Plasticity through De-Twinning in Twinned BCC Nanowires
The deformation behaviour of twinned FCC nanowires has been extensively investigated in recent years. However, the same is not true for their BCC counterparts. Very few studies exist concerning the deformation behaviour of twinned BCC nanowires. In view of this, molecular dynamics (MD) simulations h...
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MDPI AG
2020-05-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/10/5/366 |
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| author | G. Sainath Sunil Goyal A. Nagesha |
| author_facet | G. Sainath Sunil Goyal A. Nagesha |
| author_sort | G. Sainath |
| collection | DOAJ |
| description | The deformation behaviour of twinned FCC nanowires has been extensively investigated in recent years. However, the same is not true for their BCC counterparts. Very few studies exist concerning the deformation behaviour of twinned BCC nanowires. In view of this, molecular dynamics (MD) simulations have been performed to understand the deformation mechanisms in twinned BCC Fe nanowires. The twin boundaries (TBs) were oriented parallel to the loading direction [110] and the number of TBs is varied from one to three. MD simulation results indicate that deformation under the compressive loading of twinned BCC Fe nanowires is dominated by a unique de-twinning mechanism involving the migration of a special twin–twin junction. This de-twinning mechanism results in the complete annihilation of pre-existing TBs along with reorientation of the nanowire. Further, it has been observed that the annihilation of pre-existing TBs has occurred through two different mechanisms, one without any resolved shear stress and other with finite and small resolved shear stress. The present study enhances our understanding of de-twinning in BCC nanowires. |
| first_indexed | 2024-03-10T20:05:38Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T20:05:38Z |
| publishDate | 2020-05-01 |
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| series | Crystals |
| spelling | doaj.art-90845206bf3e4f77b5b6fbeebe90f8e32023-11-19T23:18:19ZengMDPI AGCrystals2073-43522020-05-0110536610.3390/cryst10050366Plasticity through De-Twinning in Twinned BCC NanowiresG. Sainath0Sunil Goyal1A. Nagesha2Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu 603102, IndiaMaterials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu 603102, IndiaMaterials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu 603102, IndiaThe deformation behaviour of twinned FCC nanowires has been extensively investigated in recent years. However, the same is not true for their BCC counterparts. Very few studies exist concerning the deformation behaviour of twinned BCC nanowires. In view of this, molecular dynamics (MD) simulations have been performed to understand the deformation mechanisms in twinned BCC Fe nanowires. The twin boundaries (TBs) were oriented parallel to the loading direction [110] and the number of TBs is varied from one to three. MD simulation results indicate that deformation under the compressive loading of twinned BCC Fe nanowires is dominated by a unique de-twinning mechanism involving the migration of a special twin–twin junction. This de-twinning mechanism results in the complete annihilation of pre-existing TBs along with reorientation of the nanowire. Further, it has been observed that the annihilation of pre-existing TBs has occurred through two different mechanisms, one without any resolved shear stress and other with finite and small resolved shear stress. The present study enhances our understanding of de-twinning in BCC nanowires.https://www.mdpi.com/2073-4352/10/5/366molecular dynamics simulationsBCC Fe nanowirestwin boundariesde-twinning |
| spellingShingle | G. Sainath Sunil Goyal A. Nagesha Plasticity through De-Twinning in Twinned BCC Nanowires Crystals molecular dynamics simulations BCC Fe nanowires twin boundaries de-twinning |
| title | Plasticity through De-Twinning in Twinned BCC Nanowires |
| title_full | Plasticity through De-Twinning in Twinned BCC Nanowires |
| title_fullStr | Plasticity through De-Twinning in Twinned BCC Nanowires |
| title_full_unstemmed | Plasticity through De-Twinning in Twinned BCC Nanowires |
| title_short | Plasticity through De-Twinning in Twinned BCC Nanowires |
| title_sort | plasticity through de twinning in twinned bcc nanowires |
| topic | molecular dynamics simulations BCC Fe nanowires twin boundaries de-twinning |
| url | https://www.mdpi.com/2073-4352/10/5/366 |
| work_keys_str_mv | AT gsainath plasticitythroughdetwinningintwinnedbccnanowires AT sunilgoyal plasticitythroughdetwinningintwinnedbccnanowires AT anagesha plasticitythroughdetwinningintwinnedbccnanowires |