The effects of postweld heat treatment and isothermal aging on T92 steel heat-affected zone mechanical properties of T92/TP316H dissimilar weldments
| Autor: | Ján Kepič, Ivo Dlouhý, Lucia Čiripová, Peter Ševc, Ladislav Falat |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Toughness Heat-affected zone Materials science Impact toughness Mechanical Engineering Metallurgy 02 engineering and technology Welding 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Isothermal process law.invention Mechanics of Materials law 0103 physical sciences General Materials Science Tempering Composite material 0210 nano-technology |
| Zdroj: | Journal of Materials Research. 31:1532-1543 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/jmr.2016.134 |
| Popis: | Cross-weld hardness profile, notch-tensile strength, and impact toughness of T92 steel heat-affected zone (T92 HAZ) of dissimilar T92/TP316H welds were studied in dependence of their postweld heat treatment (PWHT) and subsequent long-term aging. Two weldments series were individually subjected to either “single-step” tempering PWHT or a modified “two-step” renormalizing and tempering PWHT. Subsequently, the welds were isothermally aged at 625 °C for durations from 500 up to 11,000 h. The “single-step” PWHT preserved sharp hardness gradient of T92 HAZ, whereas the “two-step” PWHT led to the hardness values equalization. The T92 HAZ of the weldment after the “two-step” PWHT exhibited initially lower strength and higher toughness, compared to the weldment after the “single-step” PWHT. However, after long-term aging a more suitable combination of T92 HAZ mechanical properties i.e., the higher toughness and acceptable strength exhibited the weldments processed by “single-step” PWHT. |
| Databáze: | OpenAIRE |
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