Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 686, Issue -, Pages 134-141Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2017.01.042
Keywords
Cleavage fracture; Stress triaxiality; Lode angle; Equivalent plastic strain
Categories
Funding
- China Scholarship Council (CSC)
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Mechanical tests of a ferritic-pearlitic steel were conducted at -196 degrees C with various specimen geometries resulting in different stress states. Elastic-plastic finite element method (FEM) simulations were used to analyze the local stress and strain distributions of the studied steel. It is found that cementite lamellae are the initiation sites for cleavage fracture. In addition, the cleavage fracture critical stage and the local equivalent plastic strain at initiation site varies with stress triaxiality and Lode angle.
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