Cryogenic fracture toughness and temperature rise of thick section weldments in forged JJ1 type austenitic stainless steel plate
| Autor: | Yasuhide Shindo, T. Takahashi, Tomoyuki Kobori, Kazuaki Sanada, Katsumi Horiguchi |
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| Rok vydání: | 1998 |
| Předmět: |
Materials science
Gas tungsten arc welding Mechanical Engineering Metallurgy Metals and Alloys Fractography Fracture mechanics Superconducting magnet Welding engineering.material Surfaces Coatings and Films law.invention Fracture toughness law Thermocouple Mechanics of Materials engineering Austenitic stainless steel |
| Zdroj: | Welding International. 12:360-365 |
| ISSN: | 1754-2138 0950-7116 |
| DOI: | 10.1080/09507119809448500 |
| Popis: | Summary JJ1 type austenitic stainless steel is emerging as the preferred structural material for nuclear fusion reactor superconducting magnet casings designed to operate at the temperature of liquid helium (4 K). To evaluate the cryogenic fracture toughness and temperature rise of tungsten inert gas (TIG) welds in 200 mm thick forged JJ1 type austenitic stainless steel plate for the next generation of nuclear fusion reactor superconducting magnets, clastic-plastic fracture toughness (J1C) tests were conducted with 1T compact tension specimens at 4 K. The tests were conducted to ASTM E813–87 standard specifications for determination of J1C by the unloading compliance technique to monitor crack growth. Au/0.07%Fe-chromel thermocouples were used to measure the temperature rise near the crack tip. The effects of the specimen sampling position and nitrogen content on J1C are examined. Specimens were examined by scanning electron microscopy (SEM) after fracture testing. The effect of the inclusion content on t... |
| Databáze: | OpenAIRE |
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