Characterization of Fatigue and Fracture Behaviour and Improvement of Toughness of End Fitting Material of Pressurized Heavy Water Reactors
| Autor: | Y. V. Kamat, C. Gupta, A. R. Biswas, J. K. Chakravartty, J. S. Dubey, S. Ganguly |
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| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: |
Toughness
Technology Materials science Chemical technology Chemicals: Manufacture use etc TP200-248 TP1-1185 Paris' law Condensed Matter Physics Microstructure Carbide Brittleness Fracture toughness Mechanics of Materials Fracture (geology) General Materials Science Tempering Physical and Theoretical Chemistry Composite material |
| Zdroj: | High Temperature Materials and Processes, Vol 16, Iss 1, Pp 65-76 (1997) |
| ISSN: | 2191-0324 0334-6455 |
| Popis: | An attempt has been made to characterise fracture and high cycle fatigue behaviour and to study the effect of microstructure on fatigue crack growth (FCG) and fracture toughness of AISI 403 material at room temperature. Fracture toughness evaluation of as received end fitting material in J-integral format showed large scatter which was thickness dependent. A considerable improvement in toughness, compared to as received material, resulted by imparting a double quench and tempering treatment (DQT). The toughness of DQT material was thickness independent and showed no scatter. The scatter in room temperature toughness value of as received material results from the fact that ductile to brittle transition temperature is in the vicinity of room temperature. The toughness improvement by DQT treatment appears to result from refinement of microstructure as well as from a change in carbide morphology compared to that of as received material. While thickness and microstructure had no influence on stage II fatigue crack growth (FCG) behaviour, the stage I FCG has been found sensitive to microstructure change. |
| Databáze: | OpenAIRE |
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