Effect of heating rate on mechanical property, microstructure and texture evolution of Al–Mg–Si–Cu alloy during solution treatment

Guo

et al. 2015

Metall Mater Trans B

Self Cite

A model combining classical diffusion-controlled dissolution equation for a single spherical particle and Johnson-Mehl-Avrami-like equation is used to deal with dissolution process for different kinds of precipitations (Si, Mg 2 Si, Q(Al 1.9 Mg 4.1 Si 3.3 Cu)) in Al-Mg-Si-Cu alloys. The results reveal that the dissolution time of precipitates increases with increasing their sizes and solute concentrations in the alloy matrix; for the same size and concentration, their dissolution times follow Si > Q(Al 1.9 Mg 4.1 Si 3.3 Cu) > Mg 2 Si. Two precipitates (Mg 2 Si and Al 1.9 Mg 4.1 Si 3.3 Cu) with a size of about 700 nm were obtained in a cold rolled Al-Mg-Si-Cu-Zn alloy, and the complete dissolution time is about 15 seconds, which is basically the same as the calculated time by the developed model. The theoretical prediction of dissolution time can be greatly used to design solution treatment and thermomechanical processing parameters of Al-Mg-Si-Cu alloys.

Section: B Prediction Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Dissolution of Precipitates During Solution Treatment of Al-Mg-Si-Cu Alloys

Guo

et al. 2015

Metall Mater Trans B

Self Cite

“…Since 6xxx aluminum alloys (Al-Mg-Si-Cu series) show good bake hardening temper, 6xxx aluminum alloys are well suitable for automotive skin and other structure members in machinery 6 . The fabrication process of a typical 6xxx alloy mainly consists of casting, scalping, homogenization, hot rolling, intermediate annealing, cold rolling, solution treatment, pre-aging, natural aging, forming, painting and paint baking 2,7 . During the rolling process, an ingot sheet will be deformed to the final shape and size, accompanied by the generation of textures.…”

Section: Introductionmentioning

confidence: 99%

“…The different textures correspond to specific Euler angles (φ 1 , φ, φ 2 ) in ODF. Table 1 shows the main textures and their corresponding Euler angles and Miller indices 7,[12][13][14][15] . Different processing parameters can generate various textures of the alloys, with different mechanical properties and microstructures.…”

Section: Introductionmentioning

confidence: 99%

“…Different processing parameters can generate various textures of the alloys, with different mechanical properties and microstructures. For example, Wang et al 7 reported that different heating rates during solution treatment resulted in the formation of different textures, and thus affected the mechanical properties and microstructures of Al-0.8Mg-0.9Si-0.5Cu-0.2Fe-0.1Mn alloy. The alloy after solution treatment with fast heating rate shows a strong anisotropy and Cube texture, thus weakens the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Texture, Microstructure and Mechanical Properties of 6111 Aluminum Alloy Subject to Rolling Deformation

et al. 2017

The mechanical properties, texture and microstructural evolution of a 6111 aluminum alloy during hot rolling and cold rolling deformation were systematically investigated in this article. The results show that cold rolling and hot rolling have significant effects on the tensile behaviors of the alloy. The shear texture and recrystallization texture mainly formed during the hot rolling deformation process, while the rolling texture mainly formed during the cold rolling deformation. The grain refinement mechanisms depend significantly on the rolling process. Movement of shear zone and recrystallization are the main grain refinement mechanisms during the hot rolling process, while dislocations tangling is the main grain refinement mechanism during the cold rolling process. The recrystallization textures and shear textures affect the anisotropy in elongation but the rolling textures affect significantly the anisotropy in yield strength.

Adjusting the Si Phase and Forming Nanoprecipitation to Improve the Mechanical Properties of Al–Si–Cu–Mg Alloy by Heat Treatment

Hao

Bian

et al. 2021

Adv Eng Mater

To adjust the morphology of the Si phase and improve the mechanical properties of Al–Si–Cu–Mg alloy formed by semisolid squeeze casting, the effects of solution time on microstructure evolution and mechanical properties are systematically studied. Results show that spheroidization occurs in the Si phase, and the content of Cu in the matrix increases simultaneously after solution treatment at 525 °C for 1 h. As solution time increases to 8 h, the content of Cu in the matrix increases from 1.15% to 1.41% and the dislocation density decreases. After an aging treatment at 180 °C for 12 h, the β′, θ′, and Q′ phases precipitate. After heat treatment, the alloy strength value shows a “double peak” phenomenon. After a 1 h solution treatment, the tensile strength of the alloy reaches the first peak, which is mainly ascribed to the large dislocation density induced by the semisolid squeeze casting process. When the solution time is 8 h, the tensile strength of the alloy is 323 MPa and the tensile strength reaches the second peak, which is ascribed to the rounding of the Si phase and the strengthening effects of fine precipitates.