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Melting point decrease induced by synergistic effect of proton implantation and radiation defects in aluminum.

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Title: Melting point decrease induced by synergistic effect of proton implantation and radiation defects in aluminum.
Authors: Yang, Linlong1 (AUTHOR), Yu, Miaosen1 (AUTHOR), Setyawan, Wahyu2 (AUTHOR), Dong, Yibin1 (AUTHOR), Ma, Wenxue1 (AUTHOR), Jia, Huan3 (AUTHOR), He, Yuan3 (AUTHOR), Cai, Hanjie3 (AUTHOR), Zhang, Xunchao3 (AUTHOR), Wang, Xuelin1 (AUTHOR), Gao, Ning1,3 (AUTHOR) ning.gao@sdu.edu.cn
Source: Journal of Materials Science. Sep2024, Vol. 59 Issue 34, p16309-16323. 15p.
Subjects: Melting points, Dislocation loops, Energy levels (Quantum mechanics), Atomic displacements, Elastic constants
Abstract: A coupled effect of high-energy proton implantation and radiation defects on the melting point of aluminum (Al) is investigated using molecular dynamics (MD) method. The results reveal that interstitial hydrogen impurities can induce lower melting point than hydrides. Calculation of three independent elastic constants C11, C12, and C44 of Al before and after proton implantations indicates that interstitial hydrogen impurities could induce lower (C11-C12)/2 and C44 than that of hydrides, resulting in a stronger instability and a lower melting point. Formation of radiation defect-hydrogen complexes could also induce a lower melting point than cases without the presence of hydrogen atoms. The lowest melting point is ~ 87% of the melting point of pure Al, which is observed in a dislocation loop-hydrogen complex system with a hydrogen concentration around 1% and radius of a dislocation loop around 15 Å. Microstructure evolution indicates the absorption of hydrogen atoms by defects could change the potential energy and the stress state of defects, resulting in larger atomic displacements of Al atoms around dislocation/loop-hydrogen and vacancy-hydrogen clusters, lowering the melting point. However, an opposite effect is observed when a void interacts with hydrogen atoms, in which the atomic displacements of Al atoms are limited, resulting in a higher melting point than that induced only by a void. All these results suggest that when an Al alloy is used as a beam dump in a proton accelerator, the proton energy and current should be controlled appropriately to avoid the melt of the alloy. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Materials Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Melting point decrease induced by synergistic effect of proton implantation and radiation defects in aluminum.
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  Data: <searchLink fieldCode="AR" term="%22Yang%2C+Linlong%22">Yang, Linlong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yu%2C+Miaosen%22">Yu, Miaosen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Setyawan%2C+Wahyu%22">Setyawan, Wahyu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dong%2C+Yibin%22">Dong, Yibin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Wenxue%22">Ma, Wenxue</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jia%2C+Huan%22">Jia, Huan</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22He%2C+Yuan%22">He, Yuan</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cai%2C+Hanjie%22">Cai, Hanjie</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Xunchao%22">Zhang, Xunchao</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Xuelin%22">Wang, Xuelin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gao%2C+Ning%22">Gao, Ning</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> ning.gao@sdu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+Science%22">Journal of Materials Science</searchLink>. Sep2024, Vol. 59 Issue 34, p16309-16323. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Melting+points%22">Melting points</searchLink><br /><searchLink fieldCode="DE" term="%22Dislocation+loops%22">Dislocation loops</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+levels+%28Quantum+mechanics%29%22">Energy levels (Quantum mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Atomic+displacements%22">Atomic displacements</searchLink><br /><searchLink fieldCode="DE" term="%22Elastic+constants%22">Elastic constants</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A coupled effect of high-energy proton implantation and radiation defects on the melting point of aluminum (Al) is investigated using molecular dynamics (MD) method. The results reveal that interstitial hydrogen impurities can induce lower melting point than hydrides. Calculation of three independent elastic constants C11, C12, and C44 of Al before and after proton implantations indicates that interstitial hydrogen impurities could induce lower (C11-C12)/2 and C44 than that of hydrides, resulting in a stronger instability and a lower melting point. Formation of radiation defect-hydrogen complexes could also induce a lower melting point than cases without the presence of hydrogen atoms. The lowest melting point is ~ 87% of the melting point of pure Al, which is observed in a dislocation loop-hydrogen complex system with a hydrogen concentration around 1% and radius of a dislocation loop around 15 Å. Microstructure evolution indicates the absorption of hydrogen atoms by defects could change the potential energy and the stress state of defects, resulting in larger atomic displacements of Al atoms around dislocation/loop-hydrogen and vacancy-hydrogen clusters, lowering the melting point. However, an opposite effect is observed when a void interacts with hydrogen atoms, in which the atomic displacements of Al atoms are limited, resulting in a higher melting point than that induced only by a void. All these results suggest that when an Al alloy is used as a beam dump in a proton accelerator, the proton energy and current should be controlled appropriately to avoid the melt of the alloy. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Materials Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1007/s10853-024-10147-z
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 16309
    Subjects:
      – SubjectFull: Melting points
        Type: general
      – SubjectFull: Dislocation loops
        Type: general
      – SubjectFull: Energy levels (Quantum mechanics)
        Type: general
      – SubjectFull: Atomic displacements
        Type: general
      – SubjectFull: Elastic constants
        Type: general
    Titles:
      – TitleFull: Melting point decrease induced by synergistic effect of proton implantation and radiation defects in aluminum.
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            NameFull: Yang, Linlong
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            – D: 08
              M: 09
              Text: Sep2024
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              Y: 2024
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