Comparative study on contribution of bimodal microstructure and heterogeneous microstructure to mechanical properties of ZK60 alloy
In this work, we compared the effects of bimodal microstructure and heterogeneous microstructure on the mechanical properties and strengthening mechanisms of ZK60 alloy. The bimodal microstructure is composed of coarse un-dynamically recrystallized (un-DRXed) grains with strong basal texture and fin...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424027418 |
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| author | Hang Zhang Yue Gao Rongguang Li Boshu Liu Shanshan Li Yan Tang Yuehong Zhang Gaowu Qin |
| author_facet | Hang Zhang Yue Gao Rongguang Li Boshu Liu Shanshan Li Yan Tang Yuehong Zhang Gaowu Qin |
| author_sort | Hang Zhang |
| collection | DOAJ |
| description | In this work, we compared the effects of bimodal microstructure and heterogeneous microstructure on the mechanical properties and strengthening mechanisms of ZK60 alloy. The bimodal microstructure is composed of coarse un-dynamically recrystallized (un-DRXed) grains with strong basal texture and fine dynamically recrystallized (DRXed) grains with weak texture, while the heterogeneous microstructure is composed of coarse DRXed grains and fine DRXed grains. The result suggests that high-density dislocations and high-density precipitates have significant contribution to the strength. The high-density dislocations in un-DRXed grains cause the formation of an uneven distribution of precipitates in the ZK60 alloy which results in the high yield strength of 305 MPa, ultimate tensile strength of 344 MPa and elongation of 12% in the bimodal-structured ZK60 alloy. In comparison, the heterogeneous-structured ZK60 alloy lacks the strengthening effect from high-density dislocations and precipitates, and a lower YS of 226 MPa, and UTS of 305 MPa are achieved. The result also indicates the weak texture, low density of dislocations, low density of precipitates, and stronger ability of storing dislocations in coarse grains for heterogeneous microstructure are helpful to the ductility. Thus, HE sample exhibits higher elongation of 23% than BI sample. The finding shed light on the microstructure designing of high-performance Mg alloys. |
| format | Article |
| id | doaj-art-5014391a344b49e7a66adfbb4cbe4926 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-5014391a344b49e7a66adfbb4cbe49262025-08-20T02:39:13ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01338687869710.1016/j.jmrt.2024.11.214Comparative study on contribution of bimodal microstructure and heterogeneous microstructure to mechanical properties of ZK60 alloyHang Zhang0Yue Gao1Rongguang Li2Boshu Liu3Shanshan Li4Yan Tang5Yuehong Zhang6Gaowu Qin7Institute for Strategic Materials and Components, Shenyang University of Chemical Technology, Shenyang, 110142, China; School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, ChinaInstitute for Strategic Materials and Components, Shenyang University of Chemical Technology, Shenyang, 110142, China; School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, ChinaInstitute for Strategic Materials and Components, Shenyang University of Chemical Technology, Shenyang, 110142, China; School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, China; Corresponding author. Institute for Strategic Materials and Components, Shenyang University of Chemical Technology, Shenyang, 110142, China.Institute for Strategic Materials and Components, Shenyang University of Chemical Technology, Shenyang, 110142, China; School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, China; Corresponding author. Institute for Strategic Materials and Components, Shenyang University of Chemical Technology, Shenyang, 110142, China.Institute for Strategic Materials and Components, Shenyang University of Chemical Technology, Shenyang, 110142, China; School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, ChinaInstitute for Strategic Materials and Components, Shenyang University of Chemical Technology, Shenyang, 110142, China; School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, ChinaInstrumental Analysis Center, Shenyang University of Chemical Technology, Shenyang, 110142, ChinaInstitute for Strategic Materials and Components, Shenyang University of Chemical Technology, Shenyang, 110142, China; Key Laboratory for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang, 110189, ChinaIn this work, we compared the effects of bimodal microstructure and heterogeneous microstructure on the mechanical properties and strengthening mechanisms of ZK60 alloy. The bimodal microstructure is composed of coarse un-dynamically recrystallized (un-DRXed) grains with strong basal texture and fine dynamically recrystallized (DRXed) grains with weak texture, while the heterogeneous microstructure is composed of coarse DRXed grains and fine DRXed grains. The result suggests that high-density dislocations and high-density precipitates have significant contribution to the strength. The high-density dislocations in un-DRXed grains cause the formation of an uneven distribution of precipitates in the ZK60 alloy which results in the high yield strength of 305 MPa, ultimate tensile strength of 344 MPa and elongation of 12% in the bimodal-structured ZK60 alloy. In comparison, the heterogeneous-structured ZK60 alloy lacks the strengthening effect from high-density dislocations and precipitates, and a lower YS of 226 MPa, and UTS of 305 MPa are achieved. The result also indicates the weak texture, low density of dislocations, low density of precipitates, and stronger ability of storing dislocations in coarse grains for heterogeneous microstructure are helpful to the ductility. Thus, HE sample exhibits higher elongation of 23% than BI sample. The finding shed light on the microstructure designing of high-performance Mg alloys.http://www.sciencedirect.com/science/article/pii/S2238785424027418Bimodal microstructureHeterogeneous microstructureZK60 alloyMechanical properties |
| spellingShingle | Hang Zhang Yue Gao Rongguang Li Boshu Liu Shanshan Li Yan Tang Yuehong Zhang Gaowu Qin Comparative study on contribution of bimodal microstructure and heterogeneous microstructure to mechanical properties of ZK60 alloy Journal of Materials Research and Technology Bimodal microstructure Heterogeneous microstructure ZK60 alloy Mechanical properties |
| title | Comparative study on contribution of bimodal microstructure and heterogeneous microstructure to mechanical properties of ZK60 alloy |
| title_full | Comparative study on contribution of bimodal microstructure and heterogeneous microstructure to mechanical properties of ZK60 alloy |
| title_fullStr | Comparative study on contribution of bimodal microstructure and heterogeneous microstructure to mechanical properties of ZK60 alloy |
| title_full_unstemmed | Comparative study on contribution of bimodal microstructure and heterogeneous microstructure to mechanical properties of ZK60 alloy |
| title_short | Comparative study on contribution of bimodal microstructure and heterogeneous microstructure to mechanical properties of ZK60 alloy |
| title_sort | comparative study on contribution of bimodal microstructure and heterogeneous microstructure to mechanical properties of zk60 alloy |
| topic | Bimodal microstructure Heterogeneous microstructure ZK60 alloy Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424027418 |
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