Statistical characterization of specimen size and temperature dependence of cleavage fracture toughness of ferritic steels

Based on the numerical results on the non‐linear correlation between volume of plastic zone and global loading level represented by stress intensity factor, the dependence of cleavage fracture toughness of ferritic steels on specimen size and temperature is evaluated based on an empirical statistica...

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Bibliographic Details
Published inFatigue & fracture of engineering materials & structures Vol. 47; no. 6; pp. 2243 - 2250
Main Authors Lei, Wei‐Sheng, Qian, Guian, Zhang, Peilei
Format Journal Article
LanguageEnglish
Published Oxford Wiley Subscription Services, Inc 01.06.2024
Subjects
Cleavage
cleavage fracture toughness
Compact tension
Ferritic stainless steels
ferritic steels
Fracture toughness
Microcracks
Plastic deformation
Plastic zones
specimen size effect
Statistical correlation
statistical model
Statistical models
Stress intensity factors
Temperature dependence
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Summary:Based on the numerical results on the non‐linear correlation between volume of plastic zone and global loading level represented by stress intensity factor, the dependence of cleavage fracture toughness of ferritic steels on specimen size and temperature is evaluated based on an empirical statistical model. The statistical correlation is supported by two sets of toughness data measured from different sized compact tension specimens at different temperatures. To further improve the accuracy of the statistical model, future work is identified to quantify the variation of volume of plastic deformation zone with loading level and measure the average volume for each microcrack at different temperature. Highlights A non‐Weibull statistical model of cleavage toughness is proposed. Dependence of cleavage toughness on temperature and specimen size is studied. The model is validated by two sets of cleavage toughness data. Two research topics are identified for model improvement.
ISSN:8756-758X
1460-2695
DOI:10.1111/ffe.14274