Interpretation of ductile fracture toughness temperature dependence of a low strength steel in terms of a local approach

✍ Scribed by E Amar; A Pineau

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 779 KB
• Volume: 22
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(85)90044-x

✦ Synopsis

Fracture toughness and notch ductility tests were performed on two heats of A508 steel tested over the temperature range between 100°C and 450°C. Both types of experiments showed that the materials exhibited a ductility trough at temperatures close to 300°C. At this temperature tensile tests showed the existence of strain aging phenomenom. Tests on axisymmetric notched tensile specimens were used to derive the critical value for void growth, RJ Ro, used in a model for ductile fracture. A good correlation between J,c and R,IRo was observed. This was used to predict the variations ofJlc with temperature. A reasonable agreement between the predicted values and the experimental results is observed.