| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-58: Effects of Inclusions on Fatigue Behavior of High Strength Bar Steel |
| Author(s) |
Natalie A. Compton, Kip Findley |
| On-Site Speaker (Planned) |
Natalie A. Compton |
| Abstract Scope |
Nonmetallic inclusions within high-strength steels, specifically globular oxides, can be detrimental and significantly decrease fatigue life. To address this, the study compares two cleanliness levels of 4140 quench and tempered martensitic steel. The material was austenitized at 885°C for 30 minutes, oil quenched and then tempered at 177°C for 1 hour and air cooled to have a resultant hardness of 53 HRC. Each material group’s inclusion populations were characterized by utilizing two different methodologies; ultrasonic testing and an automated scanning electron microscope analysis. Specimens of each material group were tested in rotating bending fatigue and their endurance limits were found. Fractography and inclusion characterization were performed on all fatigue failures. Mathematical and finite element analysis modeling was then utilized to study how the size and location of the inclusion affects the fatigue life of the material.
|
| Proceedings Inclusion? |
Undecided |
| Keywords |
Iron and Steel, |