| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Innovative Process Design and Processing for Advanced Structural Materials
|
| Presentation Title |
K--8: Effect of Heat Treatment in 9% Ni Steels on Cryogenic Impact Toughness |
| Author(s) |
Younghoon Kim, Eunji Song, Sohyeon Lee, Minho Park, Hyunbo Shim, Ju-Young Kim |
| On-Site Speaker (Planned) |
Sohyeon Lee |
| Abstract Scope |
Recently, the application of alternative energy is expanding due to the reinforcement of eco-friendly policies so, the demand for the development of cryogenic materials that can be used for storage/transportation of eco-friendly fuels is increasing. In cryogenic temperature, material becomes brittle because of ductile to brittle transition (DBTT). Therefore, cryogenic material should have good cryogenic toughness. Retained austenite (RA) play an important role in affecting cryogenic toughness. Since the microstructure and mechanical properties are affected by the heat treatment, it is necessary to understand the effect of the heat process.
In this study, we analyze the microstructure and mechanical property of 9 % Ni steels which are produced by QT (Quenching and tempering) process and QLT (L: lamellarizing) process, respectively. We compare volume fraction, morphology and distribution of RA. Also, we compare mechanical property by using indentation size effect of nanoindentation. This work was supported by Hyundai Steel. |