Influence of hydride orientation on fracture toughness of CWSR Zr-2.5%Nb pressure tube material between RT and 300 °C
| Autor: | Rishi Sharma, R.N. Singh, Asim Tewari, Bhupendra K. Kumawat, Saurav Sunil, Bhagwati Prasad Kashyap |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Cracking
Nuclear and High Energy Physics Materials science Hydrogen Alloy chemistry.chemical_element 02 engineering and technology Reorientation engineering.material Hydrogen Content Stress 01 natural sciences Radial Hydride Thermal expansion 010305 fluids & plasmas Stress (mechanics) Fabrication Embrittlement Fracture toughness Fracture Toughness 0103 physical sciences General Materials Science Universal testing machine Zr-2.5%Nb Alloy Pressure Tube Hydride Embrittlement Hydride Metallurgy Temperature 021001 nanoscience & nanotechnology Stress Reorientation Treatment Nuclear Energy and Engineering chemistry Zirconium Hydride engineering Cylinder stress 0210 nano-technology |
| Zdroj: | Journal of Nuclear Materials. 488:231-244 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2017.03.025 |
| Popis: | An experimental setup was designed, fabricated and used to form radial hydrides in Zr-2.5%Nb alloy pressure tube spool. The design of setup was based on ensuring a hoop stress in the spool greater than threshold stress for reorientation of hydrides in this alloy, which was achieved by manipulating the thermal expansion coefficient of the plunger and pressure tube material and diametral interference between them. The experimental setup was loaded on a universal testing machine (UTM) fitted with an environmental chamber and subjected to a temperature cycle for the stress reorientation treatment. The metallographic examination of the hydrogen charged spools subjected to stress re-orientation treatment using this set up revealed formation of predominantly radial hydrides. The variation of fracture toughness of material containing radial hydride with test temperature showed typical 'S' curve behavior with transition temperatures more than that of the material containing circumferential hydride. (C) 2017 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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