Improvement in tensile strength of extruded Mg–5Bi alloy through addition of Sn and its underlying strengthening mechanisms

Jin, Sang-Cheol; Won, Jae; Lee, Jeong Hun; Lee, Taekyung; Han, Sungjun; Park, Sung Hyuk

doi:10.1016/j.jma.2021.05.009

Cited by 15 publications

(5 citation statements)

References 43 publications

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“…By adjusting the contact distance and angle between the working belt of the die and the upper and lower surfaces of the sheet, a non-symmetric shear strain gradient along the thickness direction of the sheet (parallel to the thickness plane of the sheet) can be formed. Shear deformation along the direction parallel to the sheet's thickness will induce grain orientation with localized strain, which can significantly improve the basal texture of Mg alloy thin sheets [49,68]. Thus, the c-axis orientation of the sheet grains tilts along the direction of extrusion, weakening the basal texture of the sheet and thus improving the overall mechanical performance of the extruded sheet.…”

Section: Normal-direction Asymmetric Extrusion Technology Of Mg Alloymentioning

confidence: 99%

“…Conventional extrusion (CE) processes involve symmetrical extrusion forces, leading to a strong basal texture and isotropy of the Mg alloy sheet. However, a new type of asymmetric extrusion for Mg alloy sheets involves constructing asymmetrical internal geometries within the extrusion die to maintain asymmetrical stress and strain during extrusion [49][50][51]. This can increase additional shear strain, refine grain size, overcome the dead zone phenomenon, and improve the smoothness of metal flow and flow properties of the metal extrusion process.…”

Section: Introductionmentioning

confidence: 99%

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Asymmetric Extrusion Technology of Mg Alloy: A Review

et al. 2023

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Magnesium (Mg) alloy is a widely used lightweight metal structural material due to its high specific strength and stiffness, excellent damping performance, and recyclability. Wrought Mg alloys are particularly favored in fields such as aerospace, transportation, and biomedical stents. However, most wrought Mg alloys with a hexagonal close-packed (HCP) crystal structure lack sufficient independent slip systems to meet the von Mises criterion for uniform plastic deformation at room temperature. This can result in the formation of a strong basal texture during plastic deformation and poor room temperature plastic formability. Enhancing the room temperature forming performance is therefore a crucial challenge that needs to be addressed in order to expand the application of Mg alloy sheets. Our research group has comprehensively summarized significant work and the latest research progress in improving the room temperature forming of Mg alloy sheets via extrusion technology in recent years. Specifically, we have developed a new type of asymmetric extrusion technology that combines material structure evolution, mechanical properties, and forming behavior analysis. We have elucidated the extrusion process characteristics, texture control mechanism, and forming properties of Mg alloy sheets through plastic deformation mechanisms, mold design, and finite element numerical simulation. The findings of our study present an innovative extrusion technology for the fabrication of highly formable Mg alloy sheets, which can be utilized in various applications.

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Section: Normal-direction Asymmetric Extrusion Technology Of Mg Alloymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Asymmetric Extrusion Technology of Mg Alloy: A Review

et al. 2023

View full text Add to dashboard Cite

show abstract

“…By adjusting the contact distance and angle between the working belt of the die and the upper and lower surfaces of the sheet, a non-symmetric shear strain gradient along the thickness direction of the sheet (parallel to the thickness plane of the sheet) can be formed. Shear deformation along the direction parallel to the sheet's thickness will induce grain orientation with localized strain, which can significantly improve the basal texture of Mg alloy thin sheets [49,68]. Thus, the c-axis orientation of the sheet grains tilts along the direction of extrusion, weaken the basal texture of the sheet, and thus improve the overall mechanical performance of the extruded sheet.…”

Section: Normal Direction Asymmetric Extrusion Technology Of Mg Alloymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Asymmetric Extrusion Technology of Mg Alloy: A Review

Yang¹,

Zhang²,

Peng³

et al. 2023

Preprint

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Magnesium (Mg) alloy is a widely used lightweight metal structural material due to its high specific strength and stiffness, excellent damping performance, and recyclability. Wrought Mg alloys are widely favored in fields such as aerospace, transportation, and biomedical stents. However, most wrought Mg alloys with a hexagonal close-packed (HCP) crystal structure lack sufficient independent slip systems to meet the von Mises criterion for uniform plastic deformation at room temperature. This can result in the formation of strong basal texture during plastic deformation and poor room temperature plastic forming ability. Improving the room temperature forming performance is a crucial challenge that must be addressed to broaden the application of Mg alloy sheets. Our research group has comprehensively summarized significant work and latest research progress in improving the room temperature forming of Mg alloy sheets via extrusion technology in recent years. Specifically, we have developed a new type of asymmetric extrusion technology that combines material structure evolution, mechanical property, and forming behavior analysis. We have elucidated the extrusion process characteristics, texture control mechanism, and forming properties of Mg alloy sheets through plastic deformation mechanisms, mold design, and finite element numerical simulation. Our findings provide a novel extrusion technology for the fabrication of highly formable Mg alloy sheets, which can be utilized in various applications.

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“…The possible reason is that when extra Sn particles were added, Sn particles started to dissolve into the solder matrix forming equiaxed-shaped Sn particles as shown in Fig 4 (b). Sn particle which has higher hardness [46], higher tensile strength [47] and higher ductility [42] than Bi, which bridge the crack propagation causing more energy is required to further propagate the crack, hence ductility will be increased.…”

Section: Tensile Test Analysismentioning

confidence: 99%

Effects of tin particles addition on structural and mechanical properties of eutectic Sn–58Bi solder joint

Bashir

Saad

Rizwan

et al. 2022

J Mater Sci: Mater Electron

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Due to the inherent environmental and health toxicities associated with lead, the use of environmental friendly lead-free solder materials has become an unavoidable trend in the electronic packaging industry. Sn-58Bi alloy is gaining attention for its good material properties such as low melting point, reliability and high tensile strength. The presence of the bismuth-rich phase increases the brittleness of Sn-58Bi alloy. The purpose of this study is to suppress the brittleness of Sn-58Bi alloy by the addition of different wt% (0, 10, 20, 30) of Sn powder. The powder metallurgy method was used to prepare the samples. Scanning electron microscopy and energy dispersive X-ray analysis were done to study the structural properties and a tensile test was done by a universal tensile machine to study the mechanical properties. The results reveal that the Sn particles partially dissolved in the Sn-58Bi solder matrix. The dissolution of Sn particles significantly improved the mechanical strength by 30%, suppressed the brittleness and improved the strain value by 1.3 times.

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Improvement in tensile strength of extruded Mg–5Bi alloy through addition of Sn and its underlying strengthening mechanisms

Cited by 15 publications

References 43 publications

Asymmetric Extrusion Technology of Mg Alloy: A Review

Asymmetric Extrusion Technology of Mg Alloy: A Review

Asymmetric Extrusion Technology of Mg Alloy: A Review

Effects of tin particles addition on structural and mechanical properties of eutectic Sn–58Bi solder joint

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