Hot compression deformation behavior and dynamic recrystallization of a precipitate-free Mg–Bi–Sn alloy
The addition of Sn improves the properties of Mg–Bi-based alloys, and can potentially overcome the high-temperature limitations of magnesium (Mg) alloys. However, high-Sn alloying leads to stress concentration during hot extrusion. Hence, in this study, the dynamic recrystallization (DRX) mechanism...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-07-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423012310 |
| _version_ | 1797745279607242752 |
|---|---|
| author | Guo-lei Liu Wei-li Cheng Lin Luo Hui Yu Li-fei Wang Hang Li Hong-xia Wang Jin-hui Wang |
| author_facet | Guo-lei Liu Wei-li Cheng Lin Luo Hui Yu Li-fei Wang Hang Li Hong-xia Wang Jin-hui Wang |
| author_sort | Guo-lei Liu |
| collection | DOAJ |
| description | The addition of Sn improves the properties of Mg–Bi-based alloys, and can potentially overcome the high-temperature limitations of magnesium (Mg) alloys. However, high-Sn alloying leads to stress concentration during hot extrusion. Hence, in this study, the dynamic recrystallization (DRX) mechanism and hot-deformation behavior of a novel precipitate-free Mg–0.25Bi–0.25Sn alloy during hot compression conducted at 250–400 °C with strain rate of 0.001–1 s−1 were examined in detail by constructing processing maps and deriving constitutive equation. The obtained correlation coefficient was 0.99113, indicating that the proposed method can adequately predict the hot deformation behavior of the studied alloy. The calculated average activation energy was 143.0336 kJ/mol. According to the processing maps, the ideal processing areas corresponded to the conditions of 300–400 °C/0.001 s−1/1 s−1 and 400 °C/0.1 s−1. In addition, a transformation of prismatic <a> slip to pyramidal II <c+a> slip was observed at 350 °C, and the continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) processes occurred during hot compression. The classification of the dominant DRX mechanisms was based on the Zener–Hollomon parameter (Z). Under high-Z deformation conditions, CDRX and DDRX occurred simultaneously; however, CDRX was the predominant process. Under medium-Z deformation conditions, DDRX was the only DRX process. Under low-Z deformation conditions, DDRX dominated over the DRX mechanism and was partially accompanied by CDRX. |
| first_indexed | 2024-03-12T15:21:07Z |
| format | Article |
| id | doaj.art-b764693f39464d76a67cb92e962d88bb |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:21:07Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-b764693f39464d76a67cb92e962d88bb2023-08-11T05:33:07ZengElsevierJournal of Materials Research and Technology2238-78542023-07-0125497510Hot compression deformation behavior and dynamic recrystallization of a precipitate-free Mg–Bi–Sn alloyGuo-lei Liu0Wei-li Cheng1Lin Luo2Hui Yu3Li-fei Wang4Hang Li5Hong-xia Wang6Jin-hui Wang7School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Corresponding author.School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300132, ChinaSchool of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaQinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining 810016, ChinaThe addition of Sn improves the properties of Mg–Bi-based alloys, and can potentially overcome the high-temperature limitations of magnesium (Mg) alloys. However, high-Sn alloying leads to stress concentration during hot extrusion. Hence, in this study, the dynamic recrystallization (DRX) mechanism and hot-deformation behavior of a novel precipitate-free Mg–0.25Bi–0.25Sn alloy during hot compression conducted at 250–400 °C with strain rate of 0.001–1 s−1 were examined in detail by constructing processing maps and deriving constitutive equation. The obtained correlation coefficient was 0.99113, indicating that the proposed method can adequately predict the hot deformation behavior of the studied alloy. The calculated average activation energy was 143.0336 kJ/mol. According to the processing maps, the ideal processing areas corresponded to the conditions of 300–400 °C/0.001 s−1/1 s−1 and 400 °C/0.1 s−1. In addition, a transformation of prismatic <a> slip to pyramidal II <c+a> slip was observed at 350 °C, and the continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) processes occurred during hot compression. The classification of the dominant DRX mechanisms was based on the Zener–Hollomon parameter (Z). Under high-Z deformation conditions, CDRX and DDRX occurred simultaneously; however, CDRX was the predominant process. Under medium-Z deformation conditions, DDRX was the only DRX process. Under low-Z deformation conditions, DDRX dominated over the DRX mechanism and was partially accompanied by CDRX.http://www.sciencedirect.com/science/article/pii/S2238785423012310Dilute Mg alloyHot compressionProcessing mapConstitutive equationDynamic recrystallization |
| spellingShingle | Guo-lei Liu Wei-li Cheng Lin Luo Hui Yu Li-fei Wang Hang Li Hong-xia Wang Jin-hui Wang Hot compression deformation behavior and dynamic recrystallization of a precipitate-free Mg–Bi–Sn alloy Journal of Materials Research and Technology Dilute Mg alloy Hot compression Processing map Constitutive equation Dynamic recrystallization |
| title | Hot compression deformation behavior and dynamic recrystallization of a precipitate-free Mg–Bi–Sn alloy |
| title_full | Hot compression deformation behavior and dynamic recrystallization of a precipitate-free Mg–Bi–Sn alloy |
| title_fullStr | Hot compression deformation behavior and dynamic recrystallization of a precipitate-free Mg–Bi–Sn alloy |
| title_full_unstemmed | Hot compression deformation behavior and dynamic recrystallization of a precipitate-free Mg–Bi–Sn alloy |
| title_short | Hot compression deformation behavior and dynamic recrystallization of a precipitate-free Mg–Bi–Sn alloy |
| title_sort | hot compression deformation behavior and dynamic recrystallization of a precipitate free mg bi sn alloy |
| topic | Dilute Mg alloy Hot compression Processing map Constitutive equation Dynamic recrystallization |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423012310 |
| work_keys_str_mv | AT guoleiliu hotcompressiondeformationbehavioranddynamicrecrystallizationofaprecipitatefreemgbisnalloy AT weilicheng hotcompressiondeformationbehavioranddynamicrecrystallizationofaprecipitatefreemgbisnalloy AT linluo hotcompressiondeformationbehavioranddynamicrecrystallizationofaprecipitatefreemgbisnalloy AT huiyu hotcompressiondeformationbehavioranddynamicrecrystallizationofaprecipitatefreemgbisnalloy AT lifeiwang hotcompressiondeformationbehavioranddynamicrecrystallizationofaprecipitatefreemgbisnalloy AT hangli hotcompressiondeformationbehavioranddynamicrecrystallizationofaprecipitatefreemgbisnalloy AT hongxiawang hotcompressiondeformationbehavioranddynamicrecrystallizationofaprecipitatefreemgbisnalloy AT jinhuiwang hotcompressiondeformationbehavioranddynamicrecrystallizationofaprecipitatefreemgbisnalloy |