Effects of Al, Si and N Content on the Formation of M-A Constituent and HAZ Toughness of Ti-Containing Low-Carbon Steel
| Autor: | Hong Chul Jeong, Joo Hyeon Cha, Kook Soo Bang, Kyutae Han |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Toughness Materials science Carbon steel Mechanical Engineering Metallurgy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Mechanics of Materials 0103 physical sciences engineering General Materials Science Microalloyed steel 0210 nano-technology |
| Zdroj: | Materials Science Forum. 1016:42-49 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.1016.42 |
| Popis: | The present work investigated the effects of Al, Si, and N content on the impact toughness of the coarse-grained heat-affected zone (CGHAZ) of Ti-containing low-carbon steel. Simulated CGHAZ of differing Al, Si, and N contents were prepared, and Charpy impact toughness was determined. The results were interpreted in terms of microstructure, especially martensite-austenite (M-A) constituent. All elements accelerated ferrite transformation in CGHAZ but at the same time increased the amount of M-A constituent, thereby deteriorating CGHAZ toughness. It is believed that Al, Si, and free N that is uncombined with Ti retard the decomposition of austenite into pearlite and increase the carbon content in the last transforming austenite, thus increasing the amount of M-A constituent. Regardless of the amount of ferrite in CGHAZ, its toughness decreased linearly with an increase of M-A constituent in this experiment, indicating that HAZ toughness is predominantly affected by the presence of M-A constituent. When a comparison of the effectiveness is made between Al and Si, it showed that a decrease in Si content is more effective in reducing M-A constituents. |
| Databáze: | OpenAIRE |
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