Effect of Initial Microstructure Prior to Extrusion on the Microstructure and Mechanical Properties of Extruded AZ80 Alloy with a Low Temperature and a Low Ratio
Abstract Magnesium (Mg) alloys are the lightest metal structural material for engineering applications and therefore have a wide market of applications. However, compared to steel and aluminum alloys, Mg alloys have lower mechanical properties, which greatly limits their application. Extrusion is on...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-06-01
|
| Series: | Chinese Journal of Mechanical Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s10033-023-00901-w |
| _version_ | 1797795767441686528 |
|---|---|
| author | Hang Zhang Haipeng Li Rongguang Li Boshu Liu Ruizhi Wu Dongyue Zhao Shanshan Li |
| author_facet | Hang Zhang Haipeng Li Rongguang Li Boshu Liu Ruizhi Wu Dongyue Zhao Shanshan Li |
| author_sort | Hang Zhang |
| collection | DOAJ |
| description | Abstract Magnesium (Mg) alloys are the lightest metal structural material for engineering applications and therefore have a wide market of applications. However, compared to steel and aluminum alloys, Mg alloys have lower mechanical properties, which greatly limits their application. Extrusion is one of the most important processing methods for Mg and its alloys. However, the effect of such a heterogeneous microstructure achieved at low temperatures on the mechanical properties is lacking investigation. In this work, commercial AZ80 alloys with different initial microstructures (as-cast and as-homogenized) were selected and extruded at a low extrusion temperature of 220 °C and a low extrusion ratio of 4. The microstructure and mechanical properties of the two extruded AZ80 alloys were investigated. The results show that homogenized-extruded (HE) sample exhibits higher strength than the cast-extruded (CE) sample, which is mainly attributed to the high number density of fine dynamic precipitates and the high fraction of recrystallized ultrafine grains. Compared to the coarse compounds existing in CE sample, the fine dynamical precipitates of Mg17(Al, Zn)12 form in the HE sample can effectively promote the dynamical recrystallization during extrusion, while they exhibit a similar effect on the size and orientation of the recrystallized grains. These results can facilitate the designing of high-strength wrought magnesium alloys by rational microstructure construction. |
| first_indexed | 2024-03-13T03:23:00Z |
| format | Article |
| id | doaj.art-35bc31e645674db4b259a44ae8393a5c |
| institution | Directory Open Access Journal |
| issn | 2192-8258 |
| language | English |
| last_indexed | 2024-03-13T03:23:00Z |
| publishDate | 2023-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Chinese Journal of Mechanical Engineering |
| spelling | doaj.art-35bc31e645674db4b259a44ae8393a5c2023-06-25T11:10:56ZengSpringerOpenChinese Journal of Mechanical Engineering2192-82582023-06-0136111110.1186/s10033-023-00901-wEffect of Initial Microstructure Prior to Extrusion on the Microstructure and Mechanical Properties of Extruded AZ80 Alloy with a Low Temperature and a Low RatioHang Zhang0Haipeng Li1Rongguang Li2Boshu Liu3Ruizhi Wu4Dongyue Zhao5Shanshan Li6School of Mechanical and Power Engineering, Shenyang University of Chemical TechnologySchool of Mechanical and Power Engineering, Shenyang University of Chemical TechnologySchool of Mechanical and Power Engineering, Shenyang University of Chemical TechnologySchool of Mechanical and Power Engineering, Shenyang University of Chemical TechnologyKey Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering UniversityKey Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering UniversitySchool of Mechanical and Power Engineering, Shenyang University of Chemical TechnologyAbstract Magnesium (Mg) alloys are the lightest metal structural material for engineering applications and therefore have a wide market of applications. However, compared to steel and aluminum alloys, Mg alloys have lower mechanical properties, which greatly limits their application. Extrusion is one of the most important processing methods for Mg and its alloys. However, the effect of such a heterogeneous microstructure achieved at low temperatures on the mechanical properties is lacking investigation. In this work, commercial AZ80 alloys with different initial microstructures (as-cast and as-homogenized) were selected and extruded at a low extrusion temperature of 220 °C and a low extrusion ratio of 4. The microstructure and mechanical properties of the two extruded AZ80 alloys were investigated. The results show that homogenized-extruded (HE) sample exhibits higher strength than the cast-extruded (CE) sample, which is mainly attributed to the high number density of fine dynamic precipitates and the high fraction of recrystallized ultrafine grains. Compared to the coarse compounds existing in CE sample, the fine dynamical precipitates of Mg17(Al, Zn)12 form in the HE sample can effectively promote the dynamical recrystallization during extrusion, while they exhibit a similar effect on the size and orientation of the recrystallized grains. These results can facilitate the designing of high-strength wrought magnesium alloys by rational microstructure construction.https://doi.org/10.1186/s10033-023-00901-wMagnesium alloyLow temperature and low ratio extrusionBimodal grain structureDynamic precipitateDynamic recrystallization |
| spellingShingle | Hang Zhang Haipeng Li Rongguang Li Boshu Liu Ruizhi Wu Dongyue Zhao Shanshan Li Effect of Initial Microstructure Prior to Extrusion on the Microstructure and Mechanical Properties of Extruded AZ80 Alloy with a Low Temperature and a Low Ratio Chinese Journal of Mechanical Engineering Magnesium alloy Low temperature and low ratio extrusion Bimodal grain structure Dynamic precipitate Dynamic recrystallization |
| title | Effect of Initial Microstructure Prior to Extrusion on the Microstructure and Mechanical Properties of Extruded AZ80 Alloy with a Low Temperature and a Low Ratio |
| title_full | Effect of Initial Microstructure Prior to Extrusion on the Microstructure and Mechanical Properties of Extruded AZ80 Alloy with a Low Temperature and a Low Ratio |
| title_fullStr | Effect of Initial Microstructure Prior to Extrusion on the Microstructure and Mechanical Properties of Extruded AZ80 Alloy with a Low Temperature and a Low Ratio |
| title_full_unstemmed | Effect of Initial Microstructure Prior to Extrusion on the Microstructure and Mechanical Properties of Extruded AZ80 Alloy with a Low Temperature and a Low Ratio |
| title_short | Effect of Initial Microstructure Prior to Extrusion on the Microstructure and Mechanical Properties of Extruded AZ80 Alloy with a Low Temperature and a Low Ratio |
| title_sort | effect of initial microstructure prior to extrusion on the microstructure and mechanical properties of extruded az80 alloy with a low temperature and a low ratio |
| topic | Magnesium alloy Low temperature and low ratio extrusion Bimodal grain structure Dynamic precipitate Dynamic recrystallization |
| url | https://doi.org/10.1186/s10033-023-00901-w |
| work_keys_str_mv | AT hangzhang effectofinitialmicrostructurepriortoextrusiononthemicrostructureandmechanicalpropertiesofextrudedaz80alloywithalowtemperatureandalowratio AT haipengli effectofinitialmicrostructurepriortoextrusiononthemicrostructureandmechanicalpropertiesofextrudedaz80alloywithalowtemperatureandalowratio AT rongguangli effectofinitialmicrostructurepriortoextrusiononthemicrostructureandmechanicalpropertiesofextrudedaz80alloywithalowtemperatureandalowratio AT boshuliu effectofinitialmicrostructurepriortoextrusiononthemicrostructureandmechanicalpropertiesofextrudedaz80alloywithalowtemperatureandalowratio AT ruizhiwu effectofinitialmicrostructurepriortoextrusiononthemicrostructureandmechanicalpropertiesofextrudedaz80alloywithalowtemperatureandalowratio AT dongyuezhao effectofinitialmicrostructurepriortoextrusiononthemicrostructureandmechanicalpropertiesofextrudedaz80alloywithalowtemperatureandalowratio AT shanshanli effectofinitialmicrostructurepriortoextrusiononthemicrostructureandmechanicalpropertiesofextrudedaz80alloywithalowtemperatureandalowratio |