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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.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Austenite Decomposition during Hot-strip Rolling of Microalloyed Low-carbon Steel
Austenite Decomposition in the Coarse Grain Heat Affected Zone of X80 Line Pipe Steel
Improving the Fatigue Performance of Nitrided Steels with Amorphous and Crystalline Precipitates
Microstructural Engineering and Accelerated Test Method Development to Achieve Low Cost, High Performance Solutions for Hydrogen Storage and Delivery
Microstructural Modeling and Design in Triple Nano-precipitate Strengthened Austenitic Steel
Microstructure and Toughness Correlation in High Strength Q&T Boron Steels Microalloyed with Nb and Mo
Nano-precipitation and Resultant Surface Hardening by Nitriding of Ferrous Alloys
Nanoscale Investigation of Austenite/ferrite Interfaces in Medium Carbon Fe-Mn-C Steels at Different Inter-critical Temperatures
New Approach to Producing High Alloy Steels
Obtaining High Strength Ductility Combination by Quenching and Partitioning of Rolled Low Carbon Steel Sheet
Relationship between Fatigue Strength and Microstructure of Carburized Steel Tempered at Different Temperature
Simulation of the Nitriding and Ferritic Nitrocarburizing (FNC) Processes
Tribological Characterization of Silicon Stainless Steel Alloys

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