Factors that affect hydrogen susceptibility of fatigue life in SCM435 steel and analysis of their impacts
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- KITTINAN Chitkuar
- Department of mechanical engineering School of engineering, Daido University
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- YMAMOTO kouta
- Department of mechanical engineering School of engineering, Daido University
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- SATO Sho
- Department of mechanical engineering School of engineering, Daido University
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- SHIMIZU Tatsuya
- Department of mechanical engineering School of engineering, Daido University
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- TSUCHIDA Yutaka
- Department of mechanical engineering School of engineering, Daido University
Bibliographic Information
- Other Title
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- SCM435鋼の疲労における水素感受性への影響因子と影響度の解析
Abstract
High strength Cr-Mo steels are useful for high performance machinery and equipment. Factors that affect hydrogen susceptibility of fatigue lives have been explored and analyzed quantitatively by using SCM435 steel of various purities. Logarithm of fatigue life ratio log (RNf) , which means the fatigue life of hydrogen charged specimen normalized by that of non-charged one, is proportional to H (450K) that means the amount of hydrogen evolved up to 450K in thermal desorption spectroscopy (TDS) measurement. The proportional coefficient is negative and changes in accordance with the square of phosphorous content of the specimen. The intercept of log (RNf) is zero for soaking in FIP solution, but it becomes log (0. 2) to log (0. 4) for cathodic hydrogen charging. The log (RNf) is lowered by increase in tensile strength. Supposing that the degradation be independent with hydrogen and phosphorous contents, this term could be proportional to tensile strength. Within the experimental range, the fatigue life ratio RNf can be expressed by the following equation, <br> log RNf(est) =log (rpit) -1500•H(450K) •P2-0. 0045•TS+4. 8<br>Here rpit is the correction factor for corrosion pit, P is phosphorous content, TS is tensile strength in MPa
Journal
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- Journal of High Pressure Institute of Japan
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Journal of High Pressure Institute of Japan 50 (5), 254-262, 2012
HIGH PRESSURE INSTITUTE OF JAPN(HPI)
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Keywords
Details 詳細情報について
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- CRID
- 1390001204615928576
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- NII Article ID
- 130004446898
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- ISSN
- 13479598
- 03870154
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed