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Comparative study of microstructural evolution and mechanical behavior in automotive control arms processed from continuously cast ingots and extruded rods.

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Title: Comparative study of microstructural evolution and mechanical behavior in automotive control arms processed from continuously cast ingots and extruded rods.
Authors: Jia, Tizhuo1 (AUTHOR), Liu, Zhimin1 (AUTHOR), Xu, Zhen1 (AUTHOR) ustlxuzhen@126.com, Tian, Shuangyong1 (AUTHOR), Sun, Yuchong1 (AUTHOR), Zhao, Zhihao2 (AUTHOR), Wang, Yu3 (AUTHOR)
Source: Metallurgical Research & Technology. 2025, Vol. 122 Issue 6, p1-9. 9p.
Subjects: Aluminum alloys, Microstructure, Automobile parts, Aluminum ingots, Metal products, Automobile industry, Mechanical behavior of materials, Metal crystal growth
Abstract: 6082 aluminum alloy forging is widely used in automotive Industry to produce control arms, with extruded rods currently serving as the primary feedstock material. However, this approach often leads to abnormal grain growth during heat treatment, resulting in degraded mechanical properties. Alternatively, using continuously cast ingots of equivalent diameter as feedstock not only mitigates grain growth but also reduces production costs. This study systematically compares the microstructure and mechanical properties of control arms fabricated from continuously cast ingots and extruded rods using optical microscopy (OM), scanning electron microscopy (SEM), hardness testing, and tensile testing. The findings reveal that control arms produced from continuously cast ingots exhibit a finer average grain size and a higher volume fraction of uniformly dispersed secondary phases compared to those fabricated from extruded rods. The tensile strength, yield strength, elongation, and microhardness of the components produced from continuously cast ingot reached 350 MPa, 300 MPa, 16.5%, and 122.7 HV0.1, respectively. These values represent a 7.7% increase in tensile strength, a substantial 20% enhancement in yield strength, and a 3% improvement in microhardness over the components made from extruded rods, while maintaining excellent ductility. [ABSTRACT FROM AUTHOR]
Copyright of Metallurgical Research & Technology is the property of EDP Sciences 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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DbLabel: Engineering Source
An: 190822216
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  Data: Comparative study of microstructural evolution and mechanical behavior in automotive control arms processed from continuously cast ingots and extruded rods.
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  Data: <searchLink fieldCode="AR" term="%22Jia%2C+Tizhuo%22">Jia, Tizhuo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Zhimin%22">Liu, Zhimin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Zhen%22">Xu, Zhen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ustlxuzhen@126.com</i><br /><searchLink fieldCode="AR" term="%22Tian%2C+Shuangyong%22">Tian, Shuangyong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Yuchong%22">Sun, Yuchong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Zhihao%22">Zhao, Zhihao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Yu%22">Wang, Yu</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Metallurgical+Research+%26+Technology%22">Metallurgical Research & Technology</searchLink>. 2025, Vol. 122 Issue 6, p1-9. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Aluminum+alloys%22">Aluminum alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Automobile+parts%22">Automobile parts</searchLink><br /><searchLink fieldCode="DE" term="%22Aluminum+ingots%22">Aluminum ingots</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+products%22">Metal products</searchLink><br /><searchLink fieldCode="DE" term="%22Automobile+industry%22">Automobile industry</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+crystal+growth%22">Metal crystal growth</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: 6082 aluminum alloy forging is widely used in automotive Industry to produce control arms, with extruded rods currently serving as the primary feedstock material. However, this approach often leads to abnormal grain growth during heat treatment, resulting in degraded mechanical properties. Alternatively, using continuously cast ingots of equivalent diameter as feedstock not only mitigates grain growth but also reduces production costs. This study systematically compares the microstructure and mechanical properties of control arms fabricated from continuously cast ingots and extruded rods using optical microscopy (OM), scanning electron microscopy (SEM), hardness testing, and tensile testing. The findings reveal that control arms produced from continuously cast ingots exhibit a finer average grain size and a higher volume fraction of uniformly dispersed secondary phases compared to those fabricated from extruded rods. The tensile strength, yield strength, elongation, and microhardness of the components produced from continuously cast ingot reached 350 MPa, 300 MPa, 16.5%, and 122.7 HV0.1, respectively. These values represent a 7.7% increase in tensile strength, a substantial 20% enhancement in yield strength, and a 3% improvement in microhardness over the components made from extruded rods, while maintaining excellent ductility. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Metallurgical Research & Technology is the property of EDP Sciences 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: 10.1051/metal/2025089
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      – Code: eng
        Text: English
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        PageCount: 9
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      – SubjectFull: Aluminum alloys
        Type: general
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Automobile parts
        Type: general
      – SubjectFull: Aluminum ingots
        Type: general
      – SubjectFull: Metal products
        Type: general
      – SubjectFull: Automobile industry
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Metal crystal growth
        Type: general
    Titles:
      – TitleFull: Comparative study of microstructural evolution and mechanical behavior in automotive control arms processed from continuously cast ingots and extruded rods.
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            NameFull: Jia, Tizhuo
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            NameFull: Liu, Zhimin
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            NameFull: Xu, Zhen
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            NameFull: Tian, Shuangyong
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            – D: 01
              M: 11
              Text: 2025
              Type: published
              Y: 2025
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              Value: 122
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