About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-93: Processing History, Microstructure, and Low Cycle Fatigue Behavior in Carbide Free Bainite and Tempered Martensitic Steels of Equivalent Hardness |
| Author(s) |
Mitchell H. Shields |
| On-Site Speaker (Planned) |
Mitchell H. Shields |
| Abstract Scope |
Recent advances in steel alloying have allowed for the formation of carbide free bainitic microstructures via controlled cooling after austenitization. In this study, bainitic microstructures are formed by either a controlled cooling process or an austempering process to evaluate the relationship between microstructure and mechanical properties in a 0.2C - 2Mn - 1.5Si - 0.8Cr steel containing small amounts of Nb, Ti, B, and N. When compared to microstructures produced via austempering, microstructures produced with a controlled cool exhibit an increased variety of transformation products, specifically regarding the size and distribution of martensite-austenite and granular bainitic constituents within a lath-like bainitic ferrite matrix. These carbide free bainitic conditions are tested under strain-controlled uniaxial low cycle fatigue with a total strain amplitude of 0.4 pct and R = -1. The low cycle fatigue results are compared to those of a quenched and tempered 4140 steel of equivalent hardness. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Iron and Steel, Phase Transformations, Mechanical Properties |