Influence of Al and N Content and Cooling Rate on the Characteristics of Complex MnS Inclusions in AHSS
This study focused on the characteristics of complex MnS inclusions in advanced high strength steels. The effect of metal chemistry (Al and N) and the cooling rate of steel were evaluated by analyzing the inclusions present in five laboratory produced steels. The observed complex MnS inclusions cont...
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| Format: | Article |
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MDPI AG
2020-11-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/10/11/1054 |
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| author | Muhammad Nabeel Michelia Alba Neslihan Dogan |
| author_facet | Muhammad Nabeel Michelia Alba Neslihan Dogan |
| author_sort | Muhammad Nabeel |
| collection | DOAJ |
| description | This study focused on the characteristics of complex MnS inclusions in advanced high strength steels. The effect of metal chemistry (Al and N) and the cooling rate of steel were evaluated by analyzing the inclusions present in five laboratory produced steels. The observed complex MnS inclusions contained Al<sub>2</sub>O<sub>3</sub>-MnS, AlN-MnS, and AlON-MnS. An increase in Al content from 0.5% to 6% increased the number of complex MnS inclusions by ~4 times. In comparison, a decrease of ~80% was observed due to the increased N content of steel from <10 ppm to ~50 ppm. MnS precipitation ratio was used to determine the potency of different inclusions forming complex MnS inclusions due to heterogeneous nucleation. It was found that the MnS precipitation ratio of the observed inclusions was related to their misfit with MnS, and it decreased in the order of AlN > AlON > Al<sub>2</sub>O<sub>3</sub>. Moreover, it was determined that AlN particles could be easily engulfed at the solidification front relative to Al<sub>2</sub>O<sub>3</sub>, which resulted in a higher MnS precipitation ratio for Al<sub>2</sub>O<sub>3</sub> under slow cooling conditions. |
| first_indexed | 2024-03-10T14:43:30Z |
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| id | doaj.art-057d97417cfa4ae79920d5b0b86211e2 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T14:43:30Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-057d97417cfa4ae79920d5b0b86211e22023-11-20T21:34:50ZengMDPI AGCrystals2073-43522020-11-011011105410.3390/cryst10111054Influence of Al and N Content and Cooling Rate on the Characteristics of Complex MnS Inclusions in AHSSMuhammad Nabeel0Michelia Alba1Neslihan Dogan2Department of Material Science and Engineering, Faculty of Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, CanadaDepartment of Material Science and Engineering, Faculty of Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, CanadaDepartment of Material Science and Engineering, Faculty of Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, CanadaThis study focused on the characteristics of complex MnS inclusions in advanced high strength steels. The effect of metal chemistry (Al and N) and the cooling rate of steel were evaluated by analyzing the inclusions present in five laboratory produced steels. The observed complex MnS inclusions contained Al<sub>2</sub>O<sub>3</sub>-MnS, AlN-MnS, and AlON-MnS. An increase in Al content from 0.5% to 6% increased the number of complex MnS inclusions by ~4 times. In comparison, a decrease of ~80% was observed due to the increased N content of steel from <10 ppm to ~50 ppm. MnS precipitation ratio was used to determine the potency of different inclusions forming complex MnS inclusions due to heterogeneous nucleation. It was found that the MnS precipitation ratio of the observed inclusions was related to their misfit with MnS, and it decreased in the order of AlN > AlON > Al<sub>2</sub>O<sub>3</sub>. Moreover, it was determined that AlN particles could be easily engulfed at the solidification front relative to Al<sub>2</sub>O<sub>3</sub>, which resulted in a higher MnS precipitation ratio for Al<sub>2</sub>O<sub>3</sub> under slow cooling conditions.https://www.mdpi.com/2073-4352/10/11/1054complex MnSheterogeneous nucleationprecipitation ratioengulfment and pushingmisfitAlN inclusions |
| spellingShingle | Muhammad Nabeel Michelia Alba Neslihan Dogan Influence of Al and N Content and Cooling Rate on the Characteristics of Complex MnS Inclusions in AHSS Crystals complex MnS heterogeneous nucleation precipitation ratio engulfment and pushing misfit AlN inclusions |
| title | Influence of Al and N Content and Cooling Rate on the Characteristics of Complex MnS Inclusions in AHSS |
| title_full | Influence of Al and N Content and Cooling Rate on the Characteristics of Complex MnS Inclusions in AHSS |
| title_fullStr | Influence of Al and N Content and Cooling Rate on the Characteristics of Complex MnS Inclusions in AHSS |
| title_full_unstemmed | Influence of Al and N Content and Cooling Rate on the Characteristics of Complex MnS Inclusions in AHSS |
| title_short | Influence of Al and N Content and Cooling Rate on the Characteristics of Complex MnS Inclusions in AHSS |
| title_sort | influence of al and n content and cooling rate on the characteristics of complex mns inclusions in ahss |
| topic | complex MnS heterogeneous nucleation precipitation ratio engulfment and pushing misfit AlN inclusions |
| url | https://www.mdpi.com/2073-4352/10/11/1054 |
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