Chemical and mechanical properties of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys): A review
This review article provides overall understanding of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys) recently developed at the Korea Institute of Materials Science. SEN alloys are produced by adding small amounts of Ca and Y (each <1 wt%) into commercial Mg–Al based allo...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-03-01
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| Series: | Journal of Magnesium and Alloys |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956724000987 |
| _version_ | 1797210009649545216 |
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| author | Jong Un Lee Hyun Ji Kim Sang-Cheol Jin Ye Jin Kim Young Min Kim Bong Sun You Jun Ho Bae Sung Hyuk Park |
| author_facet | Jong Un Lee Hyun Ji Kim Sang-Cheol Jin Ye Jin Kim Young Min Kim Bong Sun You Jun Ho Bae Sung Hyuk Park |
| author_sort | Jong Un Lee |
| collection | DOAJ |
| description | This review article provides overall understanding of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys) recently developed at the Korea Institute of Materials Science. SEN alloys are produced by adding small amounts of Ca and Y (each <1 wt%) into commercial Mg–Al based alloys, resulting in exceptional ignition and corrosion resistances and impressive mechanical properties. Their main advantages of SEN alloys are as follows. (1) A dense multi-oxide layer of SEN alloys comprising MgO, CaO, and Y2O3 impedes the outward dispersion of Mg vapor and the inward penetration of O2 during oxidation, thereby enhancing the oxidation and ignition resistances. (2) The presence of Ca- and Y-based second-phase particles in SEN alloys can enhance their corrosion resistance because Ca-containing particles prevent the spread of corrosion, and the replacement of Al-containing particles with less noble ones containing Y (e.g., Al–Mn–Y or Al–Y particles) retards corrosion. (3) The addition of minor amounts of Ca and Y renders excellent mechanical properties due to improved strengthening effects. These enhanced properties are attributed to more pronounced dynamic recrystallization and grain refining behaviors caused by the second-phase particles during extrusion. (4) Despite the presence of various types of second-phase particles, the fatigue properties of SEN9 alloys are similar to those of commercial AZ91 alloys. (5) Simultaneous introduction of Ca and Y suppresses the formation of Mg17Al12 discontinuous precipitates during aging, leading to the enhanced elongation of aged SEN alloys. (6) Adding mischmetal into the SEN9 alloy leads to a six-fold enhancement in extrudability. Consequently, the studies conducted on SEN alloys demonstrate their excellent ignition and corrosion resistances and mechanical properties, which broaden the industrial applications of Mg alloys by addressing their inherent weaknesses. |
| first_indexed | 2024-04-24T10:03:47Z |
| format | Article |
| id | doaj.art-148059d397574ce88e4b8a3bdcf7f742 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-24T10:03:47Z |
| publishDate | 2024-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-148059d397574ce88e4b8a3bdcf7f7422024-04-13T04:21:19ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672024-03-01123841872Chemical and mechanical properties of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys): A reviewJong Un Lee0Hyun Ji Kim1Sang-Cheol Jin2Ye Jin Kim3Young Min Kim4Bong Sun You5Jun Ho Bae6Sung Hyuk Park7Advanced Metals Division, Korea Institute of Materials Science, Changwon 51508, Republic of KoreaDepartment of Materials Science and Metallurgical Engineering, Kyungpook National University, Daegu 41566, Republic of KoreaDepartment of Materials Science and Metallurgical Engineering, Kyungpook National University, Daegu 41566, Republic of KoreaMissile Research Institute, Agency for Defense Development, Daejeon 34060, Republic of KoreaAdvanced Metals Division, Korea Institute of Materials Science, Changwon 51508, Republic of KoreaAdvanced Metals Division, Korea Institute of Materials Science, Changwon 51508, Republic of KoreaAdvanced Metals Division, Korea Institute of Materials Science, Changwon 51508, Republic of KoreaDepartment of Materials Science and Metallurgical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea; Corresponding author.This review article provides overall understanding of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys) recently developed at the Korea Institute of Materials Science. SEN alloys are produced by adding small amounts of Ca and Y (each <1 wt%) into commercial Mg–Al based alloys, resulting in exceptional ignition and corrosion resistances and impressive mechanical properties. Their main advantages of SEN alloys are as follows. (1) A dense multi-oxide layer of SEN alloys comprising MgO, CaO, and Y2O3 impedes the outward dispersion of Mg vapor and the inward penetration of O2 during oxidation, thereby enhancing the oxidation and ignition resistances. (2) The presence of Ca- and Y-based second-phase particles in SEN alloys can enhance their corrosion resistance because Ca-containing particles prevent the spread of corrosion, and the replacement of Al-containing particles with less noble ones containing Y (e.g., Al–Mn–Y or Al–Y particles) retards corrosion. (3) The addition of minor amounts of Ca and Y renders excellent mechanical properties due to improved strengthening effects. These enhanced properties are attributed to more pronounced dynamic recrystallization and grain refining behaviors caused by the second-phase particles during extrusion. (4) Despite the presence of various types of second-phase particles, the fatigue properties of SEN9 alloys are similar to those of commercial AZ91 alloys. (5) Simultaneous introduction of Ca and Y suppresses the formation of Mg17Al12 discontinuous precipitates during aging, leading to the enhanced elongation of aged SEN alloys. (6) Adding mischmetal into the SEN9 alloy leads to a six-fold enhancement in extrudability. Consequently, the studies conducted on SEN alloys demonstrate their excellent ignition and corrosion resistances and mechanical properties, which broaden the industrial applications of Mg alloys by addressing their inherent weaknesses.http://www.sciencedirect.com/science/article/pii/S2213956724000987SEN magnesium alloyCorrosion resistanceIgnition resistanceMechanical propertiesExtrudability |
| spellingShingle | Jong Un Lee Hyun Ji Kim Sang-Cheol Jin Ye Jin Kim Young Min Kim Bong Sun You Jun Ho Bae Sung Hyuk Park Chemical and mechanical properties of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys): A review Journal of Magnesium and Alloys SEN magnesium alloy Corrosion resistance Ignition resistance Mechanical properties Extrudability |
| title | Chemical and mechanical properties of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys): A review |
| title_full | Chemical and mechanical properties of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys): A review |
| title_fullStr | Chemical and mechanical properties of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys): A review |
| title_full_unstemmed | Chemical and mechanical properties of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys): A review |
| title_short | Chemical and mechanical properties of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys): A review |
| title_sort | chemical and mechanical properties of stainless environment friendly and nonflammable mg alloys sen alloys a review |
| topic | SEN magnesium alloy Corrosion resistance Ignition resistance Mechanical properties Extrudability |
| url | http://www.sciencedirect.com/science/article/pii/S2213956724000987 |
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