| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
New Frontiers in Physical Metallurgy of Steels
|
| Presentation Title |
Improving the Fatigue Performance of Nitrided Steels with Amorphous and Crystalline Precipitates |
| Author(s) |
Jonah Klemm-Toole, Kip Findley |
| On-Site Speaker (Planned) |
Jonah Klemm-Toole |
| Abstract Scope |
Nitriding is a thermochemical process where nascent nitrogen is diffused into the surface of a component at temperatures where ferrite is stable in a steel. Elevated nitrogen contents lead to solid solution strengthening as well as precipitation strengthening if nitride forming elements are present in the steel. Both solute nitrogen and precipitates result in compressive residual stresses that improve fatigue performance. In this presentation, we discuss the microstructure property relationships of a series of experimental steels that contain both crystalline MX type vanadium containing nitrides as well as amorphous precipitates that contain silicon, manganese, and nitrogen. We demonstrate that alloying to promote amorphous nitride precipitation is a novel and feasible strategy to significantly improve the fatigue performance of nitrided medium carbon steels. |