Environmentally controlled microstructures and correlation with creep rupture
| Autor: | R. Petkovic-Luton, T. A. Ramanarayanan |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
Stress rupture
Materials science Mechanical Engineering Metallurgy Alloy General Engineering Active components engineering.material Condensed Matter Physics Thermal diffusivity Microstructure Metal Creep Mechanics of Materials visual_art visual_art.visual_art_medium engineering General Materials Science Ductility (Earth science) |
| Zdroj: | Metal Science. 16:309-316 |
| ISSN: | 0306-3453 |
| DOI: | 10.1179/030634582790427352 |
| Popis: | The interaction of environment with the mechanical properties can generally be traced to the modification of microstructure induced by changes in alloy chemistry. Evidently, such changes will depend critically on the activity of the gaseous species at the metal surface as well as the diffusivity of the active components. The authors examine the extent to which microstructural changes induced by carburization are critical in terms of the mechanisms of creep and stress rupture. Two temperatures for carburization pretreatment were selected, 950 and 1150°C, which resulted in two distinctly different microstructural forms, even at the same levels of carburization. Creep experiments carried out at 1000 and 1050°C at stresses of 17,21, and 28 MN m−2 clearly show that prior carburization modifies the creep and stress rupture properties of the alloy. Carburization at 950°C increases the creep strength and enhances the time to rupture but significantly reduces the rupture ductility, while carburization at 1... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|