In-situ investigate on the microstructure evolution, deformation and fracture mechanism of Mg-Gd-Zn-Mn alloy with varies of LPSO volume fraction
The induction of long-period stacking ordered (LPSO) phase through heat treatment was an effective method to strengthen magnesium alloys. In this study, the volume fraction of lamellar LPSO in the Mg-4Gd-1Zn-0.5Mn alloy was controlled by optimizing the heat treatment process. The research findings s...
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| Aineistotyyppi: | Artikkeli |
| Kieli: | English |
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Elsevier
2023-09-01
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| Sarja: | Journal of Materials Research and Technology |
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| Linkit: | http://www.sciencedirect.com/science/article/pii/S2238785423023165 |
| _version_ | 1827780357086248960 |
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| author | Shiyu Luan Lei Zhang Lijia Chen Jinhui Wang Peipeng Jin |
| author_facet | Shiyu Luan Lei Zhang Lijia Chen Jinhui Wang Peipeng Jin |
| author_sort | Shiyu Luan |
| collection | DOAJ |
| description | The induction of long-period stacking ordered (LPSO) phase through heat treatment was an effective method to strengthen magnesium alloys. In this study, the volume fraction of lamellar LPSO in the Mg-4Gd-1Zn-0.5Mn alloy was controlled by optimizing the heat treatment process. The research findings showed that with increasing heat treatment time, the volume fraction of LPSO initially increased then decreased until disappearing. The alloy treated at 500 °C for 2 h exhibited the highest volume fraction of lamellar LPSO, increasing from 1.64% to 13.68%. Further in-situ tensile tests were conducted on two types of alloys contain higher LPSO fraction (HL) and lower LPSO fraction (LL) at ambient temperature. The increased critical shear stress (CRSS) and obstacle effects on dislocations caused by LPSO effectively enhanced the strength of the alloy. The dominant deformation mechanisms of both HL and LL alloys are basal slip and twinning during tensile deformation. However, the HL alloy activated more non-basal slip significantly, which was ascribed to the activation of non-basal slip by LPSO kinking during deformation. Additionally, the bending and kinking of LPSO effectively restricted crack initiation and propagation, thereby enhancing the plasticity. The HL alloy exhibited fewer twin boundaries after deformation, which was attributed to the hindrance of twinning extension by LPSO. |
| first_indexed | 2024-03-11T15:04:25Z |
| format | Article |
| id | doaj.art-0f516e8ccb9843dcbc98ee3299a79e96 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:04:25Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-0f516e8ccb9843dcbc98ee3299a79e962023-10-30T06:04:54ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012690099023In-situ investigate on the microstructure evolution, deformation and fracture mechanism of Mg-Gd-Zn-Mn alloy with varies of LPSO volume fractionShiyu Luan0Lei Zhang1Lijia Chen2Jinhui Wang3Peipeng Jin4School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, People's Republic of ChinaSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, People's Republic of China; Qinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining, 810016, People's Republic of ChinaSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, People's Republic of 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, People's Republic of China; Corresponding author.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, People's Republic of China; Qinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining, 810016, People's Republic of China; Corresponding author. Qinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining, 810016, People's Republic of China.The induction of long-period stacking ordered (LPSO) phase through heat treatment was an effective method to strengthen magnesium alloys. In this study, the volume fraction of lamellar LPSO in the Mg-4Gd-1Zn-0.5Mn alloy was controlled by optimizing the heat treatment process. The research findings showed that with increasing heat treatment time, the volume fraction of LPSO initially increased then decreased until disappearing. The alloy treated at 500 °C for 2 h exhibited the highest volume fraction of lamellar LPSO, increasing from 1.64% to 13.68%. Further in-situ tensile tests were conducted on two types of alloys contain higher LPSO fraction (HL) and lower LPSO fraction (LL) at ambient temperature. The increased critical shear stress (CRSS) and obstacle effects on dislocations caused by LPSO effectively enhanced the strength of the alloy. The dominant deformation mechanisms of both HL and LL alloys are basal slip and twinning during tensile deformation. However, the HL alloy activated more non-basal slip significantly, which was ascribed to the activation of non-basal slip by LPSO kinking during deformation. Additionally, the bending and kinking of LPSO effectively restricted crack initiation and propagation, thereby enhancing the plasticity. The HL alloy exhibited fewer twin boundaries after deformation, which was attributed to the hindrance of twinning extension by LPSO.http://www.sciencedirect.com/science/article/pii/S2238785423023165Mg-RE alloyHeat treatmentLPSOTwinningKBs |
| spellingShingle | Shiyu Luan Lei Zhang Lijia Chen Jinhui Wang Peipeng Jin In-situ investigate on the microstructure evolution, deformation and fracture mechanism of Mg-Gd-Zn-Mn alloy with varies of LPSO volume fraction Journal of Materials Research and Technology Mg-RE alloy Heat treatment LPSO Twinning KBs |
| title | In-situ investigate on the microstructure evolution, deformation and fracture mechanism of Mg-Gd-Zn-Mn alloy with varies of LPSO volume fraction |
| title_full | In-situ investigate on the microstructure evolution, deformation and fracture mechanism of Mg-Gd-Zn-Mn alloy with varies of LPSO volume fraction |
| title_fullStr | In-situ investigate on the microstructure evolution, deformation and fracture mechanism of Mg-Gd-Zn-Mn alloy with varies of LPSO volume fraction |
| title_full_unstemmed | In-situ investigate on the microstructure evolution, deformation and fracture mechanism of Mg-Gd-Zn-Mn alloy with varies of LPSO volume fraction |
| title_short | In-situ investigate on the microstructure evolution, deformation and fracture mechanism of Mg-Gd-Zn-Mn alloy with varies of LPSO volume fraction |
| title_sort | in situ investigate on the microstructure evolution deformation and fracture mechanism of mg gd zn mn alloy with varies of lpso volume fraction |
| topic | Mg-RE alloy Heat treatment LPSO Twinning KBs |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423023165 |
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