Journal
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
Volume 38, Issue 12, Pages 1466-1477Publisher
WILEY
DOI: 10.1111/ffe.12316
Keywords
cast stainless steel CF8M; finite element damage analysis; J-R curve prediction; multi-axial fracture strain locus
Funding
- Power Generation & Electricity Delivery of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Knowledge Economy, Republic of Korea [20101020300710]
- Engineering Research Center Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2007-0056094]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20101020300710] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This paper proposes a method to predict the thermal ageing effect on fracture toughness of CF8M cast stainless steel. The proposed method is based on multi-axial fracture strain combined with finite element damage analysis to simulate ductile tearing. Multi-axial fracture strain loci of un-aged and aged CF8M are determined by analyzing notched bar tensile test. It is shown that the thermal ageing effect on multi-axial fracture strain loci can be characterized by one constant. It is further shown that J-resistance curves of un-aged and aged CF8M can be predicted well from finite element damage analysis using multi-axial fracture strain loci. Implication of present results to practical application of crack assessment of aged cast stainless steels is discussed.
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