Kink-band formation in the directionally-solidified Mg/LPSO two-phase alloys
The variation in the mechanical properties with the volume fraction of the long-period stacking ordered (LPSO) phase in directionally solidified (DS) Mg/LPSO two-phase alloys was examined. Unexpectedly, the yield stress of the DS alloys increases non-monotonically with an increase in the volume frac...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2022-12-01
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| Series: | Science and Technology of Advanced Materials |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/14686996.2022.2137696 |
| _version_ | 1811243809233698816 |
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| author | Toko Tokunaga Koji Hagihara Michiaki Yamasaki Tsuyoshi Mayama Kazuki Yamamoto Hiroki Narimoto Taiki Kida Yoshihito Kawamura Takayoshi Nakano |
| author_facet | Toko Tokunaga Koji Hagihara Michiaki Yamasaki Tsuyoshi Mayama Kazuki Yamamoto Hiroki Narimoto Taiki Kida Yoshihito Kawamura Takayoshi Nakano |
| author_sort | Toko Tokunaga |
| collection | DOAJ |
| description | The variation in the mechanical properties with the volume fraction of the long-period stacking ordered (LPSO) phase in directionally solidified (DS) Mg/LPSO two-phase alloys was examined. Unexpectedly, the yield stress of the DS alloys increases non-monotonically with an increase in the volume fraction of the LPSO phase. The LPSO phase is considered an effective strengthening phase in Mg alloys, when the stress is applied parallel to the growth direction. Nevertheless, the highest strength was obtained in alloys with 61–86 vol.% of the LPSO phase, which was considerably higher than that in the LPSO single-phase alloy. It was clarified that this complicated variation in the yield stress was generated from the change in the formation stress of kink bands, which varied with the thickness of the LPSO-phase grains. Furthermore, the coexistence of Mg in the LPSO phase alloy induced the homogeneous formation of kink bands in the alloys, leading to the enhancement of the ‘kink-band strengthening’. The results demonstrated that microstructural control is significantly important in Mg/LPSO two-phase alloys, in which both phases exhibit strong plastic anisotropy, to realize the maximum mechanical properties. |
| first_indexed | 2024-04-12T14:13:46Z |
| format | Article |
| id | doaj.art-0077ddfdfea14664ae9874e3c82aa55d |
| institution | Directory Open Access Journal |
| issn | 1468-6996 1878-5514 |
| language | English |
| last_indexed | 2024-04-12T14:13:46Z |
| publishDate | 2022-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj.art-0077ddfdfea14664ae9874e3c82aa55d2022-12-22T03:29:47ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142022-12-0123175276610.1080/14686996.2022.2137696Kink-band formation in the directionally-solidified Mg/LPSO two-phase alloysToko Tokunaga0Koji Hagihara1Michiaki Yamasaki2Tsuyoshi Mayama3Kazuki Yamamoto4Hiroki Narimoto5Taiki Kida6Yoshihito Kawamura7Takayoshi Nakano8Department of Physical Science and Engineering, Nagoya Institute of Technology, Nagoya, Aichi, JapanDepartment of Physical Science and Engineering, Nagoya Institute of Technology, Nagoya, Aichi, JapanMagnesium Research Center & Department of Materials Science, Kumamoto University, Kumamoto, JapanMagnesium Research Center & Department of Materials Science, Kumamoto University, Kumamoto, JapanDepartment of Physical Science and Engineering, Nagoya Institute of Technology, Nagoya, Aichi, JapanDepartment of Adaptive Machine Systems, Graduate School of Engineering, Osaka University, Suita, Osaka, JapanDivision of Materials and Manufacturing Science, Graduate School of Engineering, Suita, Osaka, JapanMagnesium Research Center & Department of Materials Science, Kumamoto University, Kumamoto, JapanDivision of Materials and Manufacturing Science, Graduate School of Engineering, Suita, Osaka, JapanThe variation in the mechanical properties with the volume fraction of the long-period stacking ordered (LPSO) phase in directionally solidified (DS) Mg/LPSO two-phase alloys was examined. Unexpectedly, the yield stress of the DS alloys increases non-monotonically with an increase in the volume fraction of the LPSO phase. The LPSO phase is considered an effective strengthening phase in Mg alloys, when the stress is applied parallel to the growth direction. Nevertheless, the highest strength was obtained in alloys with 61–86 vol.% of the LPSO phase, which was considerably higher than that in the LPSO single-phase alloy. It was clarified that this complicated variation in the yield stress was generated from the change in the formation stress of kink bands, which varied with the thickness of the LPSO-phase grains. Furthermore, the coexistence of Mg in the LPSO phase alloy induced the homogeneous formation of kink bands in the alloys, leading to the enhancement of the ‘kink-band strengthening’. The results demonstrated that microstructural control is significantly important in Mg/LPSO two-phase alloys, in which both phases exhibit strong plastic anisotropy, to realize the maximum mechanical properties.https://www.tandfonline.com/doi/10.1080/14686996.2022.2137696Mg alloystrengthLPSO-phasemicrostructurekink band |
| spellingShingle | Toko Tokunaga Koji Hagihara Michiaki Yamasaki Tsuyoshi Mayama Kazuki Yamamoto Hiroki Narimoto Taiki Kida Yoshihito Kawamura Takayoshi Nakano Kink-band formation in the directionally-solidified Mg/LPSO two-phase alloys Science and Technology of Advanced Materials Mg alloy strength LPSO-phase microstructure kink band |
| title | Kink-band formation in the directionally-solidified Mg/LPSO two-phase alloys |
| title_full | Kink-band formation in the directionally-solidified Mg/LPSO two-phase alloys |
| title_fullStr | Kink-band formation in the directionally-solidified Mg/LPSO two-phase alloys |
| title_full_unstemmed | Kink-band formation in the directionally-solidified Mg/LPSO two-phase alloys |
| title_short | Kink-band formation in the directionally-solidified Mg/LPSO two-phase alloys |
| title_sort | kink band formation in the directionally solidified mg lpso two phase alloys |
| topic | Mg alloy strength LPSO-phase microstructure kink band |
| url | https://www.tandfonline.com/doi/10.1080/14686996.2022.2137696 |
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