degradation of mechanical properties. DSA phenomenon leads to inhomogeneous plastic flow, which results in strain localization that can affect crack initiation and propagation.
mechanical properties of austenitic stainless steels and Inconel alloys. Strength
and creep resistance of these alloys in the environmental conditions of nuclear
reactors depend on the amount, state and diffusion mobility of interstitial atoms
dissolved in the alloy. Because of the interaction of carbon and nitrogen with
mobile dislocations, even a minor content in the solid solution results in dynamic
strain aging (DSA) of the alloys at temperatures above 200 oC [1 - 3]. DSA is manifested by negative strain rate sensitivity, and serrated yielding during straining at elevated temperatures and results often in a remarkable degradation of mechanical properties. DSA phenomenon leads to inhomogeneous plastic flow, which results in strain localization that can affect crack initiation and propagation.
| Original language | English |
|---|---|
| Title of host publication | 20th International Conference on Structural Mechanics in Reactor Technology, SMiRT 20 |
| Subtitle of host publication | Book of abstracts |
| Editors | Seppo Vuori, Rauno Rintamaa |
| Publisher | VTT Technical Research Centre of Finland |
| Pages | 57-59 |
| Volume | 1 |
| ISBN (Electronic) | 978-951-38-6338-8 |
| ISBN (Print) | 978-951-38-6337-1 |
| Publication status | Published - 2009 |
| MoE publication type | A4 Article in a conference publication |
| Event | 20th International Conference on Structural Mechanics in Reactor Technology, SMiRT 20 - Espoo, Finland Duration: 9 Aug 2009 → 14 Aug 2009 Conference number: 11 |
Publication series
| Series | VTT Symposium |
|---|---|
| Number | 256 |
| ISSN | 0357-9387 |
Conference
| Conference | 20th International Conference on Structural Mechanics in Reactor Technology, SMiRT 20 |
|---|---|
| Abbreviated title | SMiRT 20 |
| Country/Territory | Finland |
| City | Espoo |
| Period | 9/08/09 → 14/08/09 |