Effect of loading modes on torsional behavior of an extruded Mg alloy bar
The torsional deformation with shear stress is crucial for improving mechanical performance of wrought Mg alloys. Consequently, the difference of mechanical behavior between fixed-end and free-end torsion was investigated. It is found that strain hardening behavior is affected by end constraint. The...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422008973 |
| _version_ | 1817999747411083264 |
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| author | Chong Yang Guoguo Zhu Bin Li Yan Peng Baodong Shi |
| author_facet | Chong Yang Guoguo Zhu Bin Li Yan Peng Baodong Shi |
| author_sort | Chong Yang |
| collection | DOAJ |
| description | The torsional deformation with shear stress is crucial for improving mechanical performance of wrought Mg alloys. Consequently, the difference of mechanical behavior between fixed-end and free-end torsion was investigated. It is found that strain hardening behavior is affected by end constraint. The decreased hardening rate is exhibited which is dominated by prismatic slip during fixed-end torsion. For free-end loading, two stages of strain hardening are presented during torsion, i.e., constant hardening rate and slowly decreased hardening rate. The basal slip dominates the onset of plastic deformation. The prismatic slip becomes dominated mechanism at large shear strain. However, the axial effect is sensitive to forward and reversal torsion. The difference of axial stress between forward and reversal torsion under fixed-end is attributed to twin growth. The difference of axial strain is small during forward and reversal torsion under free-end, which is attributed to the activation of tensile twinning. |
| first_indexed | 2024-04-14T03:13:09Z |
| format | Article |
| id | doaj.art-eb18e357c9ce49acbc22535dc2ba092d |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-14T03:13:09Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-eb18e357c9ce49acbc22535dc2ba092d2022-12-22T02:15:33ZengElsevierJournal of Materials Research and Technology2238-78542022-07-011928882894Effect of loading modes on torsional behavior of an extruded Mg alloy barChong Yang0Guoguo Zhu1Bin Li2Yan Peng3Baodong Shi4National Engineering Research Center for Equipment and Technology of Cold Rolled Strip, School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, PR China; Henan International Joint Laboratory of Cutting Tools and Precision Machining, School of Intelligent Manufacturing, Luoyang Institute of Science and Technology, Luoyang 471023, PR ChinaNational Engineering Research Center for Equipment and Technology of Cold Rolled Strip, School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, PR ChinaHenan International Joint Laboratory of Cutting Tools and Precision Machining, School of Intelligent Manufacturing, Luoyang Institute of Science and Technology, Luoyang 471023, PR ChinaNational Engineering Research Center for Equipment and Technology of Cold Rolled Strip, School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, PR ChinaNational Engineering Research Center for Equipment and Technology of Cold Rolled Strip, School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, PR China; State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China; Corresponding author.The torsional deformation with shear stress is crucial for improving mechanical performance of wrought Mg alloys. Consequently, the difference of mechanical behavior between fixed-end and free-end torsion was investigated. It is found that strain hardening behavior is affected by end constraint. The decreased hardening rate is exhibited which is dominated by prismatic slip during fixed-end torsion. For free-end loading, two stages of strain hardening are presented during torsion, i.e., constant hardening rate and slowly decreased hardening rate. The basal slip dominates the onset of plastic deformation. The prismatic slip becomes dominated mechanism at large shear strain. However, the axial effect is sensitive to forward and reversal torsion. The difference of axial stress between forward and reversal torsion under fixed-end is attributed to twin growth. The difference of axial strain is small during forward and reversal torsion under free-end, which is attributed to the activation of tensile twinning.http://www.sciencedirect.com/science/article/pii/S2238785422008973Magnesium alloyTorsionStrain hardeningAxial effectTwinning |
| spellingShingle | Chong Yang Guoguo Zhu Bin Li Yan Peng Baodong Shi Effect of loading modes on torsional behavior of an extruded Mg alloy bar Journal of Materials Research and Technology Magnesium alloy Torsion Strain hardening Axial effect Twinning |
| title | Effect of loading modes on torsional behavior of an extruded Mg alloy bar |
| title_full | Effect of loading modes on torsional behavior of an extruded Mg alloy bar |
| title_fullStr | Effect of loading modes on torsional behavior of an extruded Mg alloy bar |
| title_full_unstemmed | Effect of loading modes on torsional behavior of an extruded Mg alloy bar |
| title_short | Effect of loading modes on torsional behavior of an extruded Mg alloy bar |
| title_sort | effect of loading modes on torsional behavior of an extruded mg alloy bar |
| topic | Magnesium alloy Torsion Strain hardening Axial effect Twinning |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422008973 |
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