Characterization of surface liquid segregation in SSM-HPDC aluminium alloys 7075, 2024, 6082 and A201

Möller, Heinrich; Curle, Ulyate Andries; Masuku, E.P.

doi:10.1016/s1003-6326(10)60593-6

Cited by 47 publications

(40 citation statements)

References 15 publications

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“…Curle [57] also found the porosity in 6082-T6 and 7075-T6 samples caused by incipient melting during solution heat treatment have a negative effect on the elongation, suggesting that optimizing or redesigning the solution heat treatment procedure after determining the melting points of precipitated phase may be beneficial to improve the brittleness. Recent studies on 7050 alloy [100] confirmed their statement and the author proposed that further controlling impurity contents in the alloy would be profitable to the elongation and strength as the eutectic Si and Al7Cu2Fe phases still Comparation of tensile behaviors of some wrought Al alloys and A356 alloy fabricated by conventional casting and rheoforming in the as-fabricated and heat-treated condition [56,57,69,70,73,78,79,91,95,[102][103][104][105][106][107][108][109][110].…”

Section: Tensile Behaviormentioning

confidence: 96%

Current Progress in Rheoforming of Wrought Aluminum Alloys: A Review

Gan

et al. 2020

Metals

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Semi-solid processing (SSP), including rheoforming and thixoforming, offers a promising opportunity to manufacture net-shaped parts with complex structure and excellent mechanical properties. Owing to its low cost and short process, rheoforming has been the subject of extensive study over the last two decades. The interest in the rheoforming of wrought aluminum alloys is progressively growing among both the research and industrial communities. This review starts with reviewing the recent efforts and advances on preparation of semi-solid slurry of wrought Al alloys, followed by discussing the correlation between microstructure and performance of these alloys. Finally, special attention is paid in the industrial application and the future trends of rheoforming of wrought aluminum alloys.

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Section: Tensile Behaviormentioning

confidence: 96%

Current Progress in Rheoforming of Wrought Aluminum Alloys: A Review

Gan

et al. 2020

Metals

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“…Previous research on the semi-solid formability of Mg-Al alloy claimed that the liquid could serve to relax the stress concentrations caused by the dominant deformation process and accelerate the flow of the solid [4][5][6][7] . Similar upsetting and die forging results are obtained in the present study.…”

Section: Semi-solid Formability Of the Ti-cu Alloysmentioning

confidence: 99%

“…The semi-solid deformation and processing behaviors of Al alloys [4][5][6] , Mg alloys [7][8][9] and steel [10] were investigated all over the world, and many achievements have been obtained. However, the previous researches on the deformation behavior and processing technology of titanium alloys were conducted by the solid state forming, and the main results showed that titanium and its alloys are difficult to be fabricated in solid state due to their poor formability such as high strength, relatively low elastic modulus, high chemical reactivity, and high energy cost [11] .…”

mentioning

confidence: 99%

Effect of Cu Content on the Semi-Solid Formability and Mechanical Properties of Ti-Cu Alloys

Chen

Yazhou

Yiping

et al. 2016

Rare Metal Materials and Engineering

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The formability of Ti-Cu alloys and their mechanical properties after semi-solid forging were investigated. The formability was evaluated by upsetting and die forging tests. Tensile test was also performed to study the mechanical properties of Ti-Cu alloys after semi-solid forging. The results show that the semi-solid forging requires lower upsetting forces in the temperature range from 1000 °C to 1150 °C compared with conventional solid forging. Die forging tests show that the semi-solid forged Ti-Cu alloys have an excellent workability with a forging ratio of 75% in the temperature range from 1000 °C to 1050 °C. The Ti2Cu phase increases with the increase of Cu content, and more liquid precipitates during semi-solid deformation at higher temperatures and higher Cu content, which relaxes the stress concentration caused by solid deformation and improves the formability. Tensile test reveals that semi-solid forged Ti-Cu alloys exhibit higher strength and lower ductility than conventional forged alloys. The Ti-Cu alloys have lower ductility and higher strength with the increasing of Cu content. The difference in tensile properties is attributed to the change of Ti2Cu precipitates at different Cu contents and semi-solid forging temperatures.

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“…Due to the presence of a small volume of liquid, the alloy in a semisolid state can be processed more easily with lower deformation resistance, lower energy cost, and better formability than that in a solid state (Eskin et al 2004;Chino et al 2003 On account of these advantages, the semisolid deformation behaviors of Al, Mg alloy, and steel have been carried out by many scientists and engineers all over the world, and many useful results have been obtained (Püttgen et al 2007;Iwasaki et al 1998;Möller et al 2010;Hu et al 2009). However, the semisolid deformation behavior of titanium alloys, which is widely used in many fields, has not been investigated.…”

Section: Introductionmentioning

confidence: 99%

Characterization of semisolid deformation behavior and constitutive analysis of Ti230 alloy

Chen

Luo

Wei

et al. 2015

Mech Time-Depend Mater

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The semisolid compressive deformation behavior of Ti230 titanium alloy at the temperature range of 1273 K to 1573 K and strain rate range of 0.005 to 5 s −1 has been investigated by hot compressive testing. The relationship between flow stress and deformation parameters and microstructure were discussed. The results show that the alloy expresses obvious yield point in semisolid state. The maximum decreased with decreasing solid phase fraction and/or decreasing strain rate, and a transition in stress occurred at a solid phase fraction close to 0.95, which is considered to be associated with the decrease in amount of solid bridges between grains and the decomposing effects of the liquid on α-Ti matrix. A deformation constitutive equation for Ti230 alloy in semisolid state was established considering high-temperature deformation activation energy Q. Furthermore, microstructural analysis confirmed that increasing temperature could reduce the deformation-resistant stress and lead to the transformation of softening mechanism from plastic deformation of solid particles (PDS) to sliding between the solid particles (SS).

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Characterization of surface liquid segregation in SSM-HPDC aluminium alloys 7075, 2024, 6082 and A201

Cited by 47 publications

References 15 publications

Current Progress in Rheoforming of Wrought Aluminum Alloys: A Review

Current Progress in Rheoforming of Wrought Aluminum Alloys: A Review

Effect of Cu Content on the Semi-Solid Formability and Mechanical Properties of Ti-Cu Alloys

Characterization of semisolid deformation behavior and constitutive analysis of Ti230 alloy

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