An approach to the understanding of brittle behavior of steel at elevated temperature

Woodford, D. A.; Goldhoff, R.M.

doi:10.1016/0025-5416(70)90023-6

Cited by 30 publications

(2 citation statements)

References 28 publications

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“…Many theories have been advanced to explain the general deterioration of creep strength in terms of specific mechanisms and these are well documented [1,2,3]. Many theories have been advanced to explain the general deterioration of creep strength in terms of specific mechanisms and these are well documented [1,2,3].…”

Section: Introductionmentioning

confidence: 99%

Crack propagation under creep conditions in a quenched % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXafv3ySLgzGmvETj2BSbqefm0B1jxALjhiov2D% aebbfv3ySLgzGueE0jxyaibaiGc9yrFr0xXdbba91rFfpec8Eeeu0x% Xdbba9frFj0-OqFfea0dXdd9vqaq-JfrVkFHe9pgea0dXdar-Jb9hs% 0dXdbPYxe9vr0-vr0-vqpWqaaeaabiGaciaacaqabeaadaqaaqGaaO% qaaiaaikdadaWcbaWcbaGaaGymaaqaaiaaisdaaaaaaa!3E80!\[2\tfrac{1}{4}\]chromium 1 molybdenum steel

1973

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S U M M A R Y Crack growth rates have been measured in single edge-notched specimens of 2¼ Cr 1 Mo steel loaded in tension at 565 °C. It is shown that the creep crack growth rate in tests of up to about 2,000 hours duration can be described in terms of the sharp crack stress intensity factor. A correlation is obtained over five orders of magnitude in crack growth rate and the relationship of these results to conventional creep tests is discussed. For the particular test conditions the time required to initiate a crack from a notch is not significant compared with the total times for specimens to fail. Under some conditions high rates of stable crack growth rate can be obtained. The work has obvious potential in the assessment of the integrity of components which contain defects and operate under creep conditions. A possible application of the data to the analysis of a particular thermal fatigue situation is suggested.

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Section: Introductionmentioning

confidence: 99%

Crack propagation under creep conditions in a quenched % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXafv3ySLgzGmvETj2BSbqefm0B1jxALjhiov2D% aebbfv3ySLgzGueE0jxyaibaiGc9yrFr0xXdbba91rFfpec8Eeeu0x% Xdbba9frFj0-OqFfea0dXdd9vqaq-JfrVkFHe9pgea0dXdar-Jb9hs% 0dXdbPYxe9vr0-vr0-vqpWqaaeaabiGaciaacaqabeaadaqaaqGaaO% qaaiaaikdadaWcbaWcbaGaaGymaaqaaiaaisdaaaaaaa!3E80!\[2\tfrac{1}{4}\]chromium 1 molybdenum steel

1973

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“…The mechanism of creep cavitation in unaged and aged 10, causing the creep embrittlement, has not been dealt with here, as it was thoroughly discussed elsewhere in the open literature. [50,51] However, the nucleation of creep cavities at grain boundaries mainly occurs at the interfaces of inert carbide/inclusion and matrix, whereas their growth is controlled by matrix creep, grain boundary sliding, and diffusion of grain boundary vacancies.…”

Section: Discussionmentioning

confidence: 99%