| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2024: Process-Structure-Property Relations and New Technologies
|
| Presentation Title |
G-5: Cryogenic Toughness of Austenitic Stainless Steels After Aging |
| Author(s) |
Maribel Leticia Saucedo-Muñoz, Victor Manuel Lopez-Hirata, Jose David Villegas-Cardenas, Felipe Hernandez-Santiago |
| On-Site Speaker (Planned) |
Victor Manuel Lopez-Hirata |
| Abstract Scope |
A study of the effect of precipitation on the fracture toughness at cryogenic temperatures was carried out in two austenitic stainless steels: a nitrogen-containing steel and 316-type steel, after isothermal aging. Both steels were solution treated, cold-water quenched and then aged at temperatures of 600, 700, 800 and 900 °C for times between 10 and 1000 min. The precipitation of these steels was characterized with a scanning electron microscope and precipitates were analyzed by X-ray diffraction analysis of extracted precipitates, after electrolytic dissolution of austenitic matrix. The fracture toughness of steels was evaluated by the Charpy V-notch impact testing at -196°C, and fracture surfaces were observed in a scanning electron microscope. The results showed an intergranular precipitation of carbides M23C6 for both aged steels. The decrease in Charpy impact energy with aging time was higher in the N-containing steel, which is associated with its higher percentage of intergranular precipitation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Characterization, Phase Transformations |