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...
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| 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 |
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| 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. |
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irk-123456789-1732712020-11-29T01:26:49Z Long-Term Aging Effect on the Crack Growth in the of Main Circulating Pump Casing Material Xue, F. Yu, W. Yu, M. Liu, W. Shu, G. Научно-технический раздел 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. Испытания на сопротивление росту усталостных трещин в материале корпуса главного циркуляционного насоса при комнатной температуре были проведены с целью изучения влияния долговременного старения при 400°С. Установлено, что скорость роста трещин возрастает по мере увеличения времени старения. Однако при одинаковых коэффициентах асимметрии R получены близкие значения ∆Kth для исходного и состаренного материала. Установлено, что при комнатной температуре ∆Kth снижается с увеличением R. Для описания скорости роста усталостных трещин на линейном участке кривой (уравнение Париса) для всех значений коэффициента асимметрии предложено уравнение, учитывающее влияние величин Kmax и ∆K. Характер усталостного разрушения вблизи области зарождения трещин соответствует квазихрупкому излому образцов, подвергшихся термическому старению. 2015 Article 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. 0556-171X http://dspace.nbuv.gov.ua/handle/123456789/173271 539.4 en Проблемы прочности Інститут проблем міцності ім. Г.С. Писаренко НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Научно-технический раздел Научно-технический раздел |
| spellingShingle |
Научно-технический раздел Научно-технический раздел Xue, F. Yu, W. Yu, M. Liu, W. Shu, G. Long-Term Aging Effect on the Crack Growth in the of Main Circulating Pump Casing Material Проблемы прочности |
| description |
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. |
| format |
Article |
| author |
Xue, F. Yu, W. Yu, M. Liu, W. Shu, G. |
| author_facet |
Xue, F. Yu, W. Yu, M. Liu, W. Shu, G. |
| author_sort |
Xue, F. |
| title |
Long-Term Aging Effect on the Crack Growth in the of Main Circulating Pump Casing Material |
| title_short |
Long-Term Aging Effect on the Crack Growth in the of Main Circulating Pump Casing Material |
| title_full |
Long-Term Aging Effect on the Crack Growth in the of Main Circulating Pump Casing Material |
| title_fullStr |
Long-Term Aging Effect on the Crack Growth in the of Main Circulating Pump Casing Material |
| title_full_unstemmed |
Long-Term Aging Effect on the Crack Growth in the of Main Circulating Pump Casing Material |
| title_sort |
long-term aging effect on the crack growth in the of main circulating pump casing material |
| publisher |
Інститут проблем міцності ім. Г.С. Писаренко НАН України |
| publishDate |
2015 |
| topic_facet |
Научно-технический раздел |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/173271 |
| citation_txt |
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. |
| series |
Проблемы прочности |
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2023-10-18T22:33:43Z |
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