| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Effect of Carbon Content on the Critical Intergranular Fracture Stress in Tempered Martensitic Steels |
| Author(s) |
Masahide Yoshimura, Gabriel Arcuri, Hatem Zurob |
| On-Site Speaker (Planned) |
Masahide Yoshimura |
| Abstract Scope |
Effect of carbon (C) content (0.05 mass% to 0.3 mass%) on the critical intergranular fracture stress of tempered martensitic steel was investigated using 3 mass% manganese (Mn) steel. The critical intergranular fracture stress was determined by calculating the maximum principal stress at fracture in a circumferential notched tensile specimen using elastoplastic finite element analysis. The measurement of segregation at grain boundaries was conducted using Atom Probe Tomography. The results revealed that the critical intergranular fracture stress of tempered martensitic steel increased with increasing the C content. This phenomenon is attributed to the refinement of the substructure of martensite. This refinement affects crack initiation resistance in intergranular fracture through the stress concentration at grain boundaries and the distance of dislocation accumulation. Furthermore, changes in the amount of segregation at grain boundaries resulting from an increase in C content are also examined. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Characterization |