Long-Term Aging Effect on the Crack Growth in the of Main Circulating Pump Casing Material
Fatigue crack growth (FCG) tests on the main circulating pump casing material were conducted at room temperature to investigate the effect of long-term aging at 400°C. It was found that the FCG rate increased with aging time. However, there were similar ∆Kth values for both the virgin material and a...
Збережено в:
| Дата: | 2015 |
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| Автори: | , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут проблем міцності ім. Г.С. Писаренко НАН України
2015
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| Назва видання: | Проблемы прочности |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/173271 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Long-Term Aging Effect on the Crack Growth in the of Main Circulating Pump Casing Material / F. Xue, W. Yu, M. Yu, W. Liu, G. Shu // Проблемы прочности. — 2015. — № 1. — С. 116-123. — Бібліогр.: 12 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | Fatigue crack growth (FCG) tests on the main circulating pump casing material were conducted at room temperature to investigate the effect of long-term aging at 400°C. It was found that the FCG rate increased with aging time. However, there were similar ∆Kth values for both the virgin material and aged material at the same stress ratios R. At room temperature, ∆Kth was observed to decrease with an increase in R. An equation incorporating the Kmax and ∆K effects was proposed to describe FCG rates over the linear portion of the curve (Paris equation) for all stress ratios. Additionally, fatigue fracture patterns near crack initiation sites reveals quasi-cleavage fracture in thermally aged specimens. |
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