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Thermal-magnetic stress relief induced evolution of residual stress and mechanical properties in selectively laser melted AlSi10Mg alloy.

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Title: Thermal-magnetic stress relief induced evolution of residual stress and mechanical properties in selectively laser melted AlSi10Mg alloy.
Authors: Gao, Zhiying1 (AUTHOR), Song, Hechuan1,2 (AUTHOR), Zhang, Boyang1,2 (AUTHOR), Zhang, Qingdong1,2 (AUTHOR) zhang_qd@me.ustb.edu.cn
Source: Materials Science & Engineering: A. May2026, Vol. 959, pN.PAG-N.PAG. 1p.
Subjects: Residual stresses, Aluminum-magnesium-silicon alloys, Precipitation hardening, Microstructure, Dislocations in crystals, Mechanical behavior of materials, Selective laser melting
Abstract: The selective laser melting (SLM) process induces substantial residual stresses in AlSi10Mg alloys, which significantly compromise dimensional stability and service performance. To achieve efficient and low-energy residual stress relief without degrading mechanical properties, a novel thermal–magnetic stress relief (TMSR) treatment was proposed in this study. However, limited research has explored its effects and control mechanisms in paramagnetic materials. Here, the influences of thermal stress relief (TSR), magnetic stress relief (MSR), and TMSR on the residual stress, mechanical properties, and microstructure of SLM-fabricated AlSi10Mg samples were systematically investigated. A residual stress evolution model was established to elucidate the mechanism by which TMSR regulates stress relaxation. The results indicate that TMSR preserves the eutectic Si network while promoting nano-Si precipitation and dislocation multiplication. The average residual stress was reduced by 50.9%, accompanied by improved stress uniformity, owing to the synergistic effects of high-temperature–induced dislocation thermal activation, reduced dislocation nucleation energy and motion resistance from the magnetoplastic effect, and nanoscale Si precipitation. Furthermore, a strength model was developed, which quantitatively revealed that the enhancements in yield strength, ultimate tensile strength, and elongation along the building direction mainly originated from precipitation strengthening and dislocation strengthening. This study provides fundamental insights into stress relaxation, mechanical property enhancement, dislocation evolution, and precipitation behavior in paramagnetic materials under thermal-magnetic coupling effects. [ABSTRACT FROM AUTHOR]
Copyright of Materials Science & Engineering: A is the property of Elsevier B.V. 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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 192588762
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Thermal-magnetic stress relief induced evolution of residual stress and mechanical properties in selectively laser melted AlSi10Mg alloy.
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  Data: <searchLink fieldCode="AR" term="%22Gao%2C+Zhiying%22">Gao, Zhiying</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Hechuan%22">Song, Hechuan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Boyang%22">Zhang, Boyang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Qingdong%22">Zhang, Qingdong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> zhang_qd@me.ustb.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+Science+%26+Engineering%3A+A%22">Materials Science & Engineering: A</searchLink>. May2026, Vol. 959, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Residual+stresses%22">Residual stresses</searchLink><br /><searchLink fieldCode="DE" term="%22Aluminum-magnesium-silicon+alloys%22">Aluminum-magnesium-silicon alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Precipitation+hardening%22">Precipitation hardening</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Dislocations+in+crystals%22">Dislocations in crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Selective+laser+melting%22">Selective laser melting</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The selective laser melting (SLM) process induces substantial residual stresses in AlSi10Mg alloys, which significantly compromise dimensional stability and service performance. To achieve efficient and low-energy residual stress relief without degrading mechanical properties, a novel thermal–magnetic stress relief (TMSR) treatment was proposed in this study. However, limited research has explored its effects and control mechanisms in paramagnetic materials. Here, the influences of thermal stress relief (TSR), magnetic stress relief (MSR), and TMSR on the residual stress, mechanical properties, and microstructure of SLM-fabricated AlSi10Mg samples were systematically investigated. A residual stress evolution model was established to elucidate the mechanism by which TMSR regulates stress relaxation. The results indicate that TMSR preserves the eutectic Si network while promoting nano-Si precipitation and dislocation multiplication. The average residual stress was reduced by 50.9%, accompanied by improved stress uniformity, owing to the synergistic effects of high-temperature–induced dislocation thermal activation, reduced dislocation nucleation energy and motion resistance from the magnetoplastic effect, and nanoscale Si precipitation. Furthermore, a strength model was developed, which quantitatively revealed that the enhancements in yield strength, ultimate tensile strength, and elongation along the building direction mainly originated from precipitation strengthening and dislocation strengthening. This study provides fundamental insights into stress relaxation, mechanical property enhancement, dislocation evolution, and precipitation behavior in paramagnetic materials under thermal-magnetic coupling effects. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Science & Engineering: A is the property of Elsevier B.V. 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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    Identifiers:
      – Type: doi
        Value: 10.1016/j.msea.2026.149993
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      – Code: eng
        Text: English
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        StartPage: N.PAG
    Subjects:
      – SubjectFull: Residual stresses
        Type: general
      – SubjectFull: Aluminum-magnesium-silicon alloys
        Type: general
      – SubjectFull: Precipitation hardening
        Type: general
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Dislocations in crystals
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Selective laser melting
        Type: general
    Titles:
      – TitleFull: Thermal-magnetic stress relief induced evolution of residual stress and mechanical properties in selectively laser melted AlSi10Mg alloy.
        Type: main
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            NameFull: Gao, Zhiying
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            NameFull: Song, Hechuan
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            NameFull: Zhang, Boyang
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            NameFull: Zhang, Qingdong
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 959
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            – TitleFull: Materials Science & Engineering: A
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