| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Steels for Sustainable Development III
|
| Presentation Title |
Quantification of Coarse TiN-Rich Precipitates in Hhigh Strength Microalloyed Steels |
| Author(s) |
Tamara Kazoun, Ry Karl, J. Barry Wiskel, Doug Ivey, Chad Cathcart, Tihe (Tom) Zhou, Hani Henein |
| On-Site Speaker (Planned) |
Hani Henein |
| Abstract Scope |
Microalloyed steels are a subset of alloys that contain niobium (Nb), vanadium (V), and/or titanium (Ti), with their total weight percent not exceeding 0.1%. During thermo mechanically controlled processing, these elements form nitride and/or carbide precipitates of various types and sizes. In this work, the number of large (> 1 μm) TiN that precipitate on calcium sulfide (CaS) inclusions and/or that form (Ti,Nb)N precipitates was analyzed in seven steels with varying Ti and Nb compositions. The analysis was undertaken using electron probe microscopy analysis (EMPA), scanning electron microscopy (SEM), and energy dispersive x-ray (EDX) spectroscopy. The amount of TiN precipitating on CaS was relatively independent of the Ti composition and observed to be ≥ 5 μm. Conversely, the TiN that did not precipitate on CaS were generally smaller in size (1-3 μm). The majority of the (Ti,Nb)N precipitates were observed to be in the 1 – 2 μm size range. |