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Stress corrosion cracking resistance of rare earth Gd and ZnO reinforced Mg–Zn nanocomposites developed by novel sonication technique.

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Title: Stress corrosion cracking resistance of rare earth Gd and ZnO reinforced Mg–Zn nanocomposites developed by novel sonication technique.
Authors: Mahalingam, Mariyappan1 (AUTHOR), Lakshmanan, Poovazhagan2 (AUTHOR) poovazhaganl@ssn.edu.in, Lakshminarayanan, A. K.2,3 (AUTHOR), Krishnan, Parthiban4 (AUTHOR)
Source: International Journal of Metalcasting. Jan2026, Vol. 20 Issue 1, p576-591. 16p.
Subjects: Stress corrosion cracking, Corrosion resistance, Gadolinium, Microstructure, Zinc oxide, Magnesium alloys, Nanocomposite materials, Sonication
Abstract: This research systematically examines the effect of stress corrosion cracking (SCC) on the microstructure modifications of magnesium zinc (Mg–Zn) alloy and Mg–Zn–0.2 Gd–2wt. % ZnO nanocomposites. The examination was conducted in a 3.5% NaCl solution. The performance of Mg–Zn alloy and nanocomposite samples in the SCC environment was assessed using constant load at five distinct stress levels. In Mg–Zn alloy, SCC resistance is determined by a threshold stress value of 27 MPa. However, in Mg–Zn–0.2Gd–2wt. % ZnO nanocomposites, it is 58 MPa. The findings showed that Mg–Zn alloy was more susceptible to SCC than nanocomposites. Adding 0.2Gd and 2% ZnO nanoparticles to Mg–Zn alloy improved the resistance to SCC by refining the grain structure and homogenizing the microstructure. Additionally, the presence of ZnO nanoparticles acted as a barrier during the initial stages of corrosion, further enhancing the resistance to SCC in the nanocomposite sample compared to the pure Mg–Zn alloy. The SEM corrosion analysis reveals that the generated samples exhibit corrosion pits at 20 % YS, a cleavage for Mg–Zn alloy and dimples for nanocomposite were noted between 40 and 60 % YS, and complete stress failure shows completely cleavages facets for Mg–Zn alloy and more dimples for nanocomposites at 80–100 % YS. In response to the weight loss estimate, the corrosion rate of the nanocomposites is improved by 54.5%. Moreover, the stress corrosion map for nanocomposites demonstrates different zones of SCC. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Metalcasting 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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  Label: Title
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  Data: Stress corrosion cracking resistance of rare earth Gd and ZnO reinforced Mg–Zn nanocomposites developed by novel sonication technique.
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  Data: <searchLink fieldCode="AR" term="%22Mahalingam%2C+Mariyappan%22">Mahalingam, Mariyappan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lakshmanan%2C+Poovazhagan%22">Lakshmanan, Poovazhagan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> poovazhaganl@ssn.edu.in</i><br /><searchLink fieldCode="AR" term="%22Lakshminarayanan%2C+A%2E+K%2E%22">Lakshminarayanan, A. K.</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Krishnan%2C+Parthiban%22">Krishnan, Parthiban</searchLink><relatesTo>4</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Metalcasting%22">International Journal of Metalcasting</searchLink>. Jan2026, Vol. 20 Issue 1, p576-591. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Stress+corrosion+cracking%22">Stress corrosion cracking</searchLink><br /><searchLink fieldCode="DE" term="%22Corrosion+resistance%22">Corrosion resistance</searchLink><br /><searchLink fieldCode="DE" term="%22Gadolinium%22">Gadolinium</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Zinc+oxide%22">Zinc oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Magnesium+alloys%22">Magnesium alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Sonication%22">Sonication</searchLink>
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  Label: Abstract
  Group: Ab
  Data: This research systematically examines the effect of stress corrosion cracking (SCC) on the microstructure modifications of magnesium zinc (Mg–Zn) alloy and Mg–Zn–0.2 Gd–2wt. % ZnO nanocomposites. The examination was conducted in a 3.5% NaCl solution. The performance of Mg–Zn alloy and nanocomposite samples in the SCC environment was assessed using constant load at five distinct stress levels. In Mg–Zn alloy, SCC resistance is determined by a threshold stress value of 27 MPa. However, in Mg–Zn–0.2Gd–2wt. % ZnO nanocomposites, it is 58 MPa. The findings showed that Mg–Zn alloy was more susceptible to SCC than nanocomposites. Adding 0.2Gd and 2% ZnO nanoparticles to Mg–Zn alloy improved the resistance to SCC by refining the grain structure and homogenizing the microstructure. Additionally, the presence of ZnO nanoparticles acted as a barrier during the initial stages of corrosion, further enhancing the resistance to SCC in the nanocomposite sample compared to the pure Mg–Zn alloy. The SEM corrosion analysis reveals that the generated samples exhibit corrosion pits at 20 % YS, a cleavage for Mg–Zn alloy and dimples for nanocomposite were noted between 40 and 60 % YS, and complete stress failure shows completely cleavages facets for Mg–Zn alloy and more dimples for nanocomposites at 80–100 % YS. In response to the weight loss estimate, the corrosion rate of the nanocomposites is improved by 54.5%. Moreover, the stress corrosion map for nanocomposites demonstrates different zones of SCC. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of International Journal of Metalcasting 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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RecordInfo BibRecord:
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        Value: 10.1007/s40962-025-01639-y
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 576
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      – SubjectFull: Stress corrosion cracking
        Type: general
      – SubjectFull: Corrosion resistance
        Type: general
      – SubjectFull: Gadolinium
        Type: general
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Zinc oxide
        Type: general
      – SubjectFull: Magnesium alloys
        Type: general
      – SubjectFull: Nanocomposite materials
        Type: general
      – SubjectFull: Sonication
        Type: general
    Titles:
      – TitleFull: Stress corrosion cracking resistance of rare earth Gd and ZnO reinforced Mg–Zn nanocomposites developed by novel sonication technique.
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            NameFull: Mahalingam, Mariyappan
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            NameFull: Lakshmanan, Poovazhagan
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            NameFull: Lakshminarayanan, A. K.
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              M: 01
              Text: Jan2026
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              Y: 2026
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